NGSS.HS-LS2-4

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.HS-LS2-4

NGSS.HS-LS2-3

The primary consumer in this food chain is the ____________.

• Frog
• Eagle
• Grasshopper
• Python

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NGSS.HS-LS2-4

If there is 1000 Kcal for the producers, how much energy would be transferred to the Primary Consumers?

• 10 Kcal

• 1 Kcal

• 100 Kcal

• 1000 Kcal

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NGSS.HS-LS2-4

NGSS.HS-LS2-3

If grass stores 1,000 energy units received from the sun, the ecological efficiency of the ecosystem is 10%, and the trophic levels are grass ® cow ® human, how many units of energy does the human receive of the original 1,000 units?

• 900

• 200

• 100

• 10

• 1

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NGSS.HS-LS2-4

___% of energy is passed on to the next level in the food chain/pyramid?

• 10%

• 20%

• 50%

• 90%

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NGSS.HS-LS2-4

NGSS.HS-LS2-3

Which organisms have the most available energy in an energy pyramid?

• Producers

• Consumers

• Decomposers

• Detritivores

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NGSS.HS-LS2-4

Which of the following best explains why terrestrial trophic pyramids usually do not have levels higher than tertiary consumers?

• Tertiary consumers are the largest organisms in an ecosystem and require the most space to survive.

• Plants can only perform photosynthesis during the day, so tertiary consumers cannot get enough energy from consuming plants.

• A large proportion of energy is lost as heat as it is transferred up the pyramid, so there is not enough energy available to support another level.

• Tertiary consumers are often indicator species and are the first to be affected by environmental disturbances.

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NGSS.HS-LS2-4

In a given ecosystem, producers convert solar energy into 15,000kcal of chemical energy stored in organic compounds. Which of the following is the most likely amount of energy available to secondary consumers?

• 1.5 kcal

• 150 kcal

• 1,500 kcal

• 13,500 kcal

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NGSS.HS-LS2-4

Why are autotrophs so crucial to an ecosystem?

Support your answer with QUANTITATIVE data and use these vocabulary words:

Rule of 10%

Producers

Primary consumers

Secondary consumers

Tertiary consumers

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NGSS.HS-LS2-4

There are 40,000g of biomass energy available on the producer level. How much energy is available for the tertiary consumer?

• 400,000g

• 4,000g

• 400g

• 40g

• 4g

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NGSS.HS-LS2-4