What is the main source of energy for most food chains on Earth?

• The Moon

• The Sun

• The Wind

• The Soil

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which organism is always at the base of an energy pyramid?

• Herbivore

• Producer

• Carnivore

• Decomposer

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In a food web, what do arrows show?

• The direction of energy flow

• The size of the animals

• The speed of the animals

• The color of the animals

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is an example of a decomposer?

• Grass

• Mushroom

• Rabbit

• Hawk

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NGSS.MS-LS2-3

Which level of an energy pyramid has the least amount of energy?

• Level One, Producers

• Level Two, Primary consumers

• Level Three, Secondary consumers

• Level Four, Tertiary consumers

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NGSS.MS-LS2-3

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

• It increases

• It stays the same

• It decreases

• It disappears

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why are decomposers important in a food web?

• They produce energy from sunlight

• They break down dead organisms and recycle nutrients

• They eat only plants

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NGSS.MS-LS2-3

A student claims that removing all decomposers from an ecosystem would not affect the food web. Use your knowledge to evaluate this claim.

• The claim is correct because decomposers are not important

• The claim is incorrect because decomposers recycle nutrients needed by producers

• The claim is correct because producers make their own food

• The claim is incorrect because decomposers eat only meat

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NGSS.MS-LS2-3

NGSS.MS-LS2-4