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HomeEdexcel GCSE BiologyEcosystems and Material Cycles
Edexcel · GCSE · Biology · Revision Notes

Ecosystems and Material Cycles

56 words · Last updated July 2026

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What you'll learn

How ecosystems work and nutrients cycle.

Key ideas

  • Producers, consumers, decomposers; energy loss up food chains.
  • Biodiversity; the carbon, water and nitrogen cycles.

Exam tips

  • Explain energy loss between trophic levels.
  • Learn each cycle's key processes.

Common mistakes

  • Reversing energy flow.
  • Forgetting decomposers.
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