English Vocabulary · Grade 8 Live Review Preview

8th Grade Vocabulary Words

Eighth-grade readers move toward high-school-level analysis across literature, argument, research, physical and life science, algebra, economics, history, and civics. This level strengthens precise Tier II and cross-curricular vocabulary while emphasizing context, analogy, word relationships, Greek and Latin roots, multiple meanings, source judgment, and evidence-based communication.

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 cited Grade 8 resources calibrate difficulty and vocabulary-study skills only; all learner-facing definitions, examples, quizzes, and descriptions are original KSSR copy.

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Words 226–250 of 500
#	Word	Details	Meaning	Sample sentence
226	alkalinity	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	щелочность	Limestone can increase a lake's alkalinity.
227	oxidation	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. окисле́ние 2. оксида́ция	Rust forms through oxidation of iron.
228	reduction	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. уменьше́ние 2. сниже́ние 3. сведе́ние	During reduction, copper ions gain electrons and become copper atoms.
229	combustion	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. возгора́ние 2. горе́ние 3. сгора́ние	Complete combustion of the fuel produces carbon dioxide and water.
230	endothermic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: endothermic is the dictionary headword; compare its inflected or derived forms in context.	эндотерми́ческий	The endothermic reaction made the container feel cold.
231	exothermic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: exothermic is the dictionary headword; compare its inflected or derived forms in context.	экзотерми́ческий	The exothermic reaction warmed the solution.
232	cell-membrane	noun Study Field: Grade 8 science and technology word Word study: Term structure: cell + membrane. Study the complete expression as one field-specific unit.	клеточная мембрана	The cell-membrane allows some substances to pass while blocking others.
233	mitochondrion	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: mitochondrion is the dictionary headword; compare its inflected or derived forms in context.	1. митохо́ндрия 2. митохондрия	A muscle cell contains many mitochondria, and each mitochondrion helps supply energy.
234	chloroplast	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: chloroplast is the dictionary headword; compare its inflected or derived forms in context.	хлоропла́ст	Chlorophyll inside each chloroplast absorbs light.
235	ribosome	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: ribosome is the dictionary headword; compare its inflected or derived forms in context.	1. рибосо́ма 2. рибосома	A ribosome links amino acids in the order specified by genetic instructions.
236	genotype	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: genotype is the dictionary headword; compare its inflected or derived forms in context.	1. геноти́п 2. генотип	The plant's genotype includes one allele for tall growth and one for short growth.
237	phenotype	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: phenotype is the dictionary headword; compare its inflected or derived forms in context.	1. феноти́п 2. фенотип	Sunlight can influence the color phenotype of some plants.
238	meiosis	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: meiosis is the dictionary headword; compare its inflected or derived forms in context.	1. мейо́з 2. мейоз	Meiosis creates genetic variation in eggs and sperm.
239	mitosis	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: mitosis is the dictionary headword; compare its inflected or derived forms in context.	1. мито́з 2. митоз	Skin cells multiply through mitosis as a cut heals.
240	natural-selection	noun Study Field: Grade 8 science and technology word Word study: Term structure: natural + selection. Study the complete expression as one field-specific unit.	естественный отбор	Natural-selection favored moths whose coloring hid them from predators.
241	speciation	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	видообразование	Long isolation on separate islands can lead to speciation.
242	transcription	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. транскри́пция 2. транскрипция	During transcription, a cell produces an RNA copy of a gene.
243	succession	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	последовательность	After the lava cools, ecological succession begins with lichens.
244	hormone	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: hormone is the dictionary headword; compare its inflected or derived forms in context.	1. гормо́н 2. инкре́т 3. гормон	The hormone insulin helps regulate blood glucose.
245	antibiotic	noun Study Field: Grade 8 science and technology word Word study: Prefix focus: anti- means against or opposed to.	1. антибио́тик 2. антибиотик	A doctor may prescribe an antibiotic for a confirmed bacterial infection.
246	tectonic-plate	noun Study Field: Grade 8 science and technology word Word study: Term structure: tectonic + plate. Study the complete expression as one field-specific unit.	тектоническая плита	The Pacific tectonic-plate meets several other plates along active boundaries.
247	codon	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: codon is the dictionary headword; compare its inflected or derived forms in context.	1. кодо́н 2. три́плет	Each codon in messenger RNA directs one step in protein assembly.
248	subduction	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	субду́кция	Subduction can produce deep ocean trenches and volcanic arcs.
249	convection-current	noun Study Field: Grade 8 science and technology word Word study: Term structure: convection + current. Study the complete expression as one field-specific unit.	конвекционный ток	A convection-current forms in the heated water.
250	fault-line	noun Study Field: Grade 8 science and technology word Word study: Term structure: fault + line. Study the complete expression as one field-specific unit.	линия разлома	The earthquake began near a mapped fault-line.

Vocabulary reading and practice

Evidence of Change

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

English reading

During transcription, a cell copies genetic information into RNA. Over generations, natural-selection can favor useful variations, and isolated populations may undergo speciation. These biological processes differ from combustion, a chemical reaction involving oxygen, and from a simple reduction in population size.

Russian translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What happens during transcription?

Genetic information is copied into RNA.

2. What may happen to isolated populations?

They may undergo speciation.

3. Is combustion a biological process?

No, combustion is a chemical reaction.

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.

8th Grade Vocabulary Words

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