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 201–225 of 500
#	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.

Vocabulary reading and practice

Page 9 vocabulary review

Review five selected words from page 9.

Vocabulary quiz

Complete 5 review questions for this page.

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

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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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