Grade 4 · Science · Lesson 2

Food Webs and Ecosystems

An ecosystem is a community of living things interacting with their environment. Every organism plays a role — and energy flows from one organism to the next in a food web.

What this lesson teaches

1Explain the roles of producers, consumers, and decomposers in an ecosystem
2Describe how energy flows through a food web
3Identify examples of each role from real ecosystems

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