Decomposers and Nutrient Cycles
Grade 5 · Science · Ecosystems · Ontario, Canada
Lesson Summary
Learn how decomposers break down dead material and return nutrients to the soil.
Explanation
Decomposers are organisms like bacteria, fungi, and worms that break down dead plants and animals. As they do this, they release nutrients back into the soil, which plants use to grow. This creates a cycle: plants grow, animals eat plants, and when plants and animals die, decomposers recycle their nutrients. Without decomposers, dead material would pile up and the soil would run out of the nutrients plants need.
Practice Questions
Q1: Name two examples of decomposers.
Answer: Mushrooms (fungi) and earthworms. Bacteria are also decomposers.
Q2: What would happen if there were no decomposers?
Answer: Dead plants and animals would pile up, and nutrients would not return to the soil, so new plants would struggle to grow.
Q3: How do decomposers help plants?
Answer: They break down dead matter and release nutrients into the soil, which plants absorb through their roots to help them grow.
People Also Ask
What is Decomposers and Nutrient Cycles in Grade 5 Science?+
Decomposers and Nutrient Cycles is a lesson in the Ecosystems chapter of Grade 5 Science. It is part of the Ontario, Canada school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Decomposers and Nutrient Cycles?+
Decomposers and Nutrient Cycles is taught in Grade 5 as part of the Science curriculum in Ontario, Canada.
How can I help my child with Ecosystems in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Ecosystems topics.