IB ESS — Topic 2.4

Food chains & webs and trophic levels

Topic 2.4 covers how energy flows through ecosystems via food chains, food webs, and trophic levels. Students learn to construct and interpret food webs, identify producers and consumers, and understand why energy is lost at each trophic transfer.

Sub-topics in Topic 2.4

2.4.1Producers and consumers2.4.2Food webs

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