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Arkansas ATLAS · Grade 8 · Science

Arkansas ATLAS Grade 8 Science Practice Test

Build Grade 8 Arkansas ATLAS Science readiness with five focused 10-question practice sets covering matter, energy, forces, cells, heredity, Earth systems, and scientific evidence.

Arkansas ATLAS Grade 8 Science practice sets

This Arkansas ATLAS Grade 8 Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support supplemental review of physical science, life science, heredity, evolution, Earth systems, engineering, data, and environmental evidence.

Grade 8 Science skills covered

  • Matter, chemical reactions, conservation of mass, energy transfer, forces, motion, circuits, and waves
  • Cell structures, body systems, photosynthesis, cellular respiration, ecosystems, populations, and interactions
  • DNA, genes, alleles, heredity, mutations, natural selection, adaptation, common ancestry, and biodiversity
  • Plate tectonics, weather and climate, water resources, seasons, lunar patterns, carbon cycling, and human impacts
  • Engineering criteria and constraints, variables, models, data displays, uncertainty, design revisions, and evidence-based claims

How to use this page

Complete one 10-question set at a time. Identify the evidence in each scenario, compare patterns in data, and review the explanation for every missed or guessed answer.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Arkansas Department of Education ATLAS guidance, official blueprints, accommodations, or testing schedules.

For the broader Arkansas assessment hub, visit Arkansas State Assessments.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

3. Test

Arkansas ATLAS Grade 8 Science Practice Questions

A 10-question Arkansas ATLAS Grade 8 science practice set on heredity, evolution, and biodiversity, with answers and explanations.

Read each scenario carefully, choose one answer, and review the explanation after responding.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What molecule stores the instructions for inherited traits?

Please select an answer first.

Correct answer: A

The correct answer is DNA.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: DNA contains genetic instructions that influence traits and guide the production of proteins.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

DNA contains genetic instructions that influence traits and guide the production of proteins.

2. QuestionMultiple choice

What is an allele?

Please select an answer first.

Correct answer: B

The correct answer is A version of a gene.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Alleles are different forms of the same gene and can contribute to variation in a trait.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Alleles are different forms of the same gene and can contribute to variation in a trait.

3. QuestionMultiple choice

A plant has one allele for purple flowers and one allele for white flowers. If purple is dominant, what color will the flowers most likely be?

Please select an answer first.

Correct answer: C

The correct answer is Purple.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: A dominant allele can determine the observed trait when it is paired with a recessive allele.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

A dominant allele can determine the observed trait when it is paired with a recessive allele.

4. QuestionMultiple choice

In a Punnett square, what do the symbols along the top and side usually represent?

Please select an answer first.

Correct answer: D

The correct answer is Possible alleles contributed by each parent.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Punnett square labels represent the allele combinations that each parent can pass to offspring.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Punnett square labels represent the allele combinations that each parent can pass to offspring.

5. QuestionMultiple choice

How can a mutation affect an organism?

Please select an answer first.

Correct answer: A

The correct answer is It can change DNA and may alter a trait.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: A mutation is a change in DNA. Its effect can be harmful, helpful, or neutral depending on the gene and environment.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

A mutation is a change in DNA. Its effect can be harmful, helpful, or neutral depending on the gene and environment.

6. QuestionMultiple choice

A population of beetles includes some individuals that are harder for birds to see. Over many generations, those beetles become more common. What process best explains this change?

Please select an answer first.

Correct answer: B

The correct answer is Natural selection.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Beetles that are harder to see may survive and reproduce more often, increasing the frequency of that inherited trait.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Beetles that are harder to see may survive and reproduce more often, increasing the frequency of that inherited trait.

7. QuestionMultiple choice

Why is a thick layer of fur an adaptation for some arctic mammals?

Please select an answer first.

Correct answer: C

The correct answer is It helps reduce heat loss in a cold environment.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Thick fur can provide insulation, helping an animal maintain body temperature in cold conditions.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Thick fur can provide insulation, helping an animal maintain body temperature in cold conditions.

8. QuestionMultiple choice

Which evidence would best support that two species share a common ancestor?

Please select an answer first.

Correct answer: D

The correct answer is Similar DNA sequences and similar underlying structures.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Shared genetic sequences and homologous structures can indicate inheritance from a common ancestor.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Shared genetic sequences and homologous structures can indicate inheritance from a common ancestor.

9. QuestionMultiple choice

What can scientists learn from a sequence of fossils in different rock layers?

Please select an answer first.

Correct answer: A

The correct answer is How organisms and traits changed over time.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: Fossils in ordered rock layers provide evidence about past organisms and changes across geologic time.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

Fossils in ordered rock layers provide evidence about past organisms and changes across geologic time.

10. QuestionMultiple choice

Why can greater biodiversity make an ecosystem more resilient?

Please select an answer first.

Correct answer: B

The correct answer is Different species may respond differently to a disturbance.

  1. Identify the science idea: Decide whether the question is about matter, energy, forces, cells, heredity, Earth systems, or scientific evidence.
  2. Use the evidence: A diverse ecosystem may continue functioning because some species can survive or replace lost ecosystem roles after a disturbance.
  3. Check the claim: Make sure the answer matches the model, observation, data, or system described.

A diverse ecosystem may continue functioning because some species can survive or replace lost ecosystem roles after a disturbance.

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Frequently asked questions about Arkansas ATLAS Grade 8 Science Practice Test

Which science skills are covered?

The page covers matter, energy, forces, cells, ecosystems, heredity, evolution, Earth systems, engineering, data, and evidence.

How many questions are included?

There are five practice sets with 10 questions each, for 50 questions in total. Each set can be completed separately.

Are these official ATLAS questions?

No. These are original supplemental practice questions. Check the latest Arkansas Department of Education information for official materials, standards, accommodations, and policies.