TCAP Review -- Food Webs & Chains / Environmental Organization

In a food web, what happens to the amount of energy as it moves from one trophic level to the next?

• It increases by 90%

• It stays exactly the same

• It decreases by approximately 90%

• It doubles at each level

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which organisms form the foundation of most food webs?

• Herbivores

• Producers

• Carnivores

• Decomposers

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NGSS.MS-LS2-3

Why do energy pyramids have a broad base and narrow top?

• Because predators are smaller than prey

• Because there are fewer producers than consumers

• Because energy is lost at each trophic level

• Because decomposers break down all organisms

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What percentage of energy is typically available to the next trophic level?

• About 10%

• About 50%

• About 75%

• About 90%

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of these best describes the role of decomposers in energy transfer?

• They create energy from sunlight

• They transfer energy back to producers

• They store most of the ecosystem's energy

• They only consume dead plant matter

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NGSS.MS-LS2-3

What is the primary source of energy in most food webs?

• Water

• Soil minerals

• The Sun

• Dead organisms

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

How do producers transform energy in an ecosystem?

• By eating other organisms

• By converting sunlight into chemical energy

• By breaking down dead matter

• By consuming only plants

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What happens to the majority of energy at each trophic level?

• It is stored for later use

• It is passed to predators

• It is lost as heat

• It is converted to water

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

In a food web, which statement about energy flow is correct?

• Energy flows in circles

• Energy flows in one direction

• Energy can be reused indefinitely

• Energy increases at each level

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What role do primary consumers play in energy transfer?

• They create energy through photosynthesis

• They break down dead organisms

• They convert plant matter into animal biomass

• They produce energy from minerals

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NGSS.MS-LS2-3