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Free 8th Grade Practice Quiz

Interactive worksheets to boost your skills

Difficulty: Moderate
Grade: Grade 8
Study OutcomesCheat Sheet
Colorful paper art promoting the Free 8th Grade Challenge interactive practice quiz.

What is 1/2 + 1/4?
5/4
1/2
3/4
1
Adding fractions requires a common denominator. Converting 1/2 to 2/4 and adding that to 1/4 gives 3/4.
Which sentence is grammatically correct?
She don't like apples.
She doesn't likes apples.
She doesn't like apples.
She don't likes apples.
The sentence 'She doesn't like apples.' correctly applies subject-verb agreement using the contraction 'doesn't.' This makes it grammatically correct.
What is the primary source of energy for Earth?
Electricity
The Moon
The Sun
Fossil fuels
The Sun provides the majority of energy received by Earth, driving both weather and climate. Its radiation is essential for the survival of living organisms.
Which document declared independence from Britain in 1776?
Constitution
Declaration of Independence
Bill of Rights
Articles of Confederation
The Declaration of Independence was adopted in 1776 to announce the colonies' separation from Britain. It marks a pivotal moment in American history.
What is the sum of the interior angles of a triangle?
180 degrees
270 degrees
90 degrees
360 degrees
In Euclidean geometry, the sum of the interior angles of any triangle is always 180 degrees. This is a fundamental property of triangles.
Solve for x: 2x + 5 = 17.
6
7
5
4
Subtract 5 from both sides to obtain 2x = 12. Dividing both sides by 2 gives x = 6.
Which part of a plant is primarily responsible for photosynthesis?
Leaves
Stem
Flowers
Roots
Leaves contain chlorophyll that captures sunlight, making them the main site for photosynthesis. Other plant parts serve different functions.
What is an appropriate synonym for 'rapid'?
Slow
Heavy
Swift
Dull
The word 'swift' is commonly used to describe something that is rapid. Choosing synonyms involves matching the meaning accurately.
If a rectangle has a length of 10 units and a width of 4 units, what is its perimeter?
14 units
20 units
40 units
28 units
The perimeter of a rectangle is calculated as 2 times the sum of its length and width. Here, 2*(10 + 4) equals 28 units.
Who was the principal author of the Declaration of Independence?
John Adams
Thomas Jefferson
George Washington
Benjamin Franklin
Thomas Jefferson is recognized as the principal author due to his significant contributions in drafting the document. This role is a key point in U.S. history.
Which state of matter has a definite volume but no definite shape?
Plasma
Liquid
Solid
Gas
Liquids maintain a fixed volume while adopting the shape of their container. This property differentiates them from solids, which have a fixed shape, and gases, which have neither.
What is the value of π (pi) rounded to two decimal places?
3.14
3.16
3.00
3.41
Pi is commonly approximated as 3.14 when rounded to two decimal places. This approximation is widely used in calculations and practical applications.
Simplify the expression: 3(x + 4) - 2x.
x + 4
x + 12
5x + 12
5x + 4
First, distribute 3 to get 3x + 12, then subtract 2x to combine like terms resulting in x + 12. This follows the distributive property and proper simplification.
Which ocean is the largest by surface area?
Arctic Ocean
Indian Ocean
Pacific Ocean
Atlantic Ocean
The Pacific Ocean covers more surface area than any other ocean, making it the largest. Its vast expanse distinguishes it in global geography.
In a scientific experiment, which variable is deliberately changed to observe its effect?
Independent variable
Control variable
Dependent variable
Confounding variable
The independent variable is the factor that is intentionally manipulated in an experiment. Its alteration helps in observing the effect on the dependent variable.
A triangle has angles in the ratio 2:3:4. What is the measure of the largest angle?
60 degrees
80 degrees
100 degrees
90 degrees
The sum of the ratio parts is 2 + 3 + 4 = 9. Dividing 180 degrees (the total for a triangle) by 9 gives 20 degrees per part, so the largest angle is 4 × 20 = 80 degrees.
In a simplified biochemical reaction, 1 mole of glucose produces 3 moles of carbon dioxide. How many moles of carbon dioxide are produced from 5 moles of glucose?
15 moles
8 moles
10 moles
5 moles
Multiplying the 5 moles of glucose by the ratio of 3 moles of carbon dioxide per mole gives a total of 15 moles. This demonstrates a straightforward proportional relationship.
Which of the following is a common theme found in allegorical writing?
Sensory descriptions
Moral lessons
Literal facts
Random narratives
Allegorical writing typically uses symbolic figures and events to represent moral or abstract ideas. This method is designed to convey deeper meanings and teach moral lessons.
Solve for x in the equation: 4(x - 3) + 2 = 2x + 10.
6
8
10
12
Expanding the left side gives 4x - 12; adding 2 results in 4x - 10. Setting this equal to 2x + 10 and solving for x yields x = 10.
Which amendment to the U.S. Constitution guarantees freedom of speech?
Second Amendment
Fifth Amendment
First Amendment
Tenth Amendment
The First Amendment is well known for protecting freedom of speech, along with other fundamental rights. This amendment is a cornerstone of American democratic values.
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Study Outcomes

