Fortnite: Ecosystem Test Review

A beaver relies on various plants in an ecosystem to survive. Which would most likely happen if a drought decreased the plant population?

• The beaver population would increase.

• The beaver population would decrease.

• The beaver population would stay the same.

• The beaver population would increase, then decrease quickly.

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NGSS.MS-LS2-1

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The diagram shows an aquatic food chain. Which will most likely occur if there is overfishing and a loss of oysters?

• The amount of algae would increase and the number of bass would increase.

• The amount of algae would decrease and the number of bass would increase.

• The amount of algae would increase and the number of bass would decrease.

• The amount of algae would decrease and the number of bass would decrease.

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NGSS.MS-LS2-3

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The diagram shows a simple deciduous forest food chain. If a predator of the owl were introduced to the ecosystem, which would most likely happen?

• The grass population would increase.

• The owl population would increase.

• The mouse population would increase.

• The mouse population would decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

This food chain shows organisms in a classroom aquarium. Which would benefit if the fish living in the aquarium were removed?

• algae

• crayfish

• fish

• plants

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Which characteristic differs the most between a forest and a grassland ecosystem?

• the amount of salt

• the amount of trees

• the amount of sunlight

• the amount of organisms

How are grasslands and estuaries most alike?

• They both support marine life.

• They both have wide open areas.

• Lightning strikes easily start fires in both.

• Trees prevent growth of smaller plants in both.

Which best describes the differences between an ocean and a lake ecosystem?

• an ocean ecosystem is brackish water; a lake ecosystem is freshwater

• an ocean ecosystem is salt water; a lake ecosystem is brackish water

• an ocean ecosystem is salt water; a lake ecosystem is freshwater

• an ocean ecosystem is freshwater; a lake ecosystem is salt water

How are bacteria classified in a forest ecosystem?

• as consumers

• as decomposers

• as herbivores

• as producers

Decomposers are important to the flow of energy in an ecosystem because they

• are at the top of the food chain.

• eat things other organisms don't eat.

• make up a large portion of the top layer of soil.

• break organic material into parts that can be reused.

Tags

NGSS.MS-LS2-3

A raccoon eats a variety of foods including berries, insects, and small animals. Which BEST describes a raccoon?

• producer

• herbivore

• carnivore

• omnivore