English Vocabulary · Grade 7 Live Review Preview

7th Grade Vocabulary Words

Seventh-grade readers are expected to move confidently among literary analysis, argument, research, science, mathematics, history, and civic discussion. This level develops precise Tier II and cross-curricular language while reinforcing context clues, word relationships, roots and affixes, multiple meanings, source evaluation, and evidence-based speaking and writing.

This independently authored 500-word beta curriculum is arranged in twenty pages of twenty-five words each. Words 1–300 include five cloze questions per page; words 301–500 remain fully visible and editable as list pages while the expanded practice layer is developed. Each row includes a subject-field label and an editable word-study note about a transparent affix, compound structure, capitalization, or dictionary base form. The supplied Grade 7 workbook calibrated difficulty and vocabulary-study skills only; all learner-facing definitions, examples, quizzes, and descriptions are original KSSR copy.

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Page 1: words 1–25

Vocabulary page 1
#	Word	Details	Meaning	Sample sentence
1	specify	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ify commonly forms a verb meaning to make or become.	to state something exactly or in enough detail	The directions specify which measurements belong in the final table.
2	divulge	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: divulge is the dictionary headword; compare its inflected or derived forms in context.	to reveal information that was meant to remain private	The journalist refused to divulge the confidential source's name.
3	align	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: align is the dictionary headword; compare its inflected or derived forms in context.	to arrange things in a straight line or bring ideas into agreement	The revised budget must align with the council's stated priorities.
4	speculation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	an idea or guess formed without complete evidence	The rumor remains speculation until a reliable witness confirms it.
5	vary	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: vary is the dictionary headword; compare its inflected or derived forms in context.	to differ or change according to the situation	Daily temperatures vary more in the desert than near the ocean.
6	conviction	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a firmly held belief or opinion	Her conviction that every child deserves books inspired the donation drive.
7	perplexity	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	a state of confusion caused by something difficult to understand	The contradictory clues left the investigators in perplexity.
8	versatile	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: versatile is the dictionary headword; compare its inflected or derived forms in context.	able to perform many different tasks or serve many purposes	A versatile tool can cut wire, tighten screws, and open packages.
9	oppose	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: oppose is the dictionary headword; compare its inflected or derived forms in context.	to disagree with or act against an idea or plan	Several residents oppose the highway because it would divide the wetland.
10	noncommittal	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Prefix focus: non- means not or without.	not clearly expressing an opinion or decision	The director gave a noncommittal reply while the proposal was still under review.
11	unabridged	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: unabridged is the dictionary headword; compare its inflected or derived forms in context.	complete and not shortened from the original	The library owns an unabridged edition containing every chapter of the novel.
12	irrational	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: irrational is the dictionary headword; compare its inflected or derived forms in context.	not based on sound reasoning or evidence	It is irrational to reject the experiment before examining its results.
13	gauge	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: gauge is the dictionary headword; compare its inflected or derived forms in context.	to estimate or measure the amount, size, or condition of something	The survey helps researchers gauge public support for the park.
14	preview	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: preview is the dictionary headword; compare its inflected or derived forms in context.	an advance look at something before its full release	The museum offered a preview of the new exhibit to local teachers.
15	status	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: status is the dictionary headword; compare its inflected or derived forms in context.	the present condition, position, or level of something	The tracking page shows the delivery status of each package.
16	prerequisite	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: prerequisite is the dictionary headword; compare its inflected or derived forms in context.	something required before another step can begin	Basic algebra is a prerequisite for the advanced robotics course.
17	presume	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: presume is the dictionary headword; compare its inflected or derived forms in context.	to suppose that something is true without complete proof	We should not presume that the quietest participant has no ideas.
18	preconceived	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: preconceived is the dictionary headword; compare its inflected or derived forms in context.	formed before considering the evidence or actual experience	The interview challenged her preconceived view of the neighborhood.
19	documentation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	written records that provide information or proof	The application requires documentation of the volunteer hours.
20	version	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: version is the dictionary headword; compare its inflected or derived forms in context.	a particular form of something that differs from other forms	The director chose a shorter version of the play for the festival.
21	academic	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: academic is the dictionary headword; compare its inflected or derived forms in context.	related to education, study, or scholarly work	The article uses academic language but explains each specialized term.
22	precise	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: precise is the dictionary headword; compare its inflected or derived forms in context.	exact, accurate, and carefully expressed	A precise description allowed the technician to locate the fault quickly.
23	competent	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: competent is the dictionary headword; compare its inflected or derived forms in context.	having enough skill or knowledge to perform a task well	A competent editor checks facts as well as grammar.
24	inquisitive	adjective Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	eager to ask questions and learn more	The inquisitive visitor examined every label in the science gallery.
25	principle	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: principle is the dictionary headword; compare its inflected or derived forms in context.	a basic rule, belief, or truth that guides thought or behavior	Fairness is the principle behind giving each speaker equal time.

Previewing the Water Report

Reading practice for pages 1–3. Five relevant words are highlighted.

English reading

Before officials divulge a river report, scientists preview its charts. The figures gauge water quality and specify where pollution increased. A colored symbol shows the status of each testing site, making the findings easier to interpret.

Reading comprehension

1. What do scientists preview?

They preview the river report's charts.

2. What do the figures gauge?

They gauge water quality.

3. What does each symbol show?

Each symbol shows a testing site's status.

Cloze vocabulary quiz

1. The survey helps researchers ___ public support for the park.

Answer: gauge

2. The directions ___ which measurements belong in the final table.

Answer: specify

3. The museum offered a ___ of the new exhibit to local teachers.

Answer: preview

4. The journalist refused to ___ the confidential source's name.

Answer: divulge

5. The tracking page shows the delivery ___ of each package.

Answer: status

Page 2: words 26–50

Vocabulary page 2
#	Word	Details	Meaning	Sample sentence
26	modify	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: modify is the dictionary headword; compare its inflected or derived forms in context.	to change something partly without replacing it completely	Engineers will modify the design so the ramp is less steep.
27	itemize	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	to list separate things one by one	The receipt will itemize every material purchased for the repair.
28	compare	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: compare is the dictionary headword; compare its inflected or derived forms in context.	to examine things in order to identify similarities or differences	Readers compare the two accounts before deciding where they agree.
29	categorize	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	to place things into groups based on shared features	Researchers categorize the shells by shape, color, and texture.
30	validate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: validate is the dictionary headword; compare its inflected or derived forms in context.	to confirm that something is accurate, sound, or acceptable	A second trial can validate the surprising result.
31	differentiate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: differentiate is the dictionary headword; compare its inflected or derived forms in context.	to recognize or show the difference between similar things	The key helps students differentiate harmless insects from harmful ones.
32	critique	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: critique is the dictionary headword; compare its inflected or derived forms in context.	to evaluate something carefully by discussing strengths and weaknesses	Partners critique each proposal using the same three criteria.
33	outline	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: outline is the dictionary headword; compare its inflected or derived forms in context.	to arrange the main ideas of a text or plan in order	Before drafting, Mina will outline the reasons for protecting the marsh.
34	proofread	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: proofread is the dictionary headword; compare its inflected or derived forms in context.	to check written work for spelling, punctuation, and typing errors	Please proofread the report after making the final revisions.
35	organize	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	to arrange ideas or objects into a clear system	Color-coded folders organize the records by month.
36	prioritize	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	to decide which tasks or needs are most important	Emergency crews prioritize people who need immediate medical help.
37	monitor	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: monitor is the dictionary headword; compare its inflected or derived forms in context.	to watch or measure something over time	Sensors monitor the bridge for unusual movement.
38	integrate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: integrate is the dictionary headword; compare its inflected or derived forms in context.	to combine parts so they work together as a whole	The presentation will integrate maps, quotations, and survey data.
39	transfer	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: transfer is the dictionary headword; compare its inflected or derived forms in context.	to move something from one person, place, or system to another	The cable can transfer the photographs to a computer.
40	define	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: define is the dictionary headword; compare its inflected or derived forms in context.	to state the exact meaning or limits of something	The opening paragraph should define the problem before proposing a solution.
41	describe	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: describe is the dictionary headword; compare its inflected or derived forms in context.	to explain what someone or something is like using relevant details	The witness could describe the missing bicycle in detail.
42	respond	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: respond is the dictionary headword; compare its inflected or derived forms in context.	to answer or react to a question, event, or situation	The essay must respond directly to the prompt's central question.
43	participate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: participate is the dictionary headword; compare its inflected or derived forms in context.	to take part in an activity or event	Every student may participate in the discussion by speaking or writing.
44	facilitate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: facilitate is the dictionary headword; compare its inflected or derived forms in context.	to make a process or activity easier	Clear labels facilitate the safe use of laboratory equipment.
45	persuade	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: persuade is the dictionary headword; compare its inflected or derived forms in context.	to cause someone to accept an idea or take an action through reasons	Strong evidence may persuade the board to restore the bus route.
46	recommend	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: recommend is the dictionary headword; compare its inflected or derived forms in context.	to advise that a particular choice or action is suitable	The committee will recommend the safest location for the crossing.
47	propose	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: propose is the dictionary headword; compare its inflected or derived forms in context.	to present an idea or plan for consideration	The students propose turning the vacant lot into a community garden.
48	inquire	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: inquire is the dictionary headword; compare its inflected or derived forms in context.	to ask for information	Visitors can inquire about accessible tours at the front desk.
49	consult	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: consult is the dictionary headword; compare its inflected or derived forms in context.	to seek information or advice from a knowledgeable source	The builders consult an engineer before altering the support beam.
50	resolve	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: resolve is the dictionary headword; compare its inflected or derived forms in context.	to solve a problem or settle a disagreement	A neutral mediator helped the neighbors resolve the boundary dispute.

Page 2 vocabulary review

Review five selected words from page 2.