  1. Analyze key concepts across core academic subjects to assess overall knowledge.
  2. Identify strengths and weaknesses in subject areas to focus future study efforts.
  3. Apply problem-solving strategies to answer practice quiz questions effectively.
  4. Evaluate performance to determine readiness for upcoming tests or exams.
  5. Interpret feedback from quiz results to enhance study habits and preparation techniques.

8th Grade Worksheets: Practice Cheat Sheet

  1. Master the eight parts of speech - Learning about nouns, verbs, adjectives, adverbs, conjunctions, interjections, prepositions, and pronouns is like getting superpowers for your writing. When you can spot and use these correctly, your sentences become clearer, more engaging, and expressive. New Path Worksheets
  2. New Path Worksheets
  3. Master verbals: gerunds, participles, and infinitives - Verbals let verbs moonlight as nouns, adjectives, or adverbs, adding flair and variety to your writing. Recognizing a gerund ("Running is fun"), a participle ("The ringing phone woke me"), or an infinitive ("To explore the world") makes your sentences pop. The Core Standards
  4. The Core Standards
  5. Prefer active over passive voice - Active voice keeps your writing punchy and clear, with the subject performing the action ("The cat chased the mouse"). Passive voice ("The mouse was chased by the cat") can sound dull, so aim for strong verbs and direct phrasing whenever possible. GPB ELA
  6. GPB ELA
  7. Experiment with verb moods - Indicative, imperative, interrogative, conditional, and subjunctive moods let you state facts, issue commands, ask questions, explore possibilities, or express wishes. Playing with these moods adds the right tone and intention to every sentence. The Core Standards
  8. The Core Standards
  9. Use context clues to decode words - When you hit an unfamiliar word, scan the surrounding text for hints, break it into known parts, or consult a reference. Mastering this skill boosts your vocabulary and reading confidence in a snap. The Core Standards
  10. The Core Standards
  11. Analyze dialogue and key incidents - Notice how a single line of dialogue or plot twist reveals characters' motives or propels the story forward. This close reading trick helps you understand narrative structure and deepen your literary insights. The Core Standards
  12. The Core Standards
  13. Compare and contrast text structures - Some authors use short, punchy sentences for impact, while others weave long, flowing passages. Analyzing these differences shows how structure influences meaning and style. The Core Standards
  14. The Core Standards
  15. Evaluate arguments and evidence - Check if an author's reasoning is solid and the evidence supports their claims, noting any logical gaps or persuasive tricks. This critical skill helps you become a smarter reader and debater. New Path Worksheets
  16. New Path Worksheets
  17. Practice crafting clear arguments - Structure your writing by stating a claim, backing it with reasons, and supporting those reasons with evidence for maximum impact. With practice, your persuasive essays will become both logical and compelling. Education.com
  18. Education.com
  19. Explore figurative language - Metaphors, similes, idioms, and idiomatic expressions bring your writing to life by painting vivid images in readers' minds. Spotting phrases like "heart of stone" or "time flies" enriches your understanding and use of language. The Core Standards
  20. The Core Standards
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