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Food Web Analysis Worksheet

Food webs and food chains are a basic, fundamental concept of ecology that nearly every student learns once or twice. However, there is a lot more behind the food web than simply "who eats who". This worksheet will take students through a portion of the complex food web found at Yellowstone National Park and have them work with concepts such as trophic level (producer - primary consumer - secondary consumer - tertiary consumer), energy flow, the Ten percent rule, decomposers, and keystone species.

All artwork in this worksheet was hand-drawn on commission by Brittany Breaux, an exceptionally-talented former student of mine.

Essential concepts: Food web, food chain, trophic level, producer, primary consumer, secondary consumer, tertiary consumer, decomposers, Ten percent rule, keystone species.

Answer Key: Available as part of a environmental science instructor resources subscription.

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