Ecosystems Review 5.L.2

Which organism is a producer?

• apple tree

• butterfly

• mushroom

• fox

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In a food chain hawks consume snakes and mice. If the mouse population

stays the same, but the snake population decreases, what could happen

to the number of foxes?

• The number of foxes could decrease because they will eat fewer mice

• The number of foxes could increase because they will only have mice to

  eat.

• The number of foxes could decrease because they will compete more for

  available food.

• The number of foxes could increase because they will compete less for

  available food.

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A local park has a lake with green algae floating in it. What is the role of the algae in this aquatic ecosystem?

• decomposer

• omnivore

• consumer

• producer

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Which is an example of a consumer eating another consumer in an grassland

ecosystem?

• A fox eating a rabbit

• A rabbit eating grass

• An earthworm eating decaying leaves

• A mouse eating seeds

How are bison and wolves classified?

• as decomposers

• as carnivores

• as producers

• as consumers

Which ecosystem would most likely be home to crabs and oysters?

• estuary

• forest

• grassland

• lake

Which two ecosystems are most similar to one another?

• grassland and forest

• pond and lake

• ocean and forest

• desert and pond

In which ecosystem can you find a mix of salt water and freshwater?

• estuaries

• lakes

• oceans

• ponds

Which best describes a difference between estuaries and ponds?

• Ponds flow into the ocean and estuaries do not.

• Ponds have salt water and estuaries have brackish water.

• Ponds are freshwater and estuaries are brackish water.

• Ponds are affected by tides and estuaries are not.

5.Why are salt marshes and estuaries important for ocean life?

• They minimize damage to oceans during hurricanes.

• They filter salt out of river water before it enters the oceans.

• They provide safe, nutrient-rich breeding areas for ocean organisms.

• They increase the amount of sediment able to settle on the ocean

  floor.

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