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Arizona AzSCI · Grade 8 · Science

Arizona Grade 8 AzSCI Science Practice Test

Build Grade 8 Arizona AzSCI readiness with five focused 10-question practice sets covering cells, genetics, ecosystems, matter, energy, Earth systems, engineering, and scientific evidence.

Arizona Grade 8 AzSCI practice sets

This Arizona Grade 8 AzSCI Science Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support supplemental review across life science, physical science, Earth and space science, engineering, investigation, data, and scientific explanation.

Skills covered

  • Cell structures, cell division, genes, chromosomes, dominant traits, natural selection, fossils, competition, and biodiversity
  • Elements, chemical reactions, conservation of mass, particles, density, thermal energy, potential energy, circuits, forces, and waves
  • Tectonic plates, rocks, climate, greenhouse gases, carbon and water cycles, seasons, Moon phases, renewable energy, and Earth history
  • Variables, controls, association and causation, models, graphs, repeated measurements, precision, engineering constraints, prototypes, and CER responses
  • Integrated Grade 8 science practice with algae blooms, insulation, earthquake design, genotype and phenotype, climate data, energy transformations, filters, and invasive species

How to use this page

Complete one 10-question set at a time. Record the evidence that supports each answer, review the explanation, and revisit any model or data interpretation that caused an error.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Arizona Department of Education guidance, official AzSCI blueprints, accommodations, or testing schedules.

For the broader Arizona assessment hub, visit Arizona State Assessments.

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5 Tests
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1. Test

Arizona Grade 8 AzSCI Science Practice Questions

A 10-question Arizona Grade 8 AzSCI science practice set on cells, genetics, and ecosystems, with answers and explanations.

Read each science scenario 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 organelle releases usable energy from food for a cell?

Please select an answer first.

Correct answer: A

The correct answer is Mitochondrion.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Mitochondria help release energy from food during cellular respiration.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Mitochondria help release energy from food during cellular respiration.

2. QuestionMultiple choice

What is one difference between a prokaryotic cell and a eukaryotic cell?

Please select an answer first.

Correct answer: B

The correct answer is A eukaryotic cell has a nucleus surrounded by a membrane.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do not.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do not.

3. QuestionMultiple choice

What is the main purpose of mitosis in a multicellular organism?

Please select an answer first.

Correct answer: C

The correct answer is Growth and replacement of cells.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Mitosis produces genetically similar cells used for growth and tissue repair.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Mitosis produces genetically similar cells used for growth and tissue repair.

4. QuestionMultiple choice

Where are genes located?

Please select an answer first.

Correct answer: D

The correct answer is On chromosomes made of DNA.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Genes are sections of DNA organized on chromosomes.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Genes are sections of DNA organized on chromosomes.

5. QuestionMultiple choice

A plant has a dominant allele for purple flowers and a recessive allele for white flowers. What color is expected from one dominant and one recessive allele?

Please select an answer first.

Correct answer: A

The correct answer is Purple.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: A dominant allele is expressed when paired with a recessive allele in this model.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

A dominant allele is expressed when paired with a recessive allele in this model.

6. QuestionMultiple choice

How can natural selection change a population?

Please select an answer first.

Correct answer: B

The correct answer is Inherited traits that improve survival may become more common.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Individuals with helpful inherited traits are more likely to survive and reproduce.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Individuals with helpful inherited traits are more likely to survive and reproduce.

7. QuestionMultiple choice

Why are fossils useful evidence when studying the history of life?

Please select an answer first.

Correct answer: C

The correct answer is They show remains or traces of organisms from the past.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Fossils provide evidence about organisms and environments from earlier times.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Fossils provide evidence about organisms and environments from earlier times.

8. QuestionMultiple choice

What may happen when two species in an ecosystem depend on the same limited food?

Please select an answer first.

Correct answer: D

The correct answer is They may compete for the food.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Organisms compete when they need the same scarce resource.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Organisms compete when they need the same scarce resource.

9. QuestionMultiple choice

How are photosynthesis and cellular respiration connected?

Please select an answer first.

Correct answer: A

The correct answer is The products of one process can be used by the other.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: Photosynthesis produces glucose and oxygen, which respiration can use to release energy.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

Photosynthesis produces glucose and oxygen, which respiration can use to release energy.

10. QuestionMultiple choice

Why can biodiversity make an ecosystem more stable?

Please select an answer first.

Correct answer: B

The correct answer is Different species can fill different roles and respond differently to change.

  1. Identify the evidence: Read the model, observation, or scenario and identify the scientific evidence provided.
  2. Apply the science idea: A variety of species and roles can help an ecosystem continue functioning after change.
  3. Check the conclusion: Make sure the conclusion is supported by the evidence and answers the question.

A variety of species and roles can help an ecosystem continue functioning after change.

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Frequently asked questions about Arizona Grade 8 AzSCI Science Practice Test

Which Grade 8 science skills are covered?

The page covers cells, genetics, ecosystems, matter, energy, forces, waves, Earth systems, climate, engineering, data, and scientific evidence.

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 AzSCI questions?

No. These are original supplemental practice questions. Check the latest Arizona Department of Education information for official AzSCI materials, standards, accommodations, and policies.