Cloze vocabulary quiz

1. The presentation will ___ maps, quotations, and survey data.

Answer: integrate

2. Engineers will ___ the design so the ramp is less steep.

Answer: modify

3. The cable can ___ the photographs to a computer.

Answer: transfer

4. The receipt will ___ every material purchased for the repair.

Answer: itemize

5. The opening paragraph should ___ the problem before proposing a solution.

Answer: define

Page 3: words 51–75

Vocabulary page 3
#	Word	Details	Meaning	Sample sentence
51	refine	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: refine is the dictionary headword; compare its inflected or derived forms in context.	to improve something through small, careful changes	Repeated testing will refine the team’s model.
52	transform	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: transform is the dictionary headword; compare its inflected or derived forms in context.	to change something greatly in form, appearance, or character	New lighting can transform the unused warehouse into a theater.
53	contract	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: contract is the dictionary headword; compare its inflected or derived forms in context.	to become smaller or shorter	Metal may contract when its temperature drops.
54	distribute	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: distribute is the dictionary headword; compare its inflected or derived forms in context.	to give or send portions of something to several recipients	Volunteers distribute clean water after the storm.
55	separate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: separate is the dictionary headword; compare its inflected or derived forms in context.	to divide or keep things apart	A mesh screen can separate large stones from fine soil.
56	generate	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: generate is the dictionary headword; compare its inflected or derived forms in context.	to produce or create something	The rooftop panels generate electricity on sunny days.
57	reinforce	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: reinforce is the dictionary headword; compare its inflected or derived forms in context.	to strengthen an object, idea, or behavior	Steel beams reinforce the old building during earthquakes.
58	highlight	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: highlight is the dictionary headword; compare its inflected or derived forms in context.	to draw special attention to something important	The conclusion should highlight the strongest evidence.
59	perceive	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: perceive is the dictionary headword; compare its inflected or derived forms in context.	to notice, understand, or interpret something through the senses or mind	Bats perceive their surroundings through reflected sound.
60	apply	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: apply is the dictionary headword; compare its inflected or derived forms in context.	to put knowledge, a rule, or a method into use	Students apply the formula to a new set of measurements.
61	rehearse	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: rehearse is the dictionary headword; compare its inflected or derived forms in context.	to practice in preparation for a performance or presentation	The actors rehearse the final scene until every movement is clear.
62	memorize	verb Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	to learn something so it can be recalled exactly	Instead of trying to memorize every line, understand the argument's structure.
63	review	verb Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: review is the dictionary headword; compare its inflected or derived forms in context.	to examine material again in order to evaluate or remember it	Niko will review his notes before writing the summary.
64	credibility	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ibility forms a noun for the capacity to have a quality or perform an action.	the quality of being believable and trustworthy	Citations and transparent methods increase a report's credibility.
65	counterclaim	noun Study Field: Grade 7 academic reading and reasoning word Word study: Prefix focus: counter- means against, opposing, or responding to.	a claim that opposes another claim in an argument	The essay answers the counterclaim with evidence from two studies.
66	reasoning	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: reasoning is the dictionary headword; compare its inflected or derived forms in context.	the process of forming conclusions through connected ideas and evidence	The answer is correct, but its reasoning needs clearer steps.
67	inference	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	a conclusion reached from evidence rather than a direct statement	The muddy footprints support the inference that someone entered from outside.
68	analysis	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: analysis is the dictionary headword; compare its inflected or derived forms in context.	a careful examination of parts, patterns, or meanings	Her analysis explains how the poem's repeated image develops its theme.
69	quotation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	words repeated exactly from a source	The quotation supports the paragraph because it states the witness's observation.
70	citation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a note identifying the source of information or quoted words	Each borrowed statistic needs a citation.
71	glossary	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: glossary is the dictionary headword; compare its inflected or derived forms in context.	an alphabetical list explaining specialized terms in a text	The glossary defines unfamiliar words used in the ecology chapter.
72	appendix	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: appendix is the dictionary headword; compare its inflected or derived forms in context.	a section at the end of a work containing extra information	The report's appendix contains the complete survey questions.
73	bibliography	noun Study Field: Grade 7 academic reading and reasoning word Word study: Root and suffix focus: -graphy relates to writing, recording, or describing.	a list of sources used or consulted for a work	The bibliography identifies every book, interview, and website in the project.
74	propaganda	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: propaganda is the dictionary headword; compare its inflected or derived forms in context.	information designed to shape opinion, often by presenting only one side	The poster used propaganda to portray every critic as an enemy.
75	disinformation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	false information deliberately spread to deceive people	Officials corrected the disinformation with verified public records.

Page 3 vocabulary review

Review five selected words from page 3.

Cloze vocabulary quiz

1. Repeated testing will ___ the team’s model.

Answer: refine

2. Citations and transparent methods increase a report's ___.

Answer: credibility

3. New lighting can ___ the unused warehouse into a theater.

Answer: transform

4. The essay answers the ___ with evidence from two studies.

Answer: counterclaim

5. Metal may ___ when its temperature drops.

Answer: contract

Page 4: words 76–100

Vocabulary page 4
#	Word	Details	Meaning	Sample sentence
76	stereotype	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: stereotype is the dictionary headword; compare its inflected or derived forms in context.	an oversimplified belief applied to every member of a group	The documentary challenges the stereotype with varied personal accounts.
77	interpretation	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	an explanation of the meaning or importance of something	Her interpretation of the ending depends on the final image of the open gate.
78	continuity	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	the state of continuing without an unexplained break	Shared symbols create continuity between the novel's three sections.
79	nonfiction	noun Study Field: Grade 7 academic reading and reasoning word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	writing about real people, events, or information	The nonfiction book explains the expedition using maps and journal entries.
80	narrative	noun Study Field: Grade 7 academic reading and reasoning word Word study: Base-form focus: narrative is the dictionary headword; compare its inflected or derived forms in context.	an account or story of connected events	The oral history presents a personal narrative of migration.
81	fiction	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: fiction is the dictionary headword; compare its inflected or derived forms in context.	literature created from imagined characters and events	The fiction blends an invented family with an accurately researched setting.
82	legend	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: legend is the dictionary headword; compare its inflected or derived forms in context.	a traditional story connected to a person, place, or historical event	According to the local legend, a hidden bell rings before a storm.
83	mythology	noun Study Field: Grade 7 literature and composition word Word study: Root and suffix focus: -logy means the study of a subject.	a collection or study of traditional stories about gods and origins	The course compares sea deities in Greek and Polynesian mythology.
84	fable	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: fable is the dictionary headword; compare its inflected or derived forms in context.	a brief story that teaches a lesson, often through talking animals	The fable uses a proud crow to warn against empty flattery.
85	memoir	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: memoir is the dictionary headword; compare its inflected or derived forms in context.	a nonfiction account of experiences from the author's life	In her memoir, the pilot recalls learning to navigate by the stars.
86	biography	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: biography is the dictionary headword; compare its inflected or derived forms in context.	the written story of another person's life	The biography traces the scientist's work from childhood experiments to major discoveries.
87	autobiography	noun Study Field: Grade 7 literature and composition word Word study: Root and suffix focus: -graphy relates to writing, recording, or describing.	the written story of a person's life told by that person	The musician's autobiography describes both failures and successes.
88	drama	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: drama is the dictionary headword; compare its inflected or derived forms in context.	a work written to be performed by actors	The drama reveals its conflict through dialogue and stage directions.
89	comedy	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: comedy is the dictionary headword; compare its inflected or derived forms in context.	a humorous play or story that usually ends positively	The comedy turns a series of mistaken identities into a joyful reunion.
90	tragedy	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: tragedy is the dictionary headword; compare its inflected or derived forms in context.	a serious work in which conflict leads to suffering or disaster	The tragedy shows how the ruler's pride harms the entire city.
91	fantasy	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: fantasy is the dictionary headword; compare its inflected or derived forms in context.	fiction containing magic or other impossible elements	The fantasy imagines a library whose books can speak.
92	mystery	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: mystery is the dictionary headword; compare its inflected or derived forms in context.	a story centered on solving an unexplained event or crime	The mystery provides enough clues for careful readers to identify the thief.
93	adventure	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: adventure is the dictionary headword; compare its inflected or derived forms in context.	a story or experience involving danger, excitement, or discovery	The adventure follows two friends across an unmapped island.
94	romance	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: romance is the dictionary headword; compare its inflected or derived forms in context.	a story whose central plot concerns love between characters	The historical romance develops alongside the struggle to save the family farm.
95	realism	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a style that represents ordinary life in a believable way	The novel's realism appears in its detailed portrayal of factory work.
96	dystopia	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: dystopia is the dictionary headword; compare its inflected or derived forms in context.	an imagined society marked by suffering, control, or injustice	The dystopia warns readers about a government that erases personal memories.
97	allegory	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: allegory is the dictionary headword; compare its inflected or derived forms in context.	a story in which characters and events represent broader ideas	The journey is an allegory about the search for knowledge.
98	narration	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the act or method of telling a story	First-person narration limits the reader to one character's knowledge.
99	setting	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: setting is the dictionary headword; compare its inflected or derived forms in context.	the time and place in which a story occurs	The isolated lighthouse provides a tense setting for the mystery.
100	plot	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: plot is the dictionary headword; compare its inflected or derived forms in context.	the connected sequence of main events in a story	The plot changes direction when the missing map is discovered.

Comedy and Stereotype

Reading practice for pages 4–6. Five relevant words are highlighted.

English reading

A theater group compares comedy with tragedy. Their interpretation avoids using a harmful stereotype merely for laughter. To preserve continuity, the same actor carries one character’s choices from the first scene to the last.

Reading comprehension

1. What two forms does the group compare?

The group compares comedy and tragedy.

2. What does their interpretation avoid?

It avoids a harmful stereotype.

3. How do they preserve continuity?

One actor maintains the character's choices throughout.

Cloze vocabulary quiz

1. The documentary challenges the ___ with varied personal accounts.

Answer: stereotype

2. The ___ turns a series of mistaken identities into a joyful reunion.

Answer: comedy

3. Her ___ of the ending depends on the final image of the open gate.

Answer: interpretation

4. The ___ shows how the ruler's pride harms the entire city.

Answer: tragedy

5. Shared symbols create ___ between the novel's three sections.

Answer: continuity

Page 5: words 101–125

Vocabulary page 5
#	Word	Details	Meaning	Sample sentence
101	complication	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	an event or problem that makes a situation more difficult	A sudden flood creates a complication in the travelers' plan.
102	tension	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: tension is the dictionary headword; compare its inflected or derived forms in context.	a feeling of strain or uncertainty created by conflict	The locked door increases the tension as footsteps approach.
103	theme	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: theme is the dictionary headword; compare its inflected or derived forms in context.	a central idea explored through a literary work	The theme of responsibility develops through each character's choices.
104	character	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: character is the dictionary headword; compare its inflected or derived forms in context.	a person, animal, or being represented in a story	The youngest character notices the clue that every adult missed.
105	characterization	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	the methods used to reveal a character's traits	The author uses dialogue and actions for indirect characterization.
106	dialogue	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: dialogue is the dictionary headword; compare its inflected or derived forms in context.	spoken conversation between characters	The dialogue reveals that the sisters remember the event differently.
107	monologue	noun Study Field: Grade 7 literature and composition word Word study: Prefix focus: mono- means one or single.	a long speech delivered by one character	In the monologue, the captain explains why she abandoned the voyage.
108	soliloquy	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: soliloquy is the dictionary headword; compare its inflected or derived forms in context.	a speech in which a character alone onstage reveals private thoughts	The prince's soliloquy exposes his fear of making the wrong decision.
109	stagecraft	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: stagecraft is the dictionary headword; compare its inflected or derived forms in context.	the practical techniques used to create a theatrical performance	Effective stagecraft turns simple fabric and light into an ocean storm.
110	scene	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: scene is the dictionary headword; compare its inflected or derived forms in context.	a section of a play or story occurring in one time and place	The courtroom scene brings the two opposing witnesses together.
111	act	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: act is the dictionary headword; compare its inflected or derived forms in context.	a major division of a play	The conflict becomes unavoidable at the end of the second act.
112	stanza	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: stanza is the dictionary headword; compare its inflected or derived forms in context.	a grouped set of lines forming a section of a poem	Each stanza describes the river during a different season.
113	verse	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: verse is the dictionary headword; compare its inflected or derived forms in context.	writing arranged in rhythmic lines, especially poetry	The ballad tells the sailor's story in verse.
114	prose	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: prose is the dictionary headword; compare its inflected or derived forms in context.	ordinary written language arranged in sentences and paragraphs	The author shifts from verse to prose when the formal ceremony ends.
115	couplet	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: couplet is the dictionary headword; compare its inflected or derived forms in context.	two consecutive lines of poetry that form a unit	The poem closes with a rhyming couplet.
116	quatrain	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: quatrain is the dictionary headword; compare its inflected or derived forms in context.	a stanza made of four lines	The first quatrain introduces the image of an empty road.
117	meter	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: meter is the dictionary headword; compare its inflected or derived forms in context.	the regular pattern of stressed and unstressed syllables in poetry	The steady meter resembles the beat of marching feet.
118	rhythm	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: rhythm is the dictionary headword; compare its inflected or derived forms in context.	a pattern of beats, stresses, or sounds	Short repeated phrases give the speech a memorable rhythm.
119	rhyme	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: rhyme is the dictionary headword; compare its inflected or derived forms in context.	the repetition of similar ending sounds in words	The poet avoids perfect rhyme to create an uneasy effect.
120	cadence	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: cadence is the dictionary headword; compare its inflected or derived forms in context.	the rise, fall, and rhythm of a voice or line of language	The sentence's slow cadence matches the character's exhaustion.
121	chorus	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: chorus is the dictionary headword; compare its inflected or derived forms in context.	a repeated section of a song or a group speaking together in a play	The chorus comments on events that the main characters cannot see.
122	assonance	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	repetition of vowel sounds in nearby words	The phrase “low road home” uses assonance to slow the line.
123	consonance	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	repetition of consonant sounds within or at the ends of nearby words	The repeated final t sound creates consonance in the short verse.
124	mood	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: mood is the dictionary headword; compare its inflected or derived forms in context.	the feeling or atmosphere a text creates for readers	Rain and empty streets establish a lonely mood.
125	first-person	adjective Study Field: Grade 7 literature and composition word Word study: Term structure: first + person. Study the complete expression as one field-specific unit.	using a narrator who refers to himself or herself as I or we	The first-person account reveals the explorer's doubts directly.

