Trophic Level Interactions

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%

• 10%

• 100%

• 1000%

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%

• 90%

• 10%

• 20%

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NGSS.MS-LS2-3

Which of the following is a tertiary consumer in this food web?

• Rabbit

• Hedgehog

• Fox

• Bacteria

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NGSS.MS-LS2-3

Trophic levels are represented by 

• squares

• circles

• pyramids

• lines

Biomass refers to

• Chemical Energy

• Light Energy

• Rank in the feeding heirarchy

• Amount of living mass at the trophic level

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NGSS.MS-LS2-3

The process of plants using energy from the sun to create the first trophic level is called?

• Photosynthesis

• Chemosynthesis

• Cellular Respiratation

• Primary Producers

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NGSS.MS-LS1-6

Owls and snakes eat mice and other organisms. What would happen to the mice population if the owl population decreased?

• The population would decrease, as the loss of owls as part of their diet is a limiting factor.

• The population would decrease, as shelters created by owl nests is a limiting factor.

• The population would increase, as competition for food is a limiting factor.

• The population would increase, as predation by owls is a limiting factor.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

The chart shows predator and prey relationships in four different ecosystems.. Which is a correct example of a change that would happen to one population because of a change in the other population because of a predator/prey relationship?

• When the population of sharks decreases because of fishing, the population of small fish will decrease.

• When the population of sharks decreases because of fishing, the population of small fish will decrease.

• During hunting season when many deer are killed by hunters, the mountain lion population will decline.

• When the mice population increases due to having more resources, the population of snakes will decrease.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What would happen to the bird population if mouse population increased?

• Increase

• Decrease

• Stay the same

• What is a mouse?

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What would happen to all organisms on the food web if a disease killed off most of the grass?

• Increase

• Decrease

• Stay the same

• What is a disease?

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4