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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Words 151–175 of 500
#	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.	1. mutaatio 2. geenimuutos	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.	1. valinta 2. valitseminen	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.	evoluutio	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.	loissairaus	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.	mutualismi	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.	1. kommensalismi 2. pöytävierassuhde	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.	tuma	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.	1. solulima 2. sytoplasma	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.	1. skeletaalinen 2. luuranko 3. luuranko-	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.	1. lihas- 2. lihas 3. lihaksikas	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.	1. ruoansulatus- 2. digestiivinen 3. ruoansulatus	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.	1. umpirauhanen 2. endokriininen 3. umpirauhas-	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.	1. immuuni 2. koskematon	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.	bakteeri	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.	ravitsemus	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.	1. murrosikä 2. puberteetti 3. varhaismurrosikä	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.	alkio	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.	1. ekologia 2. ympäristötiede	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.	1. saastuminen 2. pilaantuminen 3. saastuttaminen	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.	kide	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.	episentri	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.	seisminen	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.	1. hyökyaalto 2. tsunami	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.	1. troposfääri 2. alailmakehä	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.	stratosfääri	Weather balloons can rise into the stratosphere.

Vocabulary reading and practice

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.

Finnish translation

A reviewed translation is not available for this passage yet.

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.

Vocabulary quiz

Choose the dictionary equivalent for each of 5 selected words.

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Sources and curriculum references

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

7th Grade Vocabulary Words

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