Exploring Ecosystems: Food Chains and More

What is the primary role of producers in a food chain?

• To decompose organic matter

• To convert solar energy into chemical energy

• To consume other organisms

• To recycle nutrients

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Which of the following is an example of a primary consumer in a food chain?

• Grass

• Rabbit

• Hawk

• Mushroom

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What role do decomposers play in an ecosystem?

• They produce energy from sunlight

• They consume primary consumers

• They break down dead organisms and recycle nutrients

• They are at the top of the food chain

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How are food webs different from food chains?

• Food webs show a single path of energy flow

• Food webs include only producers and consumers

• Food webs illustrate multiple interconnected food chains

• Food webs exclude decomposers

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NGSS.MS-LS2-3

In an energy pyramid, which level contains the most energy?

• Tertiary consumers

• Secondary consumers

• Primary consumers

• Producers

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What is the main source of energy for producers in an ecosystem?

• Chemical energy from other organisms

• Heat from the Earth's core

• Solar energy from the sun

• Energy from decomposing matter

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Which of the following best describes a secondary consumer?

• An organism that eats producers

• An organism that eats primary consumers

• An organism that decomposes organic material

• An organism that produces its own food

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NGSS.MS-LS2-3

What is the term for the position an organism occupies in a food chain?

• Energy level

• Trophic level

• Nutrient level

• Consumer level

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NGSS.MS-LS2-3

Which of the following organisms is most likely to be at the top of a food web?

• Grass

• Deer

• Lion

• Earthworm

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NGSS.MS-LS2-3

In a food web, what happens if a primary consumer population decreases significantly?

• Producers will increase

• Secondary consumers will decrease

• Decomposers will become primary consumers

• Tertiary consumers will increase

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