Page 5 vocabulary review

Review five selected words from page 5.

Cloze vocabulary quiz

1. The author shifts from verse to ___ when the formal ceremony ends.

Answer: prose

2. The locked door increases the ___ as footsteps approach.

Answer: tension

3. The poem closes with a rhyming ___.

Answer: couplet

4. The ___ of responsibility develops through each character's choices.

Answer: theme

5. The first ___ introduces the image of an empty road.

Answer: quatrain

Page 6: words 126–150

Vocabulary page 6
#	Word	Details	Meaning	Sample sentence
126	third-person	adjective Study Field: Grade 7 literature and composition word Word study: Term structure: third + person. Study the complete expression as one field-specific unit.	using a narrator who refers to characters as he, she, they, or names	The third-person narrator follows several members of the family.
127	episodic	adjective Study Field: Grade 7 literature and composition word Word study: Base-form focus: episodic is the dictionary headword; compare its inflected or derived forms in context.	organized as a series of loosely connected events or sections	The episodic novel visits a different town in each chapter.
128	genre	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: genre is the dictionary headword; compare its inflected or derived forms in context.	a category of art or literature with shared features	Readers recognize the detective genre by its clues and investigation.
129	convention	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	an accepted feature or practice of a particular form or genre	A hidden clue is a common convention of mystery stories.
130	trope	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: trope is the dictionary headword; compare its inflected or derived forms in context.	a familiar recurring idea, image, or type in stories	The reluctant hero is a trope that writers can use or challenge.
131	inscription	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	words carved, engraved, or written on a lasting surface	The weathered inscription names the bridge's original builder.
132	premonition	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ition commonly forms a noun naming an action, process, or result.	a strong feeling that a future event is about to happen	Her uneasy premonition foreshadows the storm.
133	posterity	noun Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	people who will live in future generations	The archivist preserved the letters for posterity.
134	postscript	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: postscript is the dictionary headword; compare its inflected or derived forms in context.	an additional message written after the main ending of a letter	The postscript adds one final clue about the missing key.
135	sentimental	adjective Study Field: Grade 7 literature and composition word Word study: Base-form focus: sentimental is the dictionary headword; compare its inflected or derived forms in context.	strongly influenced by tender feelings or memories	The worn toy has sentimental value because it belonged to her grandmother.
136	somberly	adverb Study Field: Grade 7 literature and composition word Word study: Suffix focus: -ly commonly forms an adverb describing how an action occurs.	in a serious, sad, or gloomy manner	The narrator speaks somberly after describing the village's destruction.
137	mock	verb Study Field: Grade 7 literature and composition word Word study: Base-form focus: mock is the dictionary headword; compare its inflected or derived forms in context.	to imitate or speak about someone in a cruel or scornful way	The bullies mock the new student's accent until a friend intervenes.
138	jest	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: jest is the dictionary headword; compare its inflected or derived forms in context.	a joke or playful remark	His jest eased the tension without insulting anyone.
139	regal	adjective Study Field: Grade 7 literature and composition word Word study: Base-form focus: regal is the dictionary headword; compare its inflected or derived forms in context.	grand and dignified in a way associated with royalty	The actor's regal posture makes the queen immediately recognizable.
140	glee	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: glee is the dictionary headword; compare its inflected or derived forms in context.	great delight or lively joy	The children shouted with glee when the curtain rose.
141	camouflage	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: camouflage is the dictionary headword; compare its inflected or derived forms in context.	coloring or material that helps something blend into its surroundings	The costume designer used leaf-patterned camouflage for the forest spirits.
142	alter	verb Study Field: Grade 7 literature and composition word Word study: Base-form focus: alter is the dictionary headword; compare its inflected or derived forms in context.	to change something without necessarily replacing it	The director will alter the ending to fit the shorter performance.
143	idol	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: idol is the dictionary headword; compare its inflected or derived forms in context.	a person or object admired with extreme devotion	The novel questions whether a famous athlete should become an unquestioned idol.
144	heir	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: heir is the dictionary headword; compare its inflected or derived forms in context.	a person legally entitled to inherit a position or property	The missing heir returns just before the estate is sold.
145	principal	noun Study Field: Grade 7 literature and composition word Word study: Base-form focus: principal is the dictionary headword; compare its inflected or derived forms in context.	a leading person or the head administrator of a school	The principal character must decide whether to reveal the secret.
146	biome	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: biome is the dictionary headword; compare its inflected or derived forms in context.	a large ecological region defined by climate and typical life	The tundra biome supports mosses, lichens, and cold-adapted animals.
147	variation	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	a difference among individuals or forms of the same kind	Color variation helps some beetles blend into different backgrounds.
148	genetics	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: genetics is the dictionary headword; compare its inflected or derived forms in context.	the study of genes and inherited traits	Genetics can help explain why related plants share certain features.
149	gene	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: gene is the dictionary headword; compare its inflected or derived forms in context.	a unit of inherited information passed from parent to offspring	A gene may influence the color of a flower.
150	allele	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: allele is the dictionary headword; compare its inflected or derived forms in context.	one of two or more forms of the same gene	An offspring receives one allele for the trait from each parent.

Page 6 vocabulary review

Review five selected words from page 6.

Cloze vocabulary quiz

1. The actor's ___ posture makes the queen immediately recognizable.

Answer: regal

2. The ___ novel visits a different town in each chapter.

Answer: episodic

3. The children shouted with ___ when the curtain rose.

Answer: glee

4. Readers recognize the detective ___ by its clues and investigation.

Answer: genre

5. The costume designer used leaf-patterned ___ for the forest spirits.

Answer: camouflage

Page 7: words 151–175

Vocabulary page 7
#	Word	Details	Meaning	Sample sentence
151	mutation	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a change in genetic material	A mutation may be harmful, helpful, or have no visible effect.
152	selection	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	the process by which some inherited traits become more common	Natural selection favors traits that improve survival and reproduction.
153	evolution	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	change in inherited traits of populations across generations	Fossils provide evidence of evolution over long periods.
154	parasitism	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a relationship in which one organism benefits while another is harmed	A tick feeding on a deer is an example of parasitism.
155	mutualism	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a relationship in which both organisms benefit	Bees and flowering plants often participate in mutualism.
156	commensalism	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a relationship in which one organism benefits and the other is largely unaffected	A bird nesting in a tree may illustrate commensalism.
157	nucleus	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: nucleus is the dictionary headword; compare its inflected or derived forms in context.	the cell structure that contains most genetic material	The nucleus directs many activities of a eukaryotic cell.
158	cytoplasm	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: cytoplasm is the dictionary headword; compare its inflected or derived forms in context.	the jellylike material inside a cell surrounding its structures	Chemical reactions occur throughout the cytoplasm.
159	skeletal	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: skeletal is the dictionary headword; compare its inflected or derived forms in context.	related to the framework of bones supporting a body	The skeletal system protects organs and provides support.
160	muscular	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: muscular is the dictionary headword; compare its inflected or derived forms in context.	related to muscles or produced by muscles	The muscular system pulls on bones to create movement.
161	digestive	adjective Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	related to breaking food into nutrients the body can absorb	The digestive system begins processing food in the mouth.
162	endocrine	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: endocrine is the dictionary headword; compare its inflected or derived forms in context.	related to glands that release hormones into the body	The endocrine system helps regulate growth and metabolism.
163	immune	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: immune is the dictionary headword; compare its inflected or derived forms in context.	related to the body's defense against disease	An immune response targets a harmful pathogen.
164	bacterium	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: bacterium is the dictionary headword; compare its inflected or derived forms in context.	a single-celled microorganism without a nucleus	One bacterium can reproduce quickly under favorable conditions.
165	nutrition	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ition commonly forms a noun naming an action, process, or result.	the process of obtaining and using food for health and growth	Balanced nutrition supplies energy and essential nutrients.
166	puberty	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: puberty is the dictionary headword; compare its inflected or derived forms in context.	the period when a young person's body develops toward adulthood	Hormones cause many physical changes during puberty.
167	embryo	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: embryo is the dictionary headword; compare its inflected or derived forms in context.	an organism in an early stage of development	The plant embryo is protected inside the seed.
168	ecology	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: ecology is the dictionary headword; compare its inflected or derived forms in context.	the study of relationships among organisms and their environment	Ecology examines how water quality affects an entire food web.
169	contamination	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the presence of a harmful or unwanted substance	Testing revealed bacterial contamination in the well.
170	crystal	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: crystal is the dictionary headword; compare its inflected or derived forms in context.	a solid whose particles form an orderly repeating structure	Each salt crystal has a regular cubic shape.
171	epicenter	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: epicenter is the dictionary headword; compare its inflected or derived forms in context.	the point on Earth's surface directly above an earthquake's origin	Shaking was strongest near the earthquake's epicenter.
172	seismic	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: seismic is the dictionary headword; compare its inflected or derived forms in context.	related to earthquakes or vibrations within Earth	Seismic waves allow scientists to study Earth's interior.
173	tsunami	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: tsunami is the dictionary headword; compare its inflected or derived forms in context.	a series of large ocean waves caused by sudden water displacement	The offshore earthquake triggered a tsunami warning.
174	troposphere	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: troposphere is the dictionary headword; compare its inflected or derived forms in context.	the lowest layer of the atmosphere where most weather occurs	Clouds and storms form mainly in the troposphere.
175	stratosphere	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: stratosphere is the dictionary headword; compare its inflected or derived forms in context.	the atmospheric layer above the troposphere containing the ozone layer	Weather balloons can rise into the stratosphere.

Changes in a Pond

Reading practice for pages 7–9. Five relevant words are highlighted.

