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Idaho State Assessments · ISAT Science

Idaho ISAT Science Practice Test

Build Idaho science readiness with five focused 10-question practice sets covering life science, physical science, Earth and space science, engineering, data, and evidence.

Idaho ISAT Science practice sets

This Idaho ISAT Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover life science, physical science, Earth and space science, engineering and data investigation, and integrated review.

ISAT Science skills

The Idaho Department of Education describes ISAT science assessment for Grades 5, 8, and 11. Use these supplemental questions to practice interpreting models, analyzing data, explaining scientific relationships, evaluating investigations, and using evidence.

How to use this page

Complete one 10-question set at a time. Return to the model, graph, table, or investigation, then review the explanation after each response.

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

For broader grade-level study paths, explore Elementary School Tests, Middle School Tests, and High School Tests.

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

1. Test

Idaho ISAT Science Practice Questions

A 10-question Idaho ISAT Science practice set on life science, with answers and explanations.

Read each investigation, model, graph, or science question carefully, choose one answer, and review the explanation after responding.

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

Which structure in a plant absorbs most of the water from soil?

Please select an answer first.

Correct answer: A

The correct answer is Roots.

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Roots take in water and minerals from the soil.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Roots take in water and minerals from the soil.

2. QuestionMultiple choice

What is the main purpose of photosynthesis?

Please select an answer first.

Correct answer: B

The correct answer is To make food using light energy.

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Plants use light energy to make food from water and carbon dioxide.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Plants use light energy to make food from water and carbon dioxide.

3. QuestionMultiple choice

A student observes that a bird has a short, strong beak and eats seeds. What is the beak most likely an example of?

Please select an answer first.

Correct answer: C

The correct answer is An adaptation.

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: A body feature that helps an organism get food is an adaptation.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

A body feature that helps an organism get food is an adaptation.

4. QuestionMultiple choice

Which sequence shows a simple food chain?

Please select an answer first.

Correct answer: D

The correct answer is Grass, rabbit, hawk.

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Energy can move from grass to a rabbit and then to a hawk.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Energy can move from grass to a rabbit and then to a hawk.

5. QuestionMultiple choice

Why are decomposers important in an ecosystem?

Please select an answer first.

Correct answer: A

The correct answer is They return nutrients to the environment..

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Decomposers break down dead material and return nutrients to soil and other parts of the ecosystem.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Decomposers break down dead material and return nutrients to soil and other parts of the ecosystem.

6. QuestionMultiple choice

A population of insects has many individuals with a trait that helps them survive cold weather. Over many generations, what may happen?

Please select an answer first.

Correct answer: B

The correct answer is The helpful trait may become more common..

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Individuals with a helpful trait may be more likely to survive and reproduce, making the trait more common over generations.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Individuals with a helpful trait may be more likely to survive and reproduce, making the trait more common over generations.

7. QuestionMultiple choice

What is the role of the nucleus in most animal cells?

Please select an answer first.

Correct answer: C

The correct answer is It contains genetic information and helps control cell activities..

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: The nucleus stores genetic material and helps direct cell functions.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

The nucleus stores genetic material and helps direct cell functions.

8. QuestionMultiple choice

Two parents pass traits to their offspring. What carries information about inherited traits?

Please select an answer first.

Correct answer: D

The correct answer is Genes.

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: Genes carry inherited information from parents to offspring.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Genes carry inherited information from parents to offspring.

9. QuestionMultiple choice

A student notices that a cactus has a waxy coating and spines. How do these features help the cactus?

Please select an answer first.

Correct answer: A

The correct answer is They help reduce water loss and protect the plant..

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: A waxy coating can reduce water loss and spines can provide protection.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

A waxy coating can reduce water loss and spines can provide protection.

10. QuestionMultiple choice

A graph shows that the number of frogs in a pond increased after a wet season. Which conclusion is supported?

Please select an answer first.

Correct answer: B

The correct answer is The frog population was larger after the measured wet season..

  1. Read the Idaho science task: Identify the system, evidence, variable, model, or scientific pattern the question asks you to examine.
  2. Use scientific evidence: The graph supports a change in the measured population, not an unsupported claim about species or all conditions.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

The graph supports a change in the measured population, not an unsupported claim about species or all conditions.

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Frequently asked questions about Idaho ISAT Science Practice

Which Idaho Science skills are covered?

The page provides supplemental practice for life science, physical science, Earth and space science, engineering design, data analysis, investigations, and evidence-based reasoning.

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 Idaho ISAT questions?

No. These are original supplemental practice questions. Check the latest Idaho Department of Education information for current assessment materials, accommodations, and policies.