Flow of Energy in a Food Web

What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.

• The number of producers would increase.

• The number of primary consumers would increase.

• The number of secondary consumers would increase.

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An organism that needs to eat other organisms to obtain energy is known as a __________.

• autotroph

• consumer

• producer

• mutualist

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The Krill is eaten by which consumer?

• blue whale

• leopard seal

• squid

• crab

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Which of the following organisms is a producer?

• fox

• eagle

• snake

• grass

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Which of the following organisms uses photosynthesis to get the energy it needs to survive?

• grasshopper

• mouse

• grass

• deer

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What does a food chain represent?

• How all living organisms within a habitat are connected.

• How plants create their own food.

• All of the things that a particular animal eats.

• A single path of energy transfer within a habitat.

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A student researching a northern forest ecosystem learns the following information about feeding relationships in the ecosystem.

Which food web best represents the flow of energy in these feeding relationships?

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Fox squirrels are common in Texas. Fox squirrels primarily eat acorns and nuts from trees but also eat insects. Some predators of fox squirrels include owls, snakes, and bobcats.

Which diagram best represents how energy would flow to and from the fox squirrel?

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The diagram below shows an energy pyramid. In a marine ecosystem, algae carry out photosynthesis. Barracuda eat snapper fish. Reef sharks eat barracuda.

Which organism would be at the top of the energy pyramid?

• algae

• reef shark

• barracuda

• snapper fish

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The figure below shows a food chain that might exist in a meadow.

Which of the following best describes what the food chain represents?

• how an organism might change over time

• the movement of organisms throughout the ecosystem

• the increase in size among organisms in the ecosystem

• the path of energy transfer from producers to consumers

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