English reading

A pond study follows frogs from tadpoles through puberty. Good nutrition supports their growth, while parasitism can weaken them. Across many generations, natural selection influences evolution by favoring traits that help frogs survive local conditions.

Reading comprehension

1. What supports frog growth?

Good nutrition supports frog growth.

2. What can weaken frogs?

Parasitism can weaken frogs.

3. How does selection influence evolution?

It favors traits that help organisms survive.

Cloze vocabulary quiz

1. Natural ___ favors traits that improve survival and reproduction.

Answer: selection

2. Balanced ___ supplies energy and essential nutrients.

Answer: nutrition

3. Fossils provide evidence of ___ over long periods.

Answer: evolution

4. Hormones cause many physical changes during ___.

Answer: puberty

5. A tick feeding on a deer is an example of ___.

Answer: parasitism

Page 8: words 176–200

Vocabulary page 8
#	Word	Details	Meaning	Sample sentence
176	weather	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: weather is the dictionary headword; compare its inflected or derived forms in context.	the short-term condition of the atmosphere at a place and time	Today's weather includes strong wind and scattered rain.
177	drought	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: drought is the dictionary headword; compare its inflected or derived forms in context.	a long period with unusually little rain	The drought lowered reservoirs and damaged crops.
178	cyclone	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: cyclone is the dictionary headword; compare its inflected or derived forms in context.	a large rotating storm system around a low-pressure center	The satellite image shows the cyclone turning over warm water.
179	hurricane	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: hurricane is the dictionary headword; compare its inflected or derived forms in context.	a powerful tropical cyclone forming over the Atlantic or eastern Pacific	The hurricane strengthened before reaching the coast.
180	tornado	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: tornado is the dictionary headword; compare its inflected or derived forms in context.	a violently rotating column of air extending from a storm cloud	The tornado damaged a narrow path through the town.
181	tide	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: tide is the dictionary headword; compare its inflected or derived forms in context.	the regular rise and fall of ocean water caused mainly by gravity	The falling tide exposed pools among the rocks.
182	weight	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: weight is the dictionary headword; compare its inflected or derived forms in context.	the force of gravity pulling on an object	An astronaut's weight changes with gravity, but her mass does not.
183	buoyancy	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: buoyancy is the dictionary headword; compare its inflected or derived forms in context.	the upward force a fluid exerts on an object	Buoyancy keeps the empty bottle floating.
184	pressure	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: pressure is the dictionary headword; compare its inflected or derived forms in context.	force applied over a particular area	Air pressure decreases as elevation increases.
185	potential	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: potential is the dictionary headword; compare its inflected or derived forms in context.	stored ability to cause change or do work	The raised book has gravitational potential because it can fall.
186	thermal	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: thermal is the dictionary headword; compare its inflected or derived forms in context.	related to heat or temperature	A thermal camera detects differences in surface temperature.
187	electrical	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: electrical is the dictionary headword; compare its inflected or derived forms in context.	related to electric charge or current	The electrical circuit opens when the switch is lifted.
188	nuclear	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: nuclear is the dictionary headword; compare its inflected or derived forms in context.	related to the nucleus of an atom	A nuclear reaction changes an atom's nucleus.
189	radiant	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: radiant is the dictionary headword; compare its inflected or derived forms in context.	transmitted as waves or particles, especially heat or light	The Sun provides radiant energy to Earth.
190	sound	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: sound is the dictionary headword; compare its inflected or derived forms in context.	energy carried through matter by vibrations	Sound travels faster through water than through air.
191	amplitude	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: amplitude is the dictionary headword; compare its inflected or derived forms in context.	the maximum distance a wave moves from its resting position	Greater amplitude usually makes a sound seem louder.
192	absorption	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	the process of taking in energy or matter	Dark fabric has greater absorption of visible light than white fabric.
193	conduction	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	transfer of heat or charge through direct contact	The metal spoon warms by conduction.
194	radiation	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	energy transmitted through waves or moving particles	Solar radiation can travel through empty space.
195	voltage	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: voltage is the dictionary headword; compare its inflected or derived forms in context.	the electrical potential difference that pushes charge through a circuit	Increasing the voltage made the bulb glow brighter.
196	solvent	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: solvent is the dictionary headword; compare its inflected or derived forms in context.	a substance that dissolves another substance	Water acts as the solvent in a sugar solution.
197	acid	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: acid is the dictionary headword; compare its inflected or derived forms in context.	a substance that releases hydrogen ions in water and has a pH below seven	Lemon juice contains an acid called citric acid.
198	neutralization	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	a reaction in which an acid and a base reduce each other's effects	The neutralization produced water and a salt.
199	periodic	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: periodic is the dictionary headword; compare its inflected or derived forms in context.	repeating at regular intervals	A swinging pendulum has periodic motion.
200	laboratory	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: laboratory is the dictionary headword; compare its inflected or derived forms in context.	a place equipped for scientific experiments and analysis	The samples remained sealed until they reached the laboratory.

Page 8 vocabulary review

Review five selected words from page 8.

Cloze vocabulary quiz

1. The ___ lowered reservoirs and damaged crops.

Answer: drought

2. ___ travels faster through water than through air.

Answer: sound

3. The satellite image shows the ___ turning over warm water.

Answer: cyclone

4. Greater ___ usually makes a sound seem louder.

Answer: amplitude

5. The ___ strengthened before reaching the coast.

Answer: hurricane

Page 9: words 201–225

Vocabulary page 9
#	Word	Details	Meaning	Sample sentence
201	apparatus	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: apparatus is the dictionary headword; compare its inflected or derived forms in context.	a set of equipment arranged for a particular task	The filtration apparatus includes a funnel, paper, and collection flask.
202	control	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: control is the dictionary headword; compare its inflected or derived forms in context.	the standard condition used for comparison in an experiment	The untreated plant served as the control.
203	constant	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: constant is the dictionary headword; compare its inflected or derived forms in context.	a factor kept unchanged during an investigation	Water volume was a constant in every trial.
204	measurement	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	a number and unit describing a quantity	Record each measurement to the nearest millimeter.
205	accuracy	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: accuracy is the dictionary headword; compare its inflected or derived forms in context.	closeness of a measurement or statement to the true value	Calibration improved the thermometer's accuracy.
206	error	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: error is the dictionary headword; compare its inflected or derived forms in context.	a mistake or source of inaccuracy in a result	Reading the scale from an angle can introduce error.
207	hazard	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: hazard is the dictionary headword; compare its inflected or derived forms in context.	something capable of causing harm	Loose wires create an electrical hazard.
208	toxic	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: toxic is the dictionary headword; compare its inflected or derived forms in context.	poisonous or capable of causing serious harm	The label warns that the liquid is toxic if swallowed.
209	corrosive	adjective Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	able to damage materials through chemical action	Technicians wear gloves when handling the corrosive acid.
210	flammable	adjective Study Field: Grade 7 science and engineering word Word study: Suffix focus: -able means capable of, suitable for, or worthy of an action.	able to catch fire easily	Store the flammable solvent away from sparks.
211	microscope	noun Study Field: Grade 7 science and engineering word Word study: Prefix focus: micro- means small.	an instrument that enlarges objects too small to see clearly	The microscope revealed cell walls in the onion tissue.
212	specimen	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: specimen is the dictionary headword; compare its inflected or derived forms in context.	an individual object or organism studied as an example	The rock specimen contains visible quartz crystals.
213	dissection	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	careful cutting apart to examine internal structures	The flower dissection revealed its reproductive parts.
214	model	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: model is the dictionary headword; compare its inflected or derived forms in context.	a simplified representation used to explain or test something	The globe is a model of Earth, not an exact copy.
215	simulation	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	an imitation of a real process or system	The computer simulation predicts how traffic may flow.
216	engineering	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: engineering is the dictionary headword; compare its inflected or derived forms in context.	the use of science and mathematics to design solutions	Bridge engineering balances strength, cost, and safety.
217	optimization	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	the process of making a design or system work as effectively as possible	Route optimization reduced both travel time and fuel use.
218	machine	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: machine is the dictionary headword; compare its inflected or derived forms in context.	a device that changes force, motion, or energy to perform work	The simple machine lets one person lift the heavy crate.
219	lever	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: lever is the dictionary headword; compare its inflected or derived forms in context.	a rigid bar that pivots around a fixed point	The crowbar acts as a lever when lifting the lid.
220	pulley	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: pulley is the dictionary headword; compare its inflected or derived forms in context.	a grooved wheel with a rope or cable used to redirect force	A pulley helped raise the flag.
221	gear	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: gear is the dictionary headword; compare its inflected or derived forms in context.	a toothed wheel that transfers motion to another toothed part	The smaller gear turns faster than the larger gear.
222	axle	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: axle is the dictionary headword; compare its inflected or derived forms in context.	a rod on which a wheel turns or that turns with a wheel	The bicycle wheel rotates around its axle.
223	wedge	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: wedge is the dictionary headword; compare its inflected or derived forms in context.	a simple machine with sloping sides used to split, cut, or lift	The blade is a wedge that pushes material apart.
224	efficiency	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: efficiency is the dictionary headword; compare its inflected or derived forms in context.	the proportion of useful output compared with total input	Lubrication increased the motor's efficiency.
225	code	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: code is the dictionary headword; compare its inflected or derived forms in context.	instructions written for a computer to follow	The code tells the sensor when to activate the alarm.

Page 9 vocabulary review

Review five selected words from page 9.

