California CAA · Science · Grades 5, 8, and High School

California CAA Science Practice Test: Grades 5, 8, and High School

Build science readiness with five focused 10-question practice sets covering living systems, physical science, Earth and space, environmental resources, and scientific practices.

CAA Science practice sets

This California CAA Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets offer supplemental practice for Grades 5, 8, and high school across life science, physical science, Earth and space science, environmental systems, and scientific investigation.

Science skills covered

  • Living things, food and nutrients, plant roots, cells, populations, relationships, heredity, food chains, biodiversity, and reproduction
  • States and properties of matter, friction, energy, conductors, thermal transfer, forces, chemical change, circuits, and light absorption
  • Day and night, solar energy, runoff, erosion, shadows, the Moon, volcanoes, precipitation, fossils, and planetary orbits
  • Clean water, waste reduction, fish populations, forests, renewable resources, invasive species, trees, electricity, sediment, and pollinators
  • Investigation planning, tools, controlled variables, observations, graphs, repeated measurements, variables, models, reliability, and evidence

How to use this page

Complete one 10-question set at a time. Identify the observable evidence, choose the best-supported answer, and review every explanation before moving to the next set.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current California Department of Education guidance, official CAA materials, accessibility supports, or testing policies.

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

3. Test

California CAA Science Practice Questions

A 10-question California CAA Science practice set on earth and space science, with answers and explanations.

Read each science task 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 causes day and night on Earth?

Please select an answer first.

Correct answer: A

The correct answer is Earth rotates on its axis..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: As Earth rotates, different parts face toward or away from the Sun.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

As Earth rotates, different parts face toward or away from the Sun.

2. QuestionMultiple choice

What is the main source of energy for Earth’s surface systems?

Please select an answer first.

Correct answer: B

The correct answer is The Sun.

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Solar energy drives many surface and atmospheric processes.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Solar energy drives many surface and atmospheric processes.

3. QuestionMultiple choice

How does rain become part of a river or lake?

Please select an answer first.

Correct answer: C

The correct answer is Water flows over land or through streams..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Runoff and streams carry water into rivers, lakes, and other bodies of water.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Runoff and streams carry water into rivers, lakes, and other bodies of water.

4. QuestionMultiple choice

What can happen when wind and water wear away rock?

Please select an answer first.

Correct answer: D

The correct answer is Erosion moves sediment to another place..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Erosion transports weathered material by wind or water.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Erosion transports weathered material by wind or water.

5. QuestionMultiple choice

Why do shadows change length during the day?

Please select an answer first.

Correct answer: A

The correct answer is The Sun’s apparent position changes as Earth rotates..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Changing light angle changes the length and direction of a shadow.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Changing light angle changes the length and direction of a shadow.

6. QuestionMultiple choice

What is the Moon’s surface made mostly of?

Please select an answer first.

Correct answer: B

The correct answer is Rock and dust..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: The Moon has a rocky, dusty surface with no global liquid-water ocean.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

The Moon has a rocky, dusty surface with no global liquid-water ocean.

7. QuestionMultiple choice

Which event can change the shape of Earth’s surface quickly?

Please select an answer first.

Correct answer: C

The correct answer is A volcanic eruption.

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Eruptions can add lava and ash and change landforms rapidly.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Eruptions can add lava and ash and change landforms rapidly.

8. QuestionMultiple choice

What type of weather includes falling drops of liquid water?

Please select an answer first.

Correct answer: D

The correct answer is Rain.

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Rain is liquid precipitation that falls from clouds.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Rain is liquid precipitation that falls from clouds.

9. QuestionMultiple choice

Why are fossils useful to scientists?

Please select an answer first.

Correct answer: A

The correct answer is They provide evidence about organisms and environments from the past..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Fossils preserve information about past life and conditions.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Fossils preserve information about past life and conditions.

10. QuestionMultiple choice

What do planets do as they move around the Sun?

Please select an answer first.

Correct answer: B

The correct answer is They orbit the Sun..

  1. Identify the science idea: Read the situation and identify the observable science concept.
  2. Use the evidence: Planets travel in orbits around the Sun because of motion and gravity.
  3. Check the choice: Choose the answer that best matches the evidence in the task.

Planets travel in orbits around the Sun because of motion and gravity.

Choose your next study path

Frequently asked questions about California CAA Science Practice Test

Which Science skills are covered?

The page covers supplemental living systems, physical science, Earth and space science, environmental resources, and scientific investigation practice for Grades 5, 8, and high school.

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 CAA Science questions?

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