C4.2.3—Chemical energy flow Topic Practice
C4.2.3—Chemical energy flow