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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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Iowa ISASP Science Practice Questions

A 10-question Iowa ISASP Science practice set on life science, 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

What is the main role of chlorophyll in a plant?

Please select an answer first.

Correct answer: A

The correct answer is It captures light energy for photosynthesis..

  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: Chlorophyll absorbs light energy used to make sugars during photosynthesis.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Chlorophyll absorbs light energy used to make sugars during photosynthesis.

2. QuestionMultiple choice

Which process allows a cell to make more cells for growth and repair?

Please select an answer first.

Correct answer: B

The correct answer is Cell division.

  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: Cell division produces new cells that support growth and repair.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Cell division produces new cells that support growth and repair.

3. QuestionMultiple choice

In a food web, what is the most likely effect if the number of plants decreases?

Please select an answer first.

Correct answer: C

The correct answer is Less energy is available to organisms that eat plants..

  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: Plants are producers, so fewer plants provide less energy to the next trophic levels.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Plants are producers, so fewer plants provide less energy to the next trophic levels.

4. QuestionMultiple choice

What do genes provide instructions for?

Please select an answer first.

Correct answer: D

The correct answer is Traits and the production of proteins.

  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: Genes contain information that influences traits and helps direct protein production.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Genes contain information that influences traits and helps direct protein production.

5. QuestionMultiple choice

A population of bacteria becomes resistant to an antibiotic over many generations. What best explains this change?

Please select an answer first.

Correct answer: A

The correct answer is Resistant bacteria survive and reproduce more successfully..

  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: Bacteria with helpful inherited variation are more likely to survive and pass on that trait.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Bacteria with helpful inherited variation are more likely to survive and pass on that trait.

6. QuestionMultiple choice

Which relationship benefits both organisms?

Please select an answer first.

Correct answer: B

The correct answer is Mutualism.

  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: Mutualism is a relationship in which both organisms benefit.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Mutualism is a relationship in which both organisms benefit.

7. QuestionMultiple choice

What is the primary function of the circulatory system?

Please select an answer first.

Correct answer: C

The correct answer is To transport materials throughout the body.

  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 circulatory system moves oxygen, nutrients, hormones, and wastes through the body.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

The circulatory system moves oxygen, nutrients, hormones, and wastes through the body.

8. QuestionMultiple choice

Why are decomposers important in an ecosystem?

Please select an answer first.

Correct answer: D

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

  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: Decomposers break down dead matter and return nutrients to soil and water.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Decomposers break down dead matter and return nutrients to soil and water.

9. QuestionMultiple choice

Which evidence supports the idea that a trait is inherited?

Please select an answer first.

Correct answer: A

The correct answer is Offspring show a trait also found in their biological parents..

  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 similar trait in biological parents and offspring is evidence of inheritance.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

A similar trait in biological parents and offspring is evidence of inheritance.

10. QuestionMultiple choice

What is homeostasis?

Please select an answer first.

Correct answer: B

The correct answer is Maintaining relatively stable internal conditions.

  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: Homeostasis keeps conditions such as temperature and water balance within a workable range.
  3. Check the model: Confirm that the selected answer is consistent with the observation, data, diagram, or scientific principle.

Homeostasis keeps conditions such as temperature and water balance within a workable range.

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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.