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  • Stage 1

    Answer 3 questions correctly in a row.

Food chains are models that show how organisms in an ecosystem can get their food. You can use a food chain to predict how populations of organisms will affect one another.
This food chain shows organisms in a grassland ecosystem.
slender wheatgrass
pocket gopher
bull snake
golden eagle
Use the food chain to complete the text below.
If the population of bull snakes increases, pocket gophers will have
predators. If this happens, pocket gophers will be
likely to survive and produce offspring.
ref_doc_title.

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