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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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Idaho ISAT Science Practice Questions

A 10-question Idaho ISAT Science practice set on engineering and data investigation, 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

A student tests which paper bridge design holds the most weight. What is the dependent variable?

Please select an answer first.

Correct answer: A

The correct answer is The weight the bridge holds.

  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 dependent variable is the outcome measured after changing the bridge design.
  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 dependent variable is the outcome measured after changing the bridge design.

2. QuestionMultiple choice

Why should an investigation change only one main variable at a time?

Please select an answer first.

Correct answer: B

The correct answer is To make it easier to identify what caused the result..

  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: Changing one main variable helps connect the observed result to that variable.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Changing one main variable helps connect the observed result to that variable.

3. QuestionMultiple choice

A graph shows that plant height increased as the amount of sunlight increased. What association is shown?

Please select an answer first.

Correct answer: C

The correct answer is A positive association.

  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: Both measured values tend to increase together, which is a positive association.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Both measured values tend to increase together, which is a positive association.

4. QuestionMultiple choice

A student repeats a temperature measurement three times and gets 21, 22, and 21 degrees. What does this support?

Please select an answer first.

Correct answer: D

The correct answer is The measurements are consistent under the tested conditions..

  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: Similar repeated results support consistency, although they do not prove every possible condition.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Similar repeated results support consistency, although they do not prove every possible condition.

5. QuestionMultiple choice

Which design would best protect an egg dropped from a height?

Please select an answer first.

Correct answer: A

The correct answer is A padded container that slows the impact.

  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: Padding can absorb some energy and increase the time of impact, reducing the force on the egg.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Padding can absorb some energy and increase the time of impact, reducing the force on the egg.

6. QuestionMultiple choice

A model shows arrows from sunlight to plants and from plants to animals. What does the model represent?

Please select an answer first.

Correct answer: B

The correct answer is Energy transfer in an ecosystem.

  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 arrows show energy moving from sunlight to plants and then to animals.
  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 arrows show energy moving from sunlight to plants and then to animals.

7. QuestionMultiple choice

A table lists rainfall amounts of 12, 18, 15, and 9 millimeters. Which amount is greatest?

Please select an answer first.

Correct answer: C

The correct answer is 18 millimeters.

  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: Comparing the values shows that 18 millimeters is the greatest amount.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Comparing the values shows that 18 millimeters is the greatest amount.

8. QuestionMultiple choice

A student claims that insulation keeps water warm longer. Which test is fairest?

Please select an answer first.

Correct answer: D

The correct answer is Use identical containers with different insulation while keeping water amount and starting temperature the same..

  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: Keeping other conditions the same makes insulation the clearer variable being tested.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Keeping other conditions the same makes insulation the clearer variable being tested.

9. QuestionMultiple choice

What should scientists do when new evidence does not support their original explanation?

Please select an answer first.

Correct answer: A

The correct answer is Revise the explanation and test it again..

  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: Scientific explanations can be revised when new evidence gives better support for another idea.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Scientific explanations can be revised when new evidence gives better support for another idea.

10. QuestionMultiple choice

A design solves a problem but uses more material than allowed. What should engineers do next?

Please select an answer first.

Correct answer: B

The correct answer is Modify the design to meet all stated criteria and constraints..

  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: Engineering solutions must be evaluated against both criteria and constraints.
  3. Check the conclusion: Confirm that the answer matches the evidence, uses the correct relationship, and does not claim more than the data show.

Engineering solutions must be evaluated against both criteria and constraints.

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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.