Cloze vocabulary quiz

1. The computer ___ predicts how traffic may flow.

Answer: simulation

2. Water volume was a ___ in every trial.

Answer: constant

3. Bridge ___ balances strength, cost, and safety.

Answer: engineering

4. Record each ___ to the nearest millimeter.

Answer: measurement

5. Route ___ reduced both travel time and fuel use.

Answer: optimization

Page 10: words 226–250

Vocabulary page 10
#	Word	Details	Meaning	Sample sentence
226	input	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: input is the dictionary headword; compare its inflected or derived forms in context.	information, energy, or material entering a system	The microphone converts sound input into an electrical signal.
227	output	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: output is the dictionary headword; compare its inflected or derived forms in context.	information, energy, or material produced by a system	The screen displays the sensor's output as a graph.
228	sensor	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: sensor is the dictionary headword; compare its inflected or derived forms in context.	a device that detects and measures a physical condition	A light sensor turns the lamp on at dusk.
229	robotics	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: robotics is the dictionary headword; compare its inflected or derived forms in context.	the field concerned with designing and operating robots	Robotics combines programming, mechanics, and electronics.
230	automation	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the use of machines or software to perform tasks automatically	Automation allows the greenhouse to adjust watering overnight.
231	hydroelectric	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: hydroelectric is the dictionary headword; compare its inflected or derived forms in context.	producing electricity from moving water	The hydroelectric station uses falling water to turn turbines.
232	solar	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: solar is the dictionary headword; compare its inflected or derived forms in context.	related to or powered by the Sun	A solar cooker concentrates sunlight to heat food.
233	geothermal	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: geothermal is the dictionary headword; compare its inflected or derived forms in context.	related to heat from within Earth	The town uses geothermal energy from underground hot water.
234	turbine	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: turbine is the dictionary headword; compare its inflected or derived forms in context.	a machine with blades turned by moving fluid or gas	Steam spins the turbine inside the power plant.
235	generator	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: generator is the dictionary headword; compare its inflected or derived forms in context.	a machine that converts motion into electrical energy	The bicycle generator powers the headlamp.
236	antidote	noun Study Field: Grade 7 science and engineering word Word study: Base-form focus: antidote is the dictionary headword; compare its inflected or derived forms in context.	a substance that counteracts a particular poison	Doctors administered the antidote soon after identifying the toxin.
237	malfunction	noun Study Field: Grade 7 science and engineering word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a failure to operate correctly	A sensor malfunction caused the false alarm.
238	auditory	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: auditory is the dictionary headword; compare its inflected or derived forms in context.	related to hearing	The auditory nerve carries signals from the inner ear.
239	inaudible	adjective Study Field: Grade 7 science and engineering word Word study: Suffix focus: -ible means capable of, suitable for, or able to be affected.	too quiet to be heard	The bat's highest calls are inaudible to human ears.
240	propel	verb Study Field: Grade 7 science and engineering word Word study: Base-form focus: propel is the dictionary headword; compare its inflected or derived forms in context.	to push or drive something forward	Expelled air can propel the balloon across the room.
241	saturate	verb Study Field: Grade 7 science and engineering word Word study: Base-form focus: saturate is the dictionary headword; compare its inflected or derived forms in context.	to fill a substance completely so it cannot absorb more	Continued rain will saturate the soil.
242	lethal	adjective Study Field: Grade 7 science and engineering word Word study: Base-form focus: lethal is the dictionary headword; compare its inflected or derived forms in context.	capable of causing death	Even a small dose of the chemical can be lethal to fish.
243	rational	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: rational is the dictionary headword; compare its inflected or derived forms in context.	expressible as a ratio of two integers	The decimal 0.75 is rational because it equals three fourths.
244	positive	adjective Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	greater than zero	A positive number appears to the right of zero on a number line.
245	term	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: term is the dictionary headword; compare its inflected or derived forms in context.	a number, variable, or product separated within an expression	The expression has three terms, and each term is separated by a plus sign.
246	substitute	verb Study Field: Grade 7 mathematics and data word Word study: Base-form focus: substitute is the dictionary headword; compare its inflected or derived forms in context.	to replace a variable with a known value	Substitute six for x before simplifying the expression.
247	difference	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	the result of subtracting one quantity from another	The difference between twenty and thirteen is seven.
248	percent	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: percent is the dictionary headword; compare its inflected or derived forms in context.	a ratio or amount out of one hundred	Twenty-five percent is equivalent to one fourth.
249	theoretical	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: theoretical is the dictionary headword; compare its inflected or derived forms in context.	based on expected mathematical reasoning rather than observed trials	The theoretical probability of rolling a six is one sixth.
250	experimental	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: experimental is the dictionary headword; compare its inflected or derived forms in context.	based on results collected from actual trials	Our experimental probability changed as we repeated the toss.

A Rescue Robot

Reading practice for pages 10–12. Five relevant words are highlighted.

English reading

The robotics team designs a machine for flooded buildings. A water sensor warns when soaked floors begin to saturate its wheels. Small fans propel the robot around obstacles so rescuers can inspect a room without entering a potentially lethal space.

Reading comprehension

1. What does the sensor detect?

The sensor detects water.

2. What can saturate the wheels?

Floodwater can saturate the wheels.

3. Why might the robot enter first?

It can inspect a potentially lethal space safely.

Cloze vocabulary quiz

1. Expelled air can ___ the balloon across the room.

Answer: propel

2. A light ___ turns the lamp on at dusk.

Answer: sensor

3. Continued rain will ___ the soil.

Answer: saturate

4. ___ combines programming, mechanics, and electronics.

Answer: robotics

5. Even a small dose of the chemical can be ___ to fish.

Answer: lethal

Page 11: words 251–275

Vocabulary page 11
#	Word	Details	Meaning	Sample sentence
251	statistics	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: statistics is the dictionary headword; compare its inflected or derived forms in context.	the study of collecting, organizing, and interpreting numerical data	Statistics can reveal patterns that individual values do not show.
252	random	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: random is the dictionary headword; compare its inflected or derived forms in context.	chosen by chance so each eligible result has a fair opportunity	A random sample reduces the influence of personal choice.
253	biased	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: biased is the dictionary headword; compare its inflected or derived forms in context.	systematically favoring some outcomes or groups over others	A biased question can distort survey results.
254	percentile	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: percentile is the dictionary headword; compare its inflected or derived forms in context.	a value indicating the percentage of data at or below it	A score in the eightieth percentile equals or exceeds eighty percent of scores.
255	distribution	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	the way data values are spread across possible results	The distribution has two clusters and one distant outlier.
256	histogram	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: histogram is the dictionary headword; compare its inflected or derived forms in context.	a graph using adjacent bars to show frequencies within intervals	The histogram groups heights into five-centimeter intervals.
257	scatterplot	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: scatterplot is the dictionary headword; compare its inflected or derived forms in context.	a graph of paired numerical data shown as points	The scatterplot suggests that study time and scores rise together.
258	correlation	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	a relationship in which two variables tend to change together	A correlation does not by itself prove that one variable causes the other.
259	trend	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: trend is the dictionary headword; compare its inflected or derived forms in context.	a general direction or pattern in data	The graph shows an upward trend in average temperature.
260	slope	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: slope is the dictionary headword; compare its inflected or derived forms in context.	the rate at which a line rises or falls compared with horizontal change	The line's slope is two because y rises two units for every unit of x.
261	linear	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: linear is the dictionary headword; compare its inflected or derived forms in context.	forming a straight-line pattern with a constant rate of change	A linear relationship adds the same amount at each step.
262	nonlinear	adjective Study Field: Grade 7 mathematics and data word Word study: Prefix focus: non- means not or without.	not forming a straight-line pattern or constant rate of change	The curved graph represents a nonlinear relationship.
263	dependent	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: dependent is the dictionary headword; compare its inflected or derived forms in context.	describing a variable whose value changes in response to another	Plant height is the dependent variable in the experiment.
264	domain	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: domain is the dictionary headword; compare its inflected or derived forms in context.	the set of allowable input values for a relation or function	Negative numbers are outside the domain when x represents elapsed time.
265	geometry	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: geometry is the dictionary headword; compare its inflected or derived forms in context.	the branch of mathematics concerning shapes, measurements, and space	Geometry helps architects calculate angles and areas.
266	point	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: point is the dictionary headword; compare its inflected or derived forms in context.	an exact location in space with no length, width, or height	Label the point where the two lines intersect.
267	plane	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: plane is the dictionary headword; compare its inflected or derived forms in context.	a flat surface extending without end in all directions	Three noncollinear points determine a plane.
268	segment	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: segment is the dictionary headword; compare its inflected or derived forms in context.	part of a line bounded by two endpoints	Measure the segment from A to B.
269	ray	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: ray is the dictionary headword; compare its inflected or derived forms in context.	part of a line with one endpoint extending forever in one direction	Each side of an angle is a ray extending from the vertex.
270	obtuse	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: obtuse is the dictionary headword; compare its inflected or derived forms in context.	describing an angle greater than ninety degrees but less than one hundred eighty	The open book forms an obtuse angle.
271	complementary	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: complementary is the dictionary headword; compare its inflected or derived forms in context.	describing two angles whose measures add to ninety degrees	Angles of thirty and sixty degrees are complementary.
272	supplementary	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: supplementary is the dictionary headword; compare its inflected or derived forms in context.	describing two angles whose measures add to one hundred eighty degrees	The adjacent angles on a straight line are supplementary.
273	vertical	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: vertical is the dictionary headword; compare its inflected or derived forms in context.	describing opposite angles formed by two intersecting lines	Vertical angles always have equal measures.
274	transversal	noun Study Field: Grade 7 mathematics and data word Word study: Prefix focus: trans- means across, through, or beyond.	a line crossing two or more other lines	The transversal creates corresponding angles at both intersections.
275	congruent	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: congruent is the dictionary headword; compare its inflected or derived forms in context.	having exactly the same size and shape	The two triangles are congruent because all corresponding sides and angles match.

Page 11 vocabulary review

Review five selected words from page 11.

Cloze vocabulary quiz

1. A ___ question can distort survey results.

Answer: biased

2. Label the ___ where the two lines intersect.

Answer: point

3. A score in the eightieth ___ equals or exceeds eighty percent of scores.

Answer: percentile

4. Three noncollinear points determine a ___.

Answer: plane

5. The ___ has two clusters and one distant outlier.

Answer: distribution

Page 12: words 276–300

Vocabulary page 12
#	Word	Details	Meaning	Sample sentence
276	similar	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: similar is the dictionary headword; compare its inflected or derived forms in context.	having the same shape with proportional corresponding lengths	The similar rectangles have different sizes but equal angle measures.
277	translation	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	a transformation that slides every point the same distance and direction	The translation moves the triangle four units to the right.
278	dilation	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a transformation that enlarges or reduces a figure by a scale factor	A dilation with a factor of two doubles every length.
279	quadrilateral	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: quadrilateral is the dictionary headword; compare its inflected or derived forms in context.	a polygon with four sides	A kite is a quadrilateral with two pairs of adjacent equal sides.
280	square	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: square is the dictionary headword; compare its inflected or derived forms in context.	a quadrilateral with four equal sides and four right angles	The square has both rectangle and rhombus properties.
281	parallelogram	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: parallelogram is the dictionary headword; compare its inflected or derived forms in context.	a quadrilateral with two pairs of parallel opposite sides	Opposite angles of a parallelogram are congruent.
282	pentagon	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: pentagon is the dictionary headword; compare its inflected or derived forms in context.	a polygon with five sides	The irregular pentagon still has exactly five sides.
283	hexagon	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: hexagon is the dictionary headword; compare its inflected or derived forms in context.	a polygon with six sides	A regular hexagon can be divided into six equilateral triangles.
284	octagon	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: octagon is the dictionary headword; compare its inflected or derived forms in context.	a polygon with eight sides	The stop sign has the shape of a regular octagon.
285	circle	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: circle is the dictionary headword; compare its inflected or derived forms in context.	the set of points in a plane equally distant from one center	Every radius of the circle has the same length.
286	pi	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: pi is the dictionary headword; compare its inflected or derived forms in context.	the constant ratio of a circle's circumference to its diameter	Use pi to calculate the circumference from the diameter.
287	prism	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: prism is the dictionary headword; compare its inflected or derived forms in context.	a solid with two congruent parallel bases joined by faces	The triangular prism has two triangular bases.
288	pyramid	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: pyramid is the dictionary headword; compare its inflected or derived forms in context.	a solid with one polygon base and triangular faces meeting at a vertex	The square pyramid has four triangular side faces.
289	cylinder	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: cylinder is the dictionary headword; compare its inflected or derived forms in context.	a solid with two congruent circular bases connected by a curved surface	The can is approximately a cylinder.
290	cone	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: cone is the dictionary headword; compare its inflected or derived forms in context.	a solid with one circular base tapering to a single vertex	The traffic cone has a circular base.
291	sphere	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: sphere is the dictionary headword; compare its inflected or derived forms in context.	a solid whose surface points are all equally distant from its center	A basketball approximates a sphere.
292	theorem	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: theorem is the dictionary headword; compare its inflected or derived forms in context.	a mathematical statement proved from definitions and accepted facts	The Pythagorean theorem relates the sides of a right triangle.
293	postulate	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: postulate is the dictionary headword; compare its inflected or derived forms in context.	a basic mathematical statement accepted without proof	The postulate states that exactly one line passes through two points.
294	deduction	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a conclusion reached by applying rules to known facts	Her deduction follows from the angle-sum theorem.
295	induction	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	reasoning that forms a general rule from repeated examples	Induction suggests the pattern, but a proof must confirm it.
296	counterexample	noun Study Field: Grade 7 mathematics and data word Word study: Prefix focus: counter- means against, opposing, or responding to.	one example showing that a general statement is false	The fraction one half is a counterexample to the claim that all numbers below one are negative.
297	calculation	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	a numerical process used to find an answer	Check the calculation by estimating the result first.
298	mixed	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: mixed is the dictionary headword; compare its inflected or derived forms in context.	describing a number made of a whole number and a proper fraction	The mixed number two and one third equals seven thirds.
299	improper	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: improper is the dictionary headword; compare its inflected or derived forms in context.	describing a fraction whose numerator is at least as large as its denominator	The improper fraction nine fourths is greater than one.
300	terminating	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: terminating is the dictionary headword; compare its inflected or derived forms in context.	describing a decimal that ends after a finite number of digits	One eighth has the terminating decimal 0.125.

