Comparing Ecosystems

A disease reduces the number of young salmon in a river. Which population will MOST likely increase as a result?

• trout and eagle

• algae and trout

• sculpin and algae

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NGSS.MS-LS2-1

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Which lists animals that live in an aquatic ecosystem?

• black bear, deer, vole

• ducks, turtles, amphibians

• panthers, monkeys, snakes

Bryson is comparing two different ecosystems and creates the following list of similarities: aquatic, diverse fish life, high salt concentration, plentiful light at the water's surface. Which two ecosystems is Bryson most likely comparing?

• ocean and lake

• estuary and ocean

• grassland and pond

Which is a difference between abiotic and biotic factors?

• Abiotic factors are plants and biotic factors are animals.

• Abiotic factors are all living things and biotic factors are all nonliving things.

• Abiotic factors are all nonliving things and biotic factors are all living things.

Deserts, mountains, and rivers are all examples of ________.

• vacation spots

• tundra

• ecosystems

• wetlands

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What type of ecosystem is this?

• tundra

• desert

• wetland

Which is most accurate in describing an estuary ecosystem?

• High salt levels keep the water clear of nutrients and proteins.

• Freshwater mixes with saltwater to provide a nutrient-rich environment.

• Cold water mixes with saltwater to create a cooling effect that encourages growth.

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Which ecosystem is most similar to an estuary?

• salt marsh

• ocean

• pond

Which ecosystem has lifeforms most similar to those of the ocean?

• estuary

• lake

• pond

• swamp

An ecosystem where water covers the soil or water is near the surface of the soil is called

• a desert

• an ocean

• an estuary

• a wetland

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