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Iowa State Assessments · ISASP Science

Iowa ISASP Science Practice Test

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

Iowa ISASP Science practice sets

This Iowa ISASP Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover physical science, life science, Earth and space science, investigation design, data interpretation, engineering, models, evidence, and scientific reasoning.

Science skills covered

  • Forces, energy, matter, waves, circuits, thermal transfer, motion, and chemical change
  • Cells, photosynthesis, ecosystems, genetics, natural selection, body systems, decomposers, inheritance, and homeostasis
  • Earth rotation, tides, water cycle, rocks, fossils, climate, seasons, ocean currents, weather, and the expanding universe
  • Variables, controls, repeated trials, graphs, credible sources, scientific models, design criteria, and evidence-based revision
  • Integrated data analysis, cause and effect, systems thinking, prediction, engineering solutions, and scientific claims

How to use this page

Complete one 10-question set at a time. Identify the system or process, use the evidence in the question, and connect the pattern to a scientific principle before choosing an answer.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Iowa Department of Education guidance, official ISASP materials, blueprints, accommodations, or testing procedures.

Current Iowa assessment information may change by year and grade. For official subject and grade details, visit the Iowa Department of Education summative assessment page. For the broader Iowa assessment hub, visit Iowa State Test Practice or explore Elementary School Tests, Middle School Tests, and High School Tests.

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4. Test

Iowa ISASP Science Practice Questions

A 10-question Iowa ISASP Science practice set on investigation, data, and engineering, with answers and explanations.

Read each scenario, diagram description, data pattern, or claim 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 whether fertilizer affects plant height. What is the independent variable?

Please select an answer first.

Correct answer: A

The correct answer is The amount of fertilizer.

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: The independent variable is the factor the student changes.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

The independent variable is the factor the student changes.

2. QuestionMultiple choice

Why should a controlled investigation include a control group when possible?

Please select an answer first.

Correct answer: B

The correct answer is It provides a comparison for evaluating the tested variable..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: A control gives a baseline for comparing the effect of the independent variable.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

A control gives a baseline for comparing the effect of the independent variable.

3. QuestionMultiple choice

A graph shows that temperature rises as the amount of sunlight increases. What relationship is shown?

Please select an answer first.

Correct answer: C

The correct answer is A positive relationship.

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Both variables increase together, so the graph shows a positive relationship.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Both variables increase together, so the graph shows a positive relationship.

4. QuestionMultiple choice

Why should measurements be repeated during an investigation?

Please select an answer first.

Correct answer: D

The correct answer is Repeated trials improve reliability and help identify unusual results..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Repeated trials help reveal patterns and reduce the influence of random error.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Repeated trials help reveal patterns and reduce the influence of random error.

5. QuestionMultiple choice

Which source is strongest for a claim about current Iowa science assessment requirements?

Please select an answer first.

Correct answer: A

The correct answer is A current official Iowa Department of Education assessment page.

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: A current official education agency source is most appropriate for requirements.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

A current official education agency source is most appropriate for requirements.

6. QuestionMultiple choice

A water filter removes large particles but not dissolved salt. Which design change would best address the salt?

Please select an answer first.

Correct answer: B

The correct answer is Add a treatment that separates dissolved substances..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Dissolved salt requires a process designed to separate substances at the particle level.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Dissolved salt requires a process designed to separate substances at the particle level.

7. QuestionMultiple choice

A student claims that a heavier object always falls faster than a lighter object. Which evidence would best test the claim?

Please select an answer first.

Correct answer: C

The correct answer is Measure the fall times of objects with different masses while controlling shape and height..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Controlled measurements of fall time test the claim more directly.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Controlled measurements of fall time test the claim more directly.

8. QuestionMultiple choice

What is the purpose of a scientific model?

Please select an answer first.

Correct answer: D

The correct answer is To represent a system or process so it can be studied and explained..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Models simplify or represent systems to help explain patterns and make predictions.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Models simplify or represent systems to help explain patterns and make predictions.

9. QuestionMultiple choice

An investigation produces results that do not support the hypothesis. What is the best next step?

Please select an answer first.

Correct answer: A

The correct answer is Use the data to revise the explanation or design another test..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Unexpected results provide information that can guide a revised explanation or investigation.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Unexpected results provide information that can guide a revised explanation or investigation.

10. QuestionMultiple choice

Which design solution is most likely to reduce erosion on a steep school hillside?

Please select an answer first.

Correct answer: B

The correct answer is Plant deep-rooted vegetation and add channels that slow runoff..

  1. Identify the science idea: Determine whether the task asks about a system, pattern, model, cause and effect, evidence, or a design solution.
  2. Use the evidence: Roots hold soil and slower runoff reduces the movement of soil.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Roots hold soil and slower runoff reduces the movement of soil.

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Frequently asked questions about Iowa ISASP Science Practice

What does Iowa ISASP Science practice include?

Iowa Science assessment practice includes physical science, life science, Earth and space science, data analysis, investigation design, engineering, models, and evidence-based reasoning.

Which grades are included in Iowa science assessment information?

Current Iowa Department of Education information lists Science for Grades 5, 8, and 11. Check the official Iowa page for current assessment updates and implementation details.

Are these official Iowa ISASP questions?

No. These are original supplemental practice questions. Use the official Iowa Department of Education pages for current blueprints, released materials, accommodations, policies, and testing procedures.