Ecosystem Energy and Matter Quiz

Which of the following is an example of a producer in a food web?

• Grass

• Rabbit

• Hawk

• Mushroom

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What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• Wind

• Soil

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Which term describes animals that eat only plants?

• Carnivores

• Herbivores

• Omnivores

• Decomposers

What happens to the population of rabbits if the amount of grass in an ecosystem decreases significantly?

• The rabbit population increases

• The rabbit population decreases

• The rabbit population stays the same

• The rabbit population becomes carnivorous

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Which of the following best describes the role of decomposers in a food web?

• They produce energy from sunlight

• They break down dead organisms and recycle nutrients

• They hunt and eat other animals

• They compete for sunlight

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Which of the following is a nonliving part of an ecosystem that is important for the cycling of matter?

• Water

• Deer

• Grasshopper

• Owl

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If a disease kills most of the mice in a food web, what is the most likely effect on the population of snakes that eat mice?

• The snake population will increase

• The snake population will decrease

• The snake population will stay the same

• The snake population will become producers

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NGSS.MS-LS2-1

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Which of the following is an example of a consumer in a food web?

• Oak tree

• Earthworm

• Sunlight

• Water

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A pond ecosystem has a sudden increase in algae due to fertilizer runoff. Using evidence, explain how this change could affect the populations of fish and aquatic insects in the pond.

• Fish and insects will both increase because there is more food.

• Fish and insects will both decrease due to less oxygen in the water.

• Only fish will increase, insects will decrease.

• There will be no effect on fish or insects.

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NGSS.MS-LS2-1

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Given a food web with grass, grasshoppers, frogs, and hawks, predict what would happen to the frog population if the grasshopper population suddenly decreased. Use reasoning to support your answer.

• Frog population would increase due to less competition.

• Frog population would decrease due to less available food.

• Frog population would stay the same.

• Frog population would become producers.

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NGSS.MS-LS2-1

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