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Alaska Science Assessment · Grade 8

Alaska Grade 8 Science Assessment Practice Test

Build Grade 8 Alaska science assessment readiness with five focused 10-question practice sets covering energy, ecosystems, Earth systems, engineering, data, and Alaska applications.

Alaska Grade 8 Science Assessment practice sets

This Alaska Grade 8 Science Assessment Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support Grade 8 review across matter, energy, forces, cells, genetics, ecosystems, Earth systems, climate, engineering, data, and Alaska-related phenomena.

Skills covered

  • Chemical reactions, conservation of matter, density, energy, forces, waves, circuits, insulation, and magnetic fields
  • Cell functions, mitosis, alleles, food webs, carrying capacity, natural selection, homeostasis, and biodiversity
  • Plate movement, rocks, seasons, tides, weather fronts, greenhouse gases, groundwater, stars, eclipses, and Alaska earthquakes
  • Variables, correlation, control groups, models, optimization, peer review, uncertainty, fair tests, graphs, and evidence-based claims
  • Permafrost, salmon life cycles, sea ice, volcano monitoring, data interpretation, water quality, invasive species, and bridge testing

How to use this page

Complete one 10-question set at a time. Identify the evidence, connect it to the scientific model, and check whether the conclusion is supported by the data. Review each explanation after responding.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Alaska Department of Education and Early Development guidance, official assessment materials, accommodations, or testing schedules.

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

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

1. Test

Alaska Grade 8 Science Assessment Practice Questions

A 10-question Alaska Grade 8 Science Assessment practice set on matter, energy, and forces, with answers and explanations.

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

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

Which observation is strongest evidence that a chemical reaction occurred?

Please select an answer first.

Correct answer: A

The correct answer is A gas forms and the mixture becomes warmer.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Gas formation and a temperature change can indicate that new substances formed during a reaction.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Gas formation and a temperature change can indicate that new substances formed during a reaction.

2. QuestionMultiple choice

What happens to atoms during a chemical reaction?

Please select an answer first.

Correct answer: B

The correct answer is They are rearranged into new combinations.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Chemical reactions rearrange atoms, but matter is conserved and the atoms are not destroyed.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Chemical reactions rearrange atoms, but matter is conserved and the atoms are not destroyed.

3. QuestionMultiple choice

An object sinks in water because its density is greater than the density of water. Which statement explains density?

Please select an answer first.

Correct answer: C

The correct answer is It compares the amount of mass in a given volume.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Density describes how much mass is packed into a certain volume.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Density describes how much mass is packed into a certain volume.

4. QuestionMultiple choice

Which object has the greatest gravitational potential energy when held at the same height?

Please select an answer first.

Correct answer: D

The correct answer is The object with the greatest mass.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: At the same height, a greater mass has more gravitational potential energy.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

At the same height, a greater mass has more gravitational potential energy.

5. QuestionMultiple choice

Why can other bulbs in a parallel circuit stay lit when one bulb burns out?

Please select an answer first.

Correct answer: A

The correct answer is Each branch can provide a separate path for current.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Parallel branches provide separate paths, so one open branch does not necessarily stop current in the others.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Parallel branches provide separate paths, so one open branch does not necessarily stop current in the others.

6. QuestionMultiple choice

A speaker produces a louder sound without changing its pitch. Which wave property increased?

Please select an answer first.

Correct answer: B

The correct answer is Amplitude.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Greater amplitude transfers more energy and is heard as a louder sound, while frequency determines pitch.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Greater amplitude transfers more energy and is heard as a louder sound, while frequency determines pitch.

7. QuestionMultiple choice

Two objects have the same mass. The first experiences a greater net force. What happens to its acceleration?

Please select an answer first.

Correct answer: C

The correct answer is Its acceleration is greater.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: For the same mass, a greater net force produces a greater acceleration.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

For the same mass, a greater net force produces a greater acceleration.

8. QuestionMultiple choice

Which process transfers thermal energy through the movement of warm and cool fluid?

Please select an answer first.

Correct answer: D

The correct answer is Convection.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Convection transfers thermal energy as warmer, less dense fluid moves and cooler, denser fluid takes its place.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Convection transfers thermal energy as warmer, less dense fluid moves and cooler, denser fluid takes its place.

9. QuestionMultiple choice

Which material is most likely to act as a thermal insulator around a hot drink?

Please select an answer first.

Correct answer: A

The correct answer is Foam.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: Foam contains trapped air and usually transfers thermal energy more slowly than metals.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

Foam contains trapped air and usually transfers thermal energy more slowly than metals.

10. QuestionMultiple choice

What is a magnetic field?

Please select an answer first.

Correct answer: B

The correct answer is The region around a magnet where magnetic forces can act.

  1. Identify the evidence: Read the data, model, or system described in the question.
  2. Apply the science idea: A magnetic field describes the area where a magnet can exert force on magnetic materials or other magnets.
  3. Check the conclusion: Confirm that the answer is consistent with the evidence and the Grade 8 science relationship.

A magnetic field describes the area where a magnet can exert force on magnetic materials or other magnets.

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Frequently asked questions about Alaska Grade 8 Science Assessment Practice Test

Which science skills are covered?

The page covers matter, energy, forces, cells, genetics, ecosystems, Earth systems, climate, engineering, data, and Alaska-related science applications.

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 Alaska assessment questions?

No. These are original supplemental practice questions. Check the latest Alaska Department of Education and Early Development information for official assessment dates, materials, accommodations, and policies.