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9.2 Energy transfer and biodiversity
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Food chains, trophic levels and biomass

Food chains, trophic levels and biomass

Food chain of grass to grasshopper to frog to heron beside a biomass pyramid with trophic levels and energy losses labelled An ecosystem is a community of organisms interacting with each other and with the non-living environment. Biodiversity means the variety of living organisms in an area.

9.2 Energy transfer and biodiversity Lesson

  1. GCSE
  2. /Biology
  3. /9.2 Energy transfer and biodiversity

Step-by-step lessons covering Edexcel GCSE Biology 9.2 Energy transfer and biodiversity for Foundation and Higher tier. Each lesson breaks down 9.2.1 Energy transfer between trophic levels, 9.2.2 Efficiency of energy transfers, 9.2.3 Human interactions and biodiversity, 9.2.4 Benefits of maintaining biodiversity, and 9.2.5 Biological factors affecting food security, then works through exam-style questions in Paper 1 and Paper 2 format. Start with the foundational topics and build up to the higher-tier material.