Ecosystems
Free ESAT Biology lesson. Worked examples, common mistakes and a self-check.
What the lesson covers
- Organisation, abiotic and biotic factors (B10.1)
- Food chains, webs and energy (B10.1)
- Pyramids and energy transfer (B10.1)
- The carbon cycle (B10.2)
- The water cycle (B10.2)
- Biodiversity and sampling (B10.3)
- Human impacts: fish farming, acid rain, eutrophication (B10.3)
- Self-check questions with answers (8)
Specification: B10.1-10.3. Codes follow the UAT-UK ESAT content specification.
How to use it
- Read a section, then cover the worked example and try it yourself.
- Check the common mistakes list: these are the slips the real test is built to catch.
- Do the self-check without looking back. Mark it against the answers.
- Then practise the topic under time, with the matching practice set.
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