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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 competition?

Please select an answer first.

Correct answer: A

The correct answer is An interaction in which organisms seek the same limited resource.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Competition occurs when organisms need the same limited food, water, space, or other resource.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Competition occurs when organisms need the same limited food, water, space, or other resource.

2. QuestionMultiple choice

Which example is competition within one species?

Please select an answer first.

Correct answer: B

The correct answer is Two deer compete for the same patch of grass..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: The deer are members of the same species competing for a shared food resource.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

The deer are members of the same species competing for a shared food resource.

3. QuestionMultiple choice

What is predation?

Please select an answer first.

Correct answer: C

The correct answer is An interaction in which one organism hunts and eats another organism.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Predation is a consumer interaction in which one organism captures and eats another.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Predation is a consumer interaction in which one organism captures and eats another.

4. QuestionMultiple choice

Which example shows mutualism?

Please select an answer first.

Correct answer: D

The correct answer is A bee gets nectar while a flower is pollinated..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Both the bee and the flower benefit from the interaction.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Both the bee and the flower benefit from the interaction.

5. QuestionMultiple choice

What is a limiting factor?

Please select an answer first.

Correct answer: A

The correct answer is A condition that restricts the size or growth of a population.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Food, water, space, disease, and temperature can limit population growth.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Food, water, space, disease, and temperature can limit population growth.

6. QuestionMultiple choice

Which change could increase competition among plants?

Please select an answer first.

Correct answer: B

The correct answer is A long drought that leaves less water in the soil.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Less water creates a more limited resource, so plants may compete more strongly.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Less water creates a more limited resource, so plants may compete more strongly.

7. QuestionMultiple choice

How can disease affect a population?

Please select an answer first.

Correct answer: C

The correct answer is It can reduce the number of healthy individuals and limit population growth..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Disease can reduce survival or reproduction and therefore affect population size.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Disease can reduce survival or reproduction and therefore affect population size.

8. QuestionMultiple choice

What is a symbiotic relationship?

Please select an answer first.

Correct answer: D

The correct answer is A close relationship between organisms of different species.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: Symbiosis describes close interactions between different species, including mutualism, commensalism, and parasitism.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

Symbiosis describes close interactions between different species, including mutualism, commensalism, and parasitism.

9. QuestionMultiple choice

Which interaction benefits one organism while harming another?

Please select an answer first.

Correct answer: A

The correct answer is Parasitism.

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: A parasite gains resources from a host, while the host is harmed.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

A parasite gains resources from a host, while the host is harmed.

10. QuestionMultiple choice

Why can one population affect many other populations?

Please select an answer first.

Correct answer: B

The correct answer is Populations are connected through shared resources and interactions..

  1. Identify the ecosystem concept: Determine whether the question asks about an organism, population, community, habitat, or environmental factor.
  2. Use the relationship: A change in one population can alter food, competition, predation, or habitat conditions for others.
  3. Check the system: Consider how living and nonliving parts interact and affect the stability of the ecosystem.

A change in one population can alter food, competition, predation, or habitat conditions for others.

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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.