Energy Pyramid Lesson

Which of the following animals is a primary consumer?

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• 
• 
• 

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NGSS.MS-LS2-3

Virtually all plants are autotrophic. But there are no autotrophic animals or fungi. What can you infer about autotrophic organisms?

• They can move around on their own.

• They are at the top of the food chain.

• They can make their own energy.

• They reproduce slowly.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In one cubic meter of the ocean, photosynthetic plankton produce 80,000 calories of energy each year. How many calories of energy are available in the bodies of the creatures that eat that plankton?

• 80,000

• 8,000

• 800

• 80

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NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A raccoon consumes 500 calories of food. 50 of those calories are converted to biomass. In other words:

• 50 calories turn into plant matter.

• 50 calories leave the raccoon's body as waste.

• It uses 50 calories of energy to keep warm, reproduce, and keep warm.

• 50 calories of energy are stored in it's body.

In most food chains, all of the energy originally comes from:

• plants

• dead matter that has been recycled by decomposers

• heat from within the Earth

• the sun

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In any ecosystem, there are always more:

• herbivores than carnivores

• predators than prey

• animals than plants

• heterotrophs than autotrophs

In an area off the Antarctic coast, elephant seals consume 200,000 calories of squid and small fish every month. How much energy must these squid and small fish consume to sustain the elephant seal population?

• 400,000

• 1 million

• 2 million

• 20 million

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which organisms do primary consumers mainly eat?

• producers

• secondary consumers

• predators

• decomposers

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NGSS.MS-LS2-2

In many cases, secondary consumers cannot digest the bones of their prey. What conclusion can you draw from that?

• Eventually all of the energy in those ecosystems will go towards bone formation.

• No energy is required to form bones.

• Energy used to create bone mass often does not travel farther up the food chain.

• Primary consumers form bones from the parts of the plants they cannot digest.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

In a marine food chain, small fish eat plankton, big fish eat small fish, and sharks eat big fish. Which organism has the smallest population?

• the plankton

• the small fish

• the big fish

• the sharks

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4