Food Webs & Energy Transfer

What is the role of a producer in an ecosystem?

• It eats other organisms for energy.

• It breaks down dead material for nutrients.

• It makes its own food through photosynthesis.

• It moves energy between trophic levels.

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NGSS.MS-LS2-3

Consumers are organisms that only produce their own food.

• True

• False

Which of the following is an example of a decomposer?

• Oak tree

• Lion

• Mushroom

• Rabbit

The total mass of living matter at a given trophic level is called (a)   .

What happens to energy as it moves through trophic levels in a food web?

• It is completely recycled.

• It is stored in the same amount at each level.

• Some energy is lost as heat at each level.

• Energy increases at higher trophic levels.

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NGSS.MS-LS2-3

Food webs show how energy moves through an ecosystem.

• True

• False

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of these organisms is a primary consumer?

• Grass

• Deer

• Hawk

• Earthworm

Tags

NGSS.MS-LS2-2

What might happen if a species is removed from a food web?

• The ecosystem becomes more balanced.

• All other species increase in population.

• Population balance and biodiversity can be disrupted.

• Energy transfer improves at all levels.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

A field ecosystem includes grass, rabbits, and foxes. If the rabbit population decreases, what is likely to happen to the fox population?

• It will increase rapidly.

• It will decrease due to lack of food.

• It will remain the same.

• It will switch to eating plants.

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NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which level in a food web has the most available energy?

• Producers

• Primary Consumers

• Secondary Consumers

• Tertiary Consumers

Tags

NGSS.MS-LS2-3