Biology Made Fun · Go Further
Unit 9: Ecology — Energy & Cycles
The companion to Unit 9 in Biology Made Fun — the code printed on page 93, the unit's Big Picture opener. Guiding question: How do energy and matter move through a living community?
Animation — Ecology — Energy & CyclesThe concept animation for this unit will be embedded here.
Key ideas from the lesson
- Producers make their own food, usually by photosynthesis — they capture sunlight and store it as food energy at the base of the system.
- Consumers eat others for energy: herbivores eat plants, carnivores eat other animals, omnivores eat both.
- Only about a tenth of the energy passes up each level of a food chain: 100 units at the producers become about 10 in the herbivores and about 1 in the carnivores. The rest was spent living — moving, growing, staying warm.
- Decomposers break down dead matter and return nutrients to the soil, which is how matter cycles back to the producers instead of running out.
- Energy flows one way through a community and is lost at every step; matter — carbon included — cycles and is used again.
Why this helps
Unit 9's guiding question splits in two: energy moves through a community once, shrinking at every step, while matter like carbon goes around and around. This page animates both movements at once — the pyramid draining, the cycle turning.
Try this
Start with 100 units of energy at the producers and run the unit's math up two levels. Then name the group of organisms that keeps matter from running out, and say what they return to the soil. Check both answers against the unit's See It page.
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