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Iowa State Assessments · Grade 8 Science

Iowa ISASP Grade 8 Science Practice Test

Build Grade 8 Iowa science readiness with five focused 10-question practice sets covering forces, energy, matter, cells, genetics, Earth systems, data, and engineering.

Iowa ISASP Grade 8 Science practice sets

This Iowa ISASP Grade 8 Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover physical science, life science, genetics, Earth and space systems, investigation design, data, models, evidence, and engineering.

Skills covered

  • Net force, speed, kinetic and potential energy, density, chemical reactions, atoms, circuits, thermal energy, and energy transformations
  • Cells, photosynthesis, cellular respiration, genes, natural selection, carrying capacity, food webs, body systems, reproduction, and biodiversity
  • Plate tectonics, rock cycles, greenhouse gases, weather fronts, Moon phases, seasons, ocean currents, groundwater, resources, and climate evidence
  • Variables, controls, repeated trials, associations, models, design constraints, measurement error, credible sources, claims, and graphs
  • Integrated Grade 8 reasoning with calculations, conservation, populations, climate data, circuits, genetics, plate boundaries, energy flow, and design criteria

How to use this page

Complete one 10-question set at a time. Identify the system, use the evidence in the question, apply the relevant scientific principle, and check the conclusion.

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.

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 Grade 8 Science Practice Questions

A 10-question Iowa ISASP Grade 8 Science practice set on life science and genetics, with answers and explanations.

Read each scenario, equation, model, data description, 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

Which cell structure contains genetic material and helps control cell activities?

Please select an answer first.

Correct answer: A

The correct answer is Nucleus.

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: The nucleus contains genetic material and directs many cell activities.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

The nucleus contains genetic material and directs many cell activities.

2. QuestionMultiple choice

What is the main purpose of photosynthesis?

Please select an answer first.

Correct answer: B

The correct answer is To store light energy in chemical energy..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Photosynthesis uses light energy to make sugars from carbon dioxide and water.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

Photosynthesis uses light energy to make sugars from carbon dioxide and water.

3. QuestionMultiple choice

What is a major function of cellular respiration?

Please select an answer first.

Correct answer: C

The correct answer is It releases usable energy from food molecules..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Cellular respiration breaks down food molecules to release energy cells can use.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

Cellular respiration breaks down food molecules to release energy cells can use.

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 system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Genes carry information that influences traits and helps direct protein production.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

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

5. QuestionMultiple choice

A population of insects becomes resistant to a pesticide over many generations. What best explains this pattern?

Please select an answer first.

Correct answer: A

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

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Inherited variation allows some insects to survive, reproduce, and pass on resistance.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

Inherited variation allows some insects to survive, reproduce, and pass on resistance.

6. QuestionMultiple choice

What can happen when a population reaches the carrying capacity of its environment?

Please select an answer first.

Correct answer: B

The correct answer is Resources limit further population growth..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: At carrying capacity, limited resources can balance births and deaths.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

At carrying capacity, limited resources can balance births and deaths.

7. QuestionMultiple choice

Why can a toxin become more concentrated in organisms higher in a food web?

Please select an answer first.

Correct answer: C

The correct answer is The toxin can accumulate as organisms eat many contaminated organisms..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: A persistent toxin can become more concentrated at higher trophic levels.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

A persistent toxin can become more concentrated at higher trophic levels.

8. QuestionMultiple choice

How can the respiratory and circulatory systems work together?

Please select an answer first.

Correct answer: D

The correct answer is The respiratory system adds oxygen to blood, and the circulatory system transports it..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: The lungs exchange gases, and blood carries oxygen to cells.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

The lungs exchange gases, and blood carries oxygen to cells.

9. QuestionMultiple choice

What is an example of asexual reproduction?

Please select an answer first.

Correct answer: A

The correct answer is One parent produces genetically similar offspring..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Asexual reproduction uses one parent and usually produces genetically similar offspring.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

Asexual reproduction uses one parent and usually produces genetically similar offspring.

10. QuestionMultiple choice

Why is biodiversity often important for ecosystem stability?

Please select an answer first.

Correct answer: B

The correct answer is More variety can provide more roles and responses to change..

  1. Identify the system: Determine whether the question involves forces, matter, cells, Earth systems, data, or an engineering design.
  2. Use the evidence: Different species can fill different roles and help an ecosystem respond to disturbance.
  3. Check the model: Confirm that the selected answer follows from the data, equation, diagram, or scientific principle.

Different species can fill different roles and help an ecosystem respond to disturbance.

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Frequently asked questions about Iowa ISASP Grade 8 Science Practice

What does Grade 8 Iowa ISASP Science practice include?

Grade 8 Iowa Science assessment practice includes forces, energy, matter, cells, genetics, ecosystems, Earth systems, data, models, engineering, and evidence-based reasoning.

Is Grade 8 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.