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3rd grade reading comprehension worksheet on biomes and ecosystems with questions about coral reefs and human impact on nature.
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Biomes and Ecosystems

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This printable worksheet gives 3rd graders five reading-comprehension questions about biomes and ecosystems. Students answer what an ecosystem is, compare ecosystem and biome sizes, explain what unbalanced a Caribbean coral reef, predict the effects of algae blooms, and discuss how humans can protect ecosystems. Useful for science reading practice or unit review.

Subject:
Science
Topic:
Environment
Grade Level:
3rd Grade
Updated May 2026

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