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Grade 3 Science · Ecosystems

Grade 3 Ecosystems Practice Test

Explore Grade 3 Science with five 10-question practice tests on habitats, biotic and abiotic factors, food chains, producers, consumers, decomposers, and ecosystem relationships.

Ecosystems Practice Tests

These Grade 3 Science practice tests help students understand how living things interact with one another and with nonliving parts of their habitats. Students practice food chains, energy flow, and ecosystem roles.

Skills covered

  • Defining ecosystems and habitats
  • Identifying biotic and abiotic factors
  • Recognizing producers, consumers, and decomposers
  • Reading simple food chains and food webs
  • Explaining how energy moves from the Sun
  • Describing how changes affect ecosystem relationships

How to use these practice tests

Look for clues about whether something is living or nonliving. Then identify how organisms get energy, what resources their habitats provide, and how a change in one population can affect others.

For more Grade 3 Science practice, return to the Grade 3 Science category.

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5 Tests
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1. Test

Grade 3 Ecosystems Practice Tests

A 10-question Grade 3 Science practice test on ecosystems, habitats, biotic and abiotic factors, producers, consumers, decomposers, and food chains.

Read each ecosystem question carefully. Identify the living or nonliving part, the organism role, or the relationship described, then choose the best answer.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is an ecosystem?

Please select an answer first.

Correct answer: A

The correct answer is A community of living things and the nonliving parts around them.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: An ecosystem includes living organisms and nonliving factors interacting in an area.
  3. Check the choice: The correct choice is A community of living things and the nonliving parts around them.

An ecosystem includes living organisms and nonliving factors interacting in an area.

2. QuestionMultiple choice

Which is a biotic, or living, part of an ecosystem?

Please select an answer first.

Correct answer: B

The correct answer is A tree.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: A tree is alive, so it is a biotic part of an ecosystem.
  3. Check the choice: The correct choice is A tree.

A tree is alive, so it is a biotic part of an ecosystem.

3. QuestionMultiple choice

Which is an abiotic, or nonliving, part of an ecosystem?

Please select an answer first.

Correct answer: C

The correct answer is Sunlight.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: Sunlight is nonliving, so it is an abiotic factor.
  3. Check the choice: The correct choice is Sunlight.

Sunlight is nonliving, so it is an abiotic factor.

4. QuestionMultiple choice

What is a habitat?

Please select an answer first.

Correct answer: D

The correct answer is The place where an organism lives and gets what it needs.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: A habitat provides living things with resources such as food, water, and shelter.
  3. Check the choice: The correct choice is The place where an organism lives and gets what it needs.

A habitat provides living things with resources such as food, water, and shelter.

5. QuestionMultiple choice

Which organism is a producer?

Please select an answer first.

Correct answer: A

The correct answer is A green plant.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: Plants are producers because they make their own food using sunlight.
  3. Check the choice: The correct choice is A green plant.

Plants are producers because they make their own food using sunlight.

6. QuestionMultiple choice

Which organism is a consumer?

Please select an answer first.

Correct answer: B

The correct answer is A rabbit that eats grass.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: A rabbit is a consumer because it gets energy by eating another organism.
  3. Check the choice: The correct choice is A rabbit that eats grass.

A rabbit is a consumer because it gets energy by eating another organism.

7. QuestionMultiple choice

What does a decomposer do?

Please select an answer first.

Correct answer: C

The correct answer is It breaks down dead material and returns nutrients to the environment..

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: Decomposers such as fungi and bacteria break down dead material.
  3. Check the choice: The correct choice is It breaks down dead material and returns nutrients to the environment..

Decomposers such as fungi and bacteria break down dead material.

8. QuestionMultiple choice

What is a food chain?

Please select an answer first.

Correct answer: D

The correct answer is A sequence showing how energy moves from one organism to another.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: A food chain shows feeding relationships and the movement of energy.
  3. Check the choice: The correct choice is A sequence showing how energy moves from one organism to another.

A food chain shows feeding relationships and the movement of energy.

9. QuestionMultiple choice

Where does most energy in an ecosystem begin?

Please select an answer first.

Correct answer: A

The correct answer is The Sun.

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: Plants use energy from the Sun to make food, beginning many food chains.
  3. Check the choice: The correct choice is The Sun.

Plants use energy from the Sun to make food, beginning many food chains.

10. QuestionMultiple choice

Which statement best describes an ecosystem?

Please select an answer first.

Correct answer: B

The correct answer is Living and nonliving parts interact and depend on one another..

  1. Read the ecosystem clue: Identify the living things, nonliving factors, or relationship described.
  2. Classify the role: Ecosystems contain interacting living organisms and nonliving factors.
  3. Check the choice: The correct choice is Living and nonliving parts interact and depend on one another..

Ecosystems contain interacting living organisms and nonliving factors.

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Frequently asked questions about Grade 3 Ecosystems

What is an ecosystem?

An ecosystem includes living things and the nonliving parts of an area that interact with one another.

What is the difference between a producer and a consumer?

A producer makes its own food, while a consumer gets energy by eating plants or other organisms.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 3 Ecosystems questions in total.