Page 12 vocabulary review

Review five selected words from page 12.

Cloze vocabulary quiz

1. A ___ with a factor of two doubles every length.

Answer: dilation

2. A basketball approximates a ___.

Answer: sphere

3. A kite is a ___ with two pairs of adjacent equal sides.

Answer: quadrilateral

4. The Pythagorean ___ relates the sides of a right triangle.

Answer: theorem

5. The ___ has both rectangle and rhombus properties.

Answer: square

Page 13: words 301–325

Vocabulary page 13
#	Word	Details	Meaning	Sample sentence
301	repeating	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: repeating is the dictionary headword; compare its inflected or derived forms in context.	describing a decimal with a digit pattern that continues forever	One third has the repeating decimal 0.333.
302	conversion	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	the process of changing a value into another equivalent form or unit	The conversion from meters to centimeters multiplies the value by one hundred.
303	metric	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: metric is the dictionary headword; compare its inflected or derived forms in context.	related to a decimal measurement system based on powers of ten	The metric unit for liquid volume is the liter.
304	customary	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: customary is the dictionary headword; compare its inflected or derived forms in context.	related to the measurement units commonly used in the United States	In the customary system, twelve inches equal one foot.
305	formula	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: formula is the dictionary headword; compare its inflected or derived forms in context.	a rule written with symbols for calculating a quantity	The formula gives the area of a triangle.
306	computation	noun Study Field: Grade 7 mathematics and data word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the act or result of calculating with numbers	A calculator can speed the computation but cannot choose the correct method.
307	arithmetic	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: arithmetic is the dictionary headword; compare its inflected or derived forms in context.	mathematics involving basic operations with numbers	Mental arithmetic helps estimate a grocery total.
308	algebra	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: algebra is the dictionary headword; compare its inflected or derived forms in context.	mathematics using symbols to represent numbers and relationships	Algebra can express the same pattern for any input.
309	statistic	noun Study Field: Grade 7 mathematics and data word Word study: Base-form focus: statistic is the dictionary headword; compare its inflected or derived forms in context.	a numerical fact calculated from a set of data	The median is a statistic describing the center of a dataset.
310	mathematical	adjective Study Field: Grade 7 mathematics and data word Word study: Base-form focus: mathematical is the dictionary headword; compare its inflected or derived forms in context.	related to numbers, quantities, patterns, or logical calculation	The puzzle requires mathematical reasoning rather than guessing.
311	belief	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: belief is the dictionary headword; compare its inflected or derived forms in context.	an idea accepted as true or worthy of trust	Freedom of conscience protects each person's belief.
312	norm	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: norm is the dictionary headword; compare its inflected or derived forms in context.	a shared expectation about behavior within a group	Greeting visitors politely is a social norm in many communities.
313	institution	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	an established organization or system serving a public purpose	A court is an institution that applies and interprets law.
314	religion	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: religion is the dictionary headword; compare its inflected or derived forms in context.	an organized system of beliefs and practices concerning spiritual life	The constitution protects a person's right to practice a religion.
315	language	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: language is the dictionary headword; compare its inflected or derived forms in context.	a system of words, signs, and rules used for communication	Migration can bring a new language into a region.
316	art	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: art is the dictionary headword; compare its inflected or derived forms in context.	creative expression through visual, musical, literary, or performing forms	Public art can preserve community memory.
317	surplus	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: surplus is the dictionary headword; compare its inflected or derived forms in context.	an amount remaining after needs have been met	A food surplus allowed some workers to specialize in other trades.
318	specialization	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	concentration on a particular job, product, or field	Craft specialization increased as ancient cities grew.
319	artisan	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: artisan is the dictionary headword; compare its inflected or derived forms in context.	a skilled worker who makes things by hand	The artisan shaped clay into durable storage jars.
320	merchant	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: merchant is the dictionary headword; compare its inflected or derived forms in context.	a person who buys and sells goods	The merchant carried spices between coastal ports.
321	barter	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: barter is the dictionary headword; compare its inflected or derived forms in context.	exchange of goods or services without using money	Through barter, a farmer traded grain for tools.
322	entrepreneurship	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: entrepreneurship is the dictionary headword; compare its inflected or derived forms in context.	the activity of starting and managing a business while accepting risk	Her entrepreneurship turned a repair idea into a small company.
323	revenue	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: revenue is the dictionary headword; compare its inflected or derived forms in context.	income received by a government or organization	Ticket revenue pays for museum conservation.
324	debt	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: debt is the dictionary headword; compare its inflected or derived forms in context.	money, goods, or services owed to another party	The city repaid its construction debt over twenty years.
325	credit	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: credit is the dictionary headword; compare its inflected or derived forms in context.	an arrangement allowing payment later for goods or money received now	Responsible use of credit requires a plan for repayment.

Converting Measurements

Reading practice for pages 13–15. Five relevant words are highlighted.

English reading

A recipe uses customary cups, but the laboratory scale uses metric units. Imani applies a conversion formula and sees a repeating decimal on her calculator. She rounds only after checking how much precision the experiment requires.

Reading comprehension

1. Which units does the recipe use?

The recipe uses customary units.

2. Which units does the scale use?

The scale uses metric units.

3. Why does Imani use a formula?

She uses it for unit conversion.

Page 14: words 326–350

Vocabulary page 14
#	Word	Details	Meaning	Sample sentence
326	interest	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: interest is the dictionary headword; compare its inflected or derived forms in context.	money paid for the use of borrowed funds	The loan's interest increases its total cost.
327	recession	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	a period of significant decline in economic activity	During the recession, many businesses reduced hiring.
328	unemployment	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	the condition of people seeking work but unable to find it	The factory closure caused unemployment to rise.
329	manufacturing	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: manufacturing is the dictionary headword; compare its inflected or derived forms in context.	the large-scale production of goods using labor and machines	Automobile manufacturing supports many related industries.
330	investment	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	money or resources committed in hopes of future benefit	The railway was a major public investment.
331	wealth	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: wealth is the dictionary headword; compare its inflected or derived forms in context.	a large amount of valuable property or resources	Trade created wealth for the port but did not benefit every resident equally.
332	poverty	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: poverty is the dictionary headword; compare its inflected or derived forms in context.	the condition of lacking enough resources for basic needs	The relief program seeks to reduce childhood poverty.
333	public	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: public is the dictionary headword; compare its inflected or derived forms in context.	owned, provided, or used by the community or government	The public library is supported by local taxes.
334	private	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: private is the dictionary headword; compare its inflected or derived forms in context.	owned by individuals or organizations rather than the government	The farm is private property, although a public path crosses it.
335	monarchy	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: monarchy is the dictionary headword; compare its inflected or derived forms in context.	a government headed by a hereditary king or queen	The monarchy became largely ceremonial after constitutional reforms.
336	dictatorship	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: dictatorship is the dictionary headword; compare its inflected or derived forms in context.	a government in which one ruler or small group holds unchecked power	The dictatorship censored newspapers and arrested opponents.
337	oligarchy	noun Study Field: Grade 7 history and civics word Word study: Root and suffix focus: -archy relates to rule, rank, or a governing system.	a government controlled by a small powerful group	Wealthy families dominated the ancient oligarchy.
338	theocracy	noun Study Field: Grade 7 history and civics word Word study: Root and suffix focus: -cracy relates to rule or a system of government.	a government ruled by religious authorities or religious law	In a theocracy, religious leadership also controls political authority.
339	judiciary	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: judiciary is the dictionary headword; compare its inflected or derived forms in context.	the branch of government made up of courts and judges	An independent judiciary can limit abuses of power.
340	liberty	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: liberty is the dictionary headword; compare its inflected or derived forms in context.	freedom to act, think, or speak within the protection of law	The charter promises liberty of expression.
341	equality	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	the condition of having the same rights, status, or opportunities	The amendment advanced legal equality.
342	nationalism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	strong identification with and support for a nation	Nationalism helped unite the region but also heightened rivalries.
343	patriotism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	devotion to one's country and concern for its well-being	Her patriotism included criticizing policies she believed were unjust.
344	protest	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: protest is the dictionary headword; compare its inflected or derived forms in context.	an organized expression of opposition or objection	The peaceful protest called for safer working conditions.
345	strike	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: strike is the dictionary headword; compare its inflected or derived forms in context.	an organized refusal by workers to work in order to press demands	The strike ended after employers agreed to negotiate.
346	suffrage	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: suffrage is the dictionary headword; compare its inflected or derived forms in context.	the right to vote in political elections	Activists campaigned for universal suffrage.
347	party	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: party is the dictionary headword; compare its inflected or derived forms in context.	an organized political group sharing goals or policies	The new party focused its campaign on housing reform.
348	minority	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	a group smaller in number or holding less political power	The constitution protects minority rights against majority abuse.
349	representation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the act of speaking or acting on behalf of others in government	Residents demanded fair representation on the regional council.
350	district	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: district is the dictionary headword; compare its inflected or derived forms in context.	an area established for government, elections, or administration	Each district elects one council member.

