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Grade 6 Science · Ecosystems

Grade 6 Ecosystems Practice Test

Build Grade 6 Science skills with five 10-question practice tests on biotic and abiotic factors, habitats, populations, communities, interactions, carrying capacity, and biodiversity.

Ecosystems Practice Tests

These Grade 6 Science practice tests help students understand how organisms interact with one another and with nonliving parts of their environment. Students practice biotic and abiotic factors, habitats, populations, communities, producers, consumers, decomposers, competition, symbiosis, carrying capacity, biodiversity, and ecosystem change.

Skills covered

  • Identifying biotic and abiotic ecosystem factors
  • Distinguishing organisms, populations, communities, habitats, and ecosystems
  • Explaining the roles of producers, consumers, and decomposers
  • Analyzing competition, predation, symbiosis, and limiting factors
  • Understanding carrying capacity and biodiversity
  • Using observations and data to explain ecosystem changes

How to use these practice tests

Begin by identifying whether each factor is living or nonliving. Then classify the level of organization and examine the relationship described. For population questions, look for resources, limiting factors, evidence of change, and how one population may affect others in the ecosystem.

For more Grade 6 Science practice, return to the Grade 6 Science category.

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Grade 6 Ecosystems Practice Tests

A 10-question Grade 6 Science practice test on ecosystems, biotic and abiotic factors, habitats, populations, communities, interactions, carrying capacity, and biodiversity.

Identify ecosystem components, analyze relationships among organisms and environmental factors, and use evidence to explain population and ecosystem changes.

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

What is a producer?

Please select an answer first.

Correct answer: A

The correct answer is An organism that makes its own food, usually using light energy.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Producers such as plants use photosynthesis to make food.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Producers such as plants use photosynthesis to make food.

2. 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. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: A consumer obtains energy by eating other organisms or their products.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

A consumer obtains energy by eating other organisms or their products.

3. QuestionMultiple choice

What is the role of a decomposer?

Please select an answer first.

Correct answer: C

The correct answer is To break down dead organisms and return materials to the environment.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Decomposers recycle materials by breaking down dead matter and waste.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Decomposers recycle materials by breaking down dead matter and waste.

4. QuestionMultiple choice

Which organism is most likely a decomposer?

Please select an answer first.

Correct answer: D

The correct answer is A fungus growing on a fallen log.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Fungi break down dead material and help return nutrients to the ecosystem.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Fungi break down dead material and help return nutrients to the ecosystem.

5. QuestionMultiple choice

Why are producers important to an ecosystem?

Please select an answer first.

Correct answer: A

The correct answer is They introduce energy-rich food into the ecosystem..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Producers convert energy into food that can support consumers.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Producers convert energy into food that can support consumers.

6. QuestionMultiple choice

How do consumers obtain energy?

Please select an answer first.

Correct answer: B

The correct answer is By eating plants, animals, or other organisms..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Consumers get usable energy from food made by producers or obtained from other consumers.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Consumers get usable energy from food made by producers or obtained from other consumers.

7. QuestionMultiple choice

What happens to nutrients when decomposers break down a fallen leaf?

Please select an answer first.

Correct answer: C

The correct answer is Nutrients are returned to soil or water and can become available to other organisms..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Decomposition recycles matter through the ecosystem.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Decomposition recycles matter through the ecosystem.

8. QuestionMultiple choice

Which sequence shows a common ecosystem role order?

Please select an answer first.

Correct answer: D

The correct answer is Producer, consumer, decomposer.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Energy enters through producers, moves to consumers, and materials are recycled by decomposers.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Energy enters through producers, moves to consumers, and materials are recycled by decomposers.

9. QuestionMultiple choice

What might happen if decomposers disappeared from a forest?

Please select an answer first.

Correct answer: A

The correct answer is Dead matter would accumulate and nutrients would be recycled more slowly..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Without decomposers, dead material would build up and nutrient cycling would be disrupted.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Without decomposers, dead material would build up and nutrient cycling would be disrupted.

10. QuestionMultiple choice

Why is a mushroom important in a forest ecosystem?

Please select an answer first.

Correct answer: B

The correct answer is It can decompose dead material and help recycle nutrients..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Many mushrooms act as decomposers that return materials to the ecosystem.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Many mushrooms act as decomposers that return materials to the ecosystem.

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Frequently asked questions about Grade 6 Ecosystems

What topics are covered?

The page covers biotic and abiotic factors, habitats, populations, communities, producers, consumers, decomposers, interactions, limiting factors, carrying capacity, biodiversity, and ecosystem investigations.

How should students study ecosystems?

Practice classifying living and nonliving factors, tracing relationships among organisms, and explaining how resources and environmental changes affect populations.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 6 Ecosystems questions in total.