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Printable science worksheet about decomposers with a reading passage and questions on how they break down waste in nature.
Worksheet

Decomposers and Ecosystems

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This science worksheet teaches students about decomposers through a short reading passage on why garbage smells. Students answer questions about the three effects decomposers have, identify where decomposers are found beyond garbage cans, and complete true-or-false statements. Useful for science lessons on ecosystems, life cycles, or environmental science units.

Subject:
Science
Topic:
Biology
Grade Level:
3rd Grade
Updated June 2026

Word Bank

  • decomposers : organisms that break down and feed on waste and the remains of plants and animals

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