Page 15: words 351–375

Vocabulary page 15
#	Word	Details	Meaning	Sample sentence
351	census	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: census is the dictionary headword; compare its inflected or derived forms in context.	an official count and description of a population	The census records population changes every ten years.
352	ordinance	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	a law or rule adopted by a local government	The city ordinance limits noise after midnight.
353	war	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: war is the dictionary headword; compare its inflected or derived forms in context.	organized armed conflict between states or groups	The war displaced millions of civilians.
354	peace	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: peace is the dictionary headword; compare its inflected or derived forms in context.	a condition without war or violent conflict	The treaty created a fragile peace.
355	truce	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: truce is the dictionary headword; compare its inflected or derived forms in context.	a temporary agreement to stop fighting	Both sides accepted a truce to evacuate the wounded.
356	armistice	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: armistice is the dictionary headword; compare its inflected or derived forms in context.	a formal agreement to stop armed conflict	The armistice ended the fighting before a final treaty was signed.
357	migration	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	movement of people or animals from one region to another	Seasonal jobs encouraged migration toward the coast.
358	immigration	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	movement into a country to settle there	Immigration changed the city's languages, foods, and industries.
359	emigration	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	movement out of a country to settle elsewhere	Political persecution caused widespread emigration.
360	refugee	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: refugee is the dictionary headword; compare its inflected or derived forms in context.	a person forced to leave home because of war, danger, or persecution	The refugee applied for protection after crossing the border.
361	diaspora	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: diaspora is the dictionary headword; compare its inflected or derived forms in context.	a population dispersed from an ancestral homeland	Letters connected members of the diaspora across several continents.
362	urban	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: urban is the dictionary headword; compare its inflected or derived forms in context.	related to a city or densely populated area	Urban planners proposed more parks near apartment buildings.
363	rural	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: rural is the dictionary headword; compare its inflected or derived forms in context.	related to the countryside or areas with low population density	The rural clinic serves farms spread across a large county.
364	suburban	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: suburban is the dictionary headword; compare its inflected or derived forms in context.	related to residential areas around a city	A new rail line connected the suburban community to downtown.
365	geography	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: geography is the dictionary headword; compare its inflected or derived forms in context.	the study of places, environments, and relationships across Earth's surface	Geography explains how rivers shaped the settlement pattern.
366	equator	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: equator is the dictionary headword; compare its inflected or derived forms in context.	the imaginary line around Earth's middle at zero degrees latitude	The equator passes through parts of South America, Africa, and Asia.
367	meridian	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: meridian is the dictionary headword; compare its inflected or derived forms in context.	an imaginary north-south line used to measure longitude	The prime meridian is assigned zero degrees longitude.
368	projection	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	a method of representing Earth's curved surface on a flat map	Every map projection distorts some combination of area, shape, or distance.
369	elevation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	height above a reference level, usually sea level	The mountain town has an elevation of two thousand meters.
370	assimilation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the process of adopting the dominant culture while losing some distinct traits	Forced assimilation policies suppressed Indigenous languages.
371	acculturation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	cultural change resulting from sustained contact between groups	Acculturation can involve exchange without complete loss of identity.
372	diversity	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	the presence of many different identities, experiences, or forms	Linguistic diversity reflects the region's migration history.
373	ethnicity	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	identity connected to shared ancestry, culture, language, or history	The census asks about ethnicity separately from citizenship.
374	gender	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: gender is the dictionary headword; compare its inflected or derived forms in context.	social and personal identity related to being male, female, both, neither, or another identity	Ideas about gender roles vary across societies and time.
375	identity	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	the qualities, affiliations, and experiences that shape who someone is	Language became an important part of the community's identity.

Page 16: words 376–400

Vocabulary page 16
#	Word	Details	Meaning	Sample sentence
376	archaeology	noun Study Field: Grade 7 history and civics word Word study: Root and suffix focus: -logy means the study of a subject.	the study of past human life through material remains	Archaeology revealed workshops beneath the modern marketplace.
377	chronology	noun Study Field: Grade 7 history and civics word Word study: Root and suffix focus: -logy means the study of a subject.	the arrangement of events in time order	The timeline establishes the chronology of the revolution.
378	era	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: era is the dictionary headword; compare its inflected or derived forms in context.	a long period identified by particular events or features	The invention marked the beginning of a new era in communication.
379	decade	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: decade is the dictionary headword; compare its inflected or derived forms in context.	a period of ten years	The city's population doubled within one decade.
380	medieval	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: medieval is the dictionary headword; compare its inflected or derived forms in context.	related to the European Middle Ages or a comparable historical period	The medieval manuscript was copied by hand.
381	contemporary	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: contemporary is the dictionary headword; compare its inflected or derived forms in context.	belonging to the present time or the same historical period	Contemporary accounts describe how residents experienced the flood.
382	throne	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: throne is the dictionary headword; compare its inflected or derived forms in context.	the position or authority of a monarch	The prince renounced the throne and left the kingdom.
383	feudalism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a social and political system based on landholding and obligations between ranks	Under feudalism, land and service connected lords and vassals.
384	renaissance	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	a period of renewed cultural or intellectual activity	The Harlem Renaissance transformed American literature, music, and art.
385	reformation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	a major movement to change and reform an established institution	The Protestant Reformation divided western Christianity.
386	enlightenment	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	an intellectual movement emphasizing reason, evidence, and individual rights	Enlightenment thinkers debated the source of government authority.
387	industrialization	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	the development of machine-based manufacturing and factory production	Industrialization drew workers into rapidly growing cities.
388	colonization	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	the process of establishing control and settlement over another territory	Colonization disrupted existing governments and trade networks.
389	abolition	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ition commonly forms a noun naming an action, process, or result.	the official ending of a law, practice, or institution	The movement demanded the abolition of slavery.
390	emancipation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the act of freeing people from legal, political, or social control	The proclamation made emancipation a central aim of the war.
391	reconstruction	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	the process of rebuilding a society or region after destruction or political change	Postwar reconstruction restored roads and created new institutions.
392	communism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a system seeking common ownership of major resources and a classless society	Different governments interpreted communism in sharply different ways.
393	capitalism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	an economic system based mainly on private ownership and market exchange	In capitalism, businesses usually compete to sell goods and services.
394	socialism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a system favoring social or public control of major resources and services	The party promoted democratic socialism through elections.
395	fascism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	an authoritarian nationalist ideology that suppresses opposition and democratic rights	Fascism gained power by exploiting fear and political violence.
396	totalitarianism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	a system in which the state seeks control over nearly every part of life	The novel portrays totalitarianism through surveillance and forced loyalty.
397	censorship	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: censorship is the dictionary headword; compare its inflected or derived forms in context.	the suppression or restriction of speech, media, or information	Government censorship prevented the newspaper from reporting the protest.
398	genocide	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: genocide is the dictionary headword; compare its inflected or derived forms in context.	the intentional destruction, in whole or part, of a national, ethnic, racial, or religious group	The museum documents the genocide through survivor testimony.
399	discrimination	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	unfair treatment based on identity or group membership	The law prohibits employment discrimination.
400	segregation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the enforced separation of groups in public or social life	Students challenged school segregation in court.

Building a Historical Chronology

Reading practice for pages 16–18. Five relevant words are highlighted.

English reading

Evidence from archaeology helps students build a chronology of the town. One coin comes from a medieval era, while a photograph belongs to a much later decade. Placing each object in time reveals how daily life changed.

Reading comprehension

1. What helps students build the chronology?

Evidence from archaeology helps them.

2. Which object is medieval?

A coin is from the medieval era.

3. What does the timeline reveal?

It reveals changes in daily life.

Page 17: words 401–425

Vocabulary page 17
#	Word	Details	Meaning	Sample sentence
401	integration	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the process of bringing previously separated groups into equal participation	School integration faced organized resistance.
402	civil	adjective Study Field: Grade 7 history and civics word Word study: Base-form focus: civil is the dictionary headword; compare its inflected or derived forms in context.	related to citizens, society, or nonmilitary public life	The civil rights movement used courts, boycotts, and marches.
403	activism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	organized action intended to produce social or political change	Youth activism helped expand access to public transportation.
404	charity	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	an organization or action that provides help to people in need	The charity supplies meals during emergencies.
405	nonprofit	noun Study Field: Grade 7 history and civics word Word study: Prefix focus: non- means not or without.	an organization that uses its income to pursue a mission rather than pay owners	The nonprofit restored the historic theater.
406	transportation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the movement of people or goods between places	Reliable transportation connects workers with jobs.
407	sanitation	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	systems and practices that protect health through cleanliness and waste control	Modern sanitation reduced diseases spread by contaminated water.
408	education	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	the process and system of teaching and learning	Public education expanded during the nineteenth century.
409	housing	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: housing is the dictionary headword; compare its inflected or derived forms in context.	homes considered as a social need or economic sector	Rising rents created a shortage of affordable housing.
410	development	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	planned economic, social, or physical growth and change	The council debated whether the development would damage the wetland.
411	globalization	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	growing connection among countries through trade, communication, and culture	Globalization allows products to cross several borders before sale.
412	interdependence	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	a relationship in which people or systems rely on one another	Trade creates interdependence among producers, workers, and consumers.
413	media	noun Study Field: Grade 7 history and civics word Word study: Base-form focus: media is the dictionary headword; compare its inflected or derived forms in context.	channels and organizations that communicate information to large audiences	Digital media can spread both verified reports and rumors rapidly.
414	journalism	noun Study Field: Grade 7 history and civics word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	the work of gathering, verifying, and reporting news	Responsible journalism separates confirmed facts from speculation.
415	agile	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: agile is the dictionary headword; compare its inflected or derived forms in context.	able to move or think quickly and easily	The agile goalkeeper changed direction in an instant.
416	trivial	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: trivial is the dictionary headword; compare its inflected or derived forms in context.	too minor or unimportant to deserve much attention	A spelling preference is trivial compared with a factual error.
417	naive	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: naive is the dictionary headword; compare its inflected or derived forms in context.	lacking experience or showing overly simple trust	It was naive to believe the advertisement without checking its claims.
418	wholehearted	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: wholehearted is the dictionary headword; compare its inflected or derived forms in context.	showing complete sincerity and enthusiasm	The proposal received wholehearted support from the volunteers.
419	exotic	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: exotic is the dictionary headword; compare its inflected or derived forms in context.	unusual because it comes from a distant or unfamiliar place	The greenhouse protects exotic plants from the winter cold.
420	neglected	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: neglected is the dictionary headword; compare its inflected or derived forms in context.	not receiving necessary care or attention	Volunteers repaired the neglected playground.
421	resigned	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: resigned is the dictionary headword; compare its inflected or derived forms in context.	accepting an unwanted situation because change seems impossible	She sounded resigned after the final appeal was denied.
422	passive	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	not taking action or exerting influence	A passive observer watches the problem without helping to solve it.
423	drab	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: drab is the dictionary headword; compare its inflected or derived forms in context.	dull in color or appearance	Bright murals transformed the drab concrete wall.
424	hardy	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: hardy is the dictionary headword; compare its inflected or derived forms in context.	strong enough to survive difficult conditions	The hardy shrub survives cold winds and poor soil.
425	wily	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: wily is the dictionary headword; compare its inflected or derived forms in context.	clever at gaining an advantage, often through tricks	The wily fox circles downwind before approaching.

