Unit 13-15 Review

The number and types of predators can affect the size of a population in an ecosystem.

• True

• False

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NGSS.MS-LS2-2

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Are predators classified as biotic or abiotic factors in an ecosystem?

• Biotic

• Abiotic

Which organisms in this food web feed at more than one trophic level?

• Bear

• Chipmunk

• Red-Tailed Hawk

• Grasses

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NGSS.MS-LS2-2

What happens to the amount of energy as you move up an energy pyramid?

• It increases.

• It decreases.

• It stays the same.

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NGSS.MS-LS2-3

Which trophic level contains the most amount of energy in an energy pyramid?

• tertiary consumers

• primary consumers

• producers

• secondary consumers

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NGSS.MS-LS2-3

A predator population decreases due to human disturbances. What effect would this have on the prey population?

• It would stay the same.

• It would decrease.

• It would increase.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

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Only 10% of the available energy is transferred between trophic levels in an energy pyramid. (The Rule of 10) 90% of the energy is "lost" to the environment as ______ energy.

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NGSS.MS-LS2-3

Energy in a food chain is transferred from one organism to another.

• True

• False

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NGSS.MS-LS2-3

What factors could cause a population to decrease in size?

• Birth rate is higher than the death rate.

• Limiting factors (competition for resources)

• Death rate is higher than the birth rate.

• Immigration increases to an area.

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NGSS.MS-LS2-4

Why would population growth decline if population size goes above the carrying capacity in an ecosystem?

• Unlimited resources

• Higher birth rate

• Competition for resources

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NGSS.MS-LS2-1

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