Balanced Ecosystem - Reading Comprehension

What happens when a predator is removed from an ecosystem?

• The prey population might increase.

• The prey population might decrease.

• The ecosystem becomes more balanced.

• The invasive species are removed.

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What is an invasive species?

• A species that is native to the area.

• A species that is introduced from another area.

• A species that is endangered.

• A species that is a predator.

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NGSS.MS-LS2-4

What is the meaning of the word "role" as it is used in paragraph 1?

• an actor's part in a play

• to move an object by turning over and over

• the particular job or task someone or something has

• a dinner bread you eat

How can humans help keep ecosystems balanced?

• By introducing new species to the ecosystem.

• By creating protected areas for native species.

• By removing native species.

• By increasing the number of predators.

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What is the effect of adding an invasive species to an ecosystem?

• It helps native species to thrive.

• It uses up resources needed by native species.

• It decreases the biodiversity.

• It balances the ecosystem.

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Why is it important to keep ecosystems balanced?

• To increase the number of invasive species.

• To ensure the health of our planet.

• To decrease the number of native species.

• To make ecosystems more complex.

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What can lead to a loss of biodiversity in an ecosystem?

• Removing a species or adding an invasive species.

• Increasing the number of native species.

• Decreasing the number of predators.

• Introducing more prey species.

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What role do humans play in protecting ecosystems?

• They can introduce new species to ecosystems.

• They can create protected areas and remove invasive species.

• They can increase the number of predators.

• They can decrease the number of prey species.

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NGSS.MS-LS2-4

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