Page 18: words 426–450

Vocabulary page 18
#	Word	Details	Meaning	Sample sentence
426	illegible	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ible means capable of, suitable for, or able to be affected.	impossible or very difficult to read	Rain made the ink on the label illegible.
427	incompetent	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: incompetent is the dictionary headword; compare its inflected or derived forms in context.	lacking the skill needed to perform a task properly	An incompetent repair could make the electrical fault more dangerous.
428	disoriented	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: disoriented is the dictionary headword; compare its inflected or derived forms in context.	confused about direction, place, or situation	The hiker felt disoriented after fog covered the trail markers.
429	momentary	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: momentary is the dictionary headword; compare its inflected or derived forms in context.	lasting for only a very short time	A momentary power loss reset the clock.
430	ominous	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	suggesting that something harmful may happen	The sudden silence was an ominous sign of the approaching storm.
431	tranquil	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: tranquil is the dictionary headword; compare its inflected or derived forms in context.	calm, quiet, and free from disturbance	At dawn, the lake looked tranquil and glassy.
432	exuberant	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: exuberant is the dictionary headword; compare its inflected or derived forms in context.	full of lively energy and excitement	The exuberant dancers filled the stage with motion.
433	perilous	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	full of serious danger	Icy ledges made the ascent perilous.
434	ravenous	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	extremely hungry	After the long hike, everyone was ravenous.
435	desolate	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: desolate is the dictionary headword; compare its inflected or derived forms in context.	empty, lonely, and lacking comfort or life	Abandoned houses made the mining town seem desolate.
436	nimble	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: nimble is the dictionary headword; compare its inflected or derived forms in context.	quick and light in movement or thought	Her nimble fingers repaired the tiny clockwork mechanism.
437	defiant	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: defiant is the dictionary headword; compare its inflected or derived forms in context.	openly resisting authority or expectation	The defiant witness refused to repeat the false statement.
438	intimidated	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: intimidated is the dictionary headword; compare its inflected or derived forms in context.	frightened or made less confident by pressure	The new speaker felt intimidated by the enormous audience.
439	grave	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: grave is the dictionary headword; compare its inflected or derived forms in context.	very serious and worthy of concern	The doctor warned that the infection posed a grave danger.
440	docile	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: docile is the dictionary headword; compare its inflected or derived forms in context.	calm and easy to guide or control	The usually wild horse became docile around its trusted handler.
441	despicable	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -able means capable of, suitable for, or worthy of an action.	deserving strong dislike because of cruel or dishonorable behavior	Stealing emergency supplies was a despicable act.
442	lamentable	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -able means capable of, suitable for, or worthy of an action.	unfortunate and deserving regret	The archive's poor storage was a lamentable failure of planning.
443	lofty	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: lofty is the dictionary headword; compare its inflected or derived forms in context.	very high or expressing noble ambitions	The organization set a lofty goal of ending local homelessness.
444	distinctive	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	clearly different and easy to recognize	The bird's distinctive call begins with three short notes.
445	shrewd	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: shrewd is the dictionary headword; compare its inflected or derived forms in context.	showing sharp practical judgment	The shrewd negotiator recognized which terms mattered most.
446	prosperous	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	successful and financially secure	The prosperous port attracted merchants from distant regions.
447	unsightly	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: unsightly is the dictionary headword; compare its inflected or derived forms in context.	unpleasant to look at	The builders concealed the unsightly pipes behind a panel.
448	offensive	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	causing anger, hurt, or disgust	The editor removed an offensive stereotype from the advertisement.
449	raucous	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	harsh, loud, and disorderly	A raucous cheer erupted after the final goal.
450	dejected	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: dejected is the dictionary headword; compare its inflected or derived forms in context.	sad and discouraged	The dejected team congratulated its opponents despite the loss.

Page 19: words 451–475

Vocabulary page 19
#	Word	Details	Meaning	Sample sentence
451	symmetrical	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: symmetrical is the dictionary headword; compare its inflected or derived forms in context.	having matching parts arranged around a center or line	The butterfly's wings form a nearly symmetrical pattern.
452	potent	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: potent is the dictionary headword; compare its inflected or derived forms in context.	having strong power or effect	The concentrated cleaner is potent enough to damage paint.
453	uncanny	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: uncanny is the dictionary headword; compare its inflected or derived forms in context.	strangely unusual in a way that causes unease	The twins had an uncanny ability to finish each other's sentences.
454	enticing	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: enticing is the dictionary headword; compare its inflected or derived forms in context.	attractive enough to create a strong desire	The bakery's warm aroma was enticing.
455	rash	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: rash is the dictionary headword; compare its inflected or derived forms in context.	done too quickly without considering danger or consequences	Crossing the flooded bridge would be a rash decision.
456	hostile	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: hostile is the dictionary headword; compare its inflected or derived forms in context.	unfriendly, opposed, or dangerous	Few plants can survive the crater's hostile conditions.
457	tactful	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: tactful is the dictionary headword; compare its inflected or derived forms in context.	careful not to embarrass or offend others	Her tactful correction focused on the error rather than the writer.
458	abrupt	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: abrupt is the dictionary headword; compare its inflected or derived forms in context.	sudden or unexpectedly brief	The road ends at an abrupt drop near the cliff.
459	sober	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: sober is the dictionary headword; compare its inflected or derived forms in context.	serious, calm, and realistic	The report offers a sober assessment of the recovery costs.
460	cheerful	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: cheerful is the dictionary headword; compare its inflected or derived forms in context.	noticeably happy and positive	His cheerful greeting eased everyone's nervousness.
461	skeptical	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: skeptical is the dictionary headword; compare its inflected or derived forms in context.	not easily convinced without evidence	The skeptical reviewer asked to see the original data.
462	doubtful	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: doubtful is the dictionary headword; compare its inflected or derived forms in context.	uncertain or unlikely to be true	It is doubtful that the damaged bridge can reopen today.
463	vain	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: vain is the dictionary headword; compare its inflected or derived forms in context.	too proud of appearance or achievements	The vain ruler ordered statues of himself in every square.
464	proud	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: proud is the dictionary headword; compare its inflected or derived forms in context.	pleased with an achievement or quality	The volunteers felt proud of the garden they had restored.
465	ashamed	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: ashamed is the dictionary headword; compare its inflected or derived forms in context.	feeling guilt or embarrassment about one's behavior	He felt ashamed after admitting that he had lied.
466	remorseful	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: remorseful is the dictionary headword; compare its inflected or derived forms in context.	showing deep regret for wrongdoing	The remorseful driver paid for the damaged fence.
467	resentful	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: resentful is the dictionary headword; compare its inflected or derived forms in context.	feeling bitterness about unfair treatment	Workers became resentful when only managers received credit.
468	sympathetic	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: sympathetic is the dictionary headword; compare its inflected or derived forms in context.	showing concern for another person's difficulty	The counselor was sympathetic but still explained the rule.
469	empathetic	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: empathetic is the dictionary headword; compare its inflected or derived forms in context.	able to understand and share another person's feelings	An empathetic response acknowledges why the loss hurts.
470	apathetic	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: apathetic is the dictionary headword; compare its inflected or derived forms in context.	showing little interest, concern, or emotion	Voters remained apathetic because none of the candidates addressed housing.
471	patient	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: patient is the dictionary headword; compare its inflected or derived forms in context.	able to wait or continue without becoming annoyed	A patient instructor explained the process again.
472	tolerant	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: tolerant is the dictionary headword; compare its inflected or derived forms in context.	willing to respect beliefs or behavior different from one's own	A tolerant community protects peaceful disagreement.
473	obedient	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: obedient is the dictionary headword; compare its inflected or derived forms in context.	willing to follow rules or commands	The obedient dog waited beside the open gate.
474	rebellious	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	resisting control, rules, or authority	The rebellious artist rejected the academy's strict conventions.
475	reckless	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: reckless is the dictionary headword; compare its inflected or derived forms in context.	careless about danger or consequences	Reckless driving endangered everyone near the crossing.

An Uncanny Garden

Reading practice for pages 19–20. Five relevant words are highlighted.

English reading

The garden’s perfectly symmetrical paths look almost uncanny at dusk. An enticing scent comes from white flowers, but their sap contains a potent irritant. Visitors should not make a rash decision to touch an unfamiliar plant.

Reading comprehension

1. Why do the paths look uncanny?

They are perfectly symmetrical at dusk.

2. What is enticing?

The flowers' scent is enticing.

3. Why should visitors avoid a rash choice?

The sap contains a potent irritant.

Page 20: words 476–500

Vocabulary page 20
#	Word	Details	Meaning	Sample sentence
476	timid	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: timid is the dictionary headword; compare its inflected or derived forms in context.	shy or easily frightened	The timid kitten hid behind the chair.
477	valiant	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: valiant is the dictionary headword; compare its inflected or derived forms in context.	showing courage in a difficult situation	The valiant rescue crew entered the flooded tunnel.
478	persistent	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: persistent is the dictionary headword; compare its inflected or derived forms in context.	continuing firmly despite difficulty or delay	Her persistent questions uncovered the accounting error.
479	idle	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: idle is the dictionary headword; compare its inflected or derived forms in context.	not active, working, or in use	The idle factory machinery gathered dust.
480	imaginative	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	showing creativity and original ideas	The imaginative solution reused rainwater to cool the roof.
481	practical	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: practical is the dictionary headword; compare its inflected or derived forms in context.	useful and suited to real conditions	The committee chose a practical repair it could afford.
482	logical	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: logical is the dictionary headword; compare its inflected or derived forms in context.	based on clear and consistent reasoning	The final conclusion is logical because each step follows from evidence.
483	sensible	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ible means capable of, suitable for, or able to be affected.	showing good judgment and awareness of likely results	Bringing extra water was a sensible precaution.
484	probable	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -able means capable of, suitable for, or worthy of an action.	likely to happen or be true	Heavy clouds make rain probable this afternoon.
485	unlikely	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: unlikely is the dictionary headword; compare its inflected or derived forms in context.	not expected to happen or be true	It is unlikely that the small pond caused the regional flood.
486	optional	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: optional is the dictionary headword; compare its inflected or derived forms in context.	available by choice rather than required	The extra research question is optional.
487	voluntary	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: voluntary is the dictionary headword; compare its inflected or derived forms in context.	done by free choice rather than force	Participation in the anonymous survey is voluntary.
488	mandatory	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: mandatory is the dictionary headword; compare its inflected or derived forms in context.	required by a rule or law	Safety goggles are mandatory in the laboratory.
489	temporary	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: temporary is the dictionary headword; compare its inflected or derived forms in context.	lasting for a limited time	A temporary bridge will carry pedestrians during repairs.
490	unstable	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -able means capable of, suitable for, or worthy of an action.	likely to change, collapse, or become dangerous	The cracked slope became unstable after heavy rain.
491	uniform	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: uniform is the dictionary headword; compare its inflected or derived forms in context.	the same throughout or consistent in form	The machine applies a uniform layer of paint.
492	subtle	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: subtle is the dictionary headword; compare its inflected or derived forms in context.	small or delicate but still meaningful	A subtle shift in tone makes the apology sound insincere.
493	obvious	adjective Study Field: Grade 7 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	easy to notice or understand	The missing wheel was the most obvious problem.
494	audible	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: audible is the dictionary headword; compare its inflected or derived forms in context.	loud enough to be heard	The speaker's final words were barely audible.
495	concrete	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: concrete is the dictionary headword; compare its inflected or derived forms in context.	specific, definite, and based on observable details	The proposal needs concrete steps, not general promises.
496	durable	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: durable is the dictionary headword; compare its inflected or derived forms in context.	able to resist wear or damage for a long time	The durable fabric survived years of outdoor use.
497	rigid	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: rigid is the dictionary headword; compare its inflected or derived forms in context.	stiff, inflexible, or unwilling to change	A rigid frame keeps the telescope steady.
498	elastic	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: elastic is the dictionary headword; compare its inflected or derived forms in context.	able to stretch and return to its original shape	The elastic cord lengthened under the load.
499	rough	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: rough is the dictionary headword; compare its inflected or derived forms in context.	having an uneven surface or lacking refinement	The rough stone can scratch polished wood.
500	coarse	adjective Study Field: Grade 7 precise high-utility word Word study: Base-form focus: coarse is the dictionary headword; compare its inflected or derived forms in context.	made of large particles or having a rough texture	The filter catches coarse sand before the water reaches the fine mesh.

Sources and curriculum references

These references guide selection and calibration. Definitions, sample sentences, readings, questions, and teaching notes are independently written and reviewed.