Food Webs,Food Chains and Energy Flow Article

Explain how energy flows through a food chain and why there are usually fewer animals at the top of a food chain.

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Analyzing

Evaluate the impact of removing a primary consumer from a food web. What might happen to the ecosystem?

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Evaluating

How does the 10% rule affect the structure of a food web?

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Applying

Which of the following best describes the role of decomposers in an ecosystem?

• They produce energy for primary consumers.

• They break down dead organisms and return nutrients to the soil.

• They are at the top of the food chain.

• They consume primary consumers.

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Analyzing

What is the primary difference between a food chain and a food web?

• A food chain is more complex than a food web.

• A food web shows multiple interconnected food chains.

• A food chain includes decomposers, while a food web does not.

• A food web only includes producers and consumers.

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Why is it important to protect producers in an ecosystem?

• They are at the top of the food chain.

• They provide energy for all other organisms in the ecosystem.

• They decompose dead organisms.

• They are not important for the ecosystem.

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Evaluating

What might happen to a food web if a new predator is introduced?

• The food web will remain unchanged.

• The new predator will become a producer.

• The balance of the ecosystem may be disrupted.

• All primary consumers will become secondary consumers.

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