Decomposers at Work Worksheets for 4th and 5th Grade

What your child practices

This 4th and 5th grade science set (Grades 4 to 5 in Canada) explores Decomposers at Work through 6 worksheets and 59 questions. In grades 3 to 5, science asks children to explain why things happen, not only what happens, and Decomposers at Work is a great place to practice that kind of thinking. It opens with a guided Learn and Practice page, moves on to a practice sheet and a review test, then finishes with two quick quizzes and a mixed review. It is aligned to NGSS 5-LS2-1, which focuses on ecosystems and how living things depend on each other. In Canada it matches the BC curriculum for Grade 3. Each PDF includes its own answer key on page 2, ready for you or your child to check. Finished a sheet? The online version reads every question aloud and checks answers instantly.

Tips for parents

• Ask your child to explain the idea using a diagram or a quick sketch.
• Let your child predict an answer before reading, then check if the prediction held up.
• Connect Decomposers at Work to something at home: the kitchen, the yard or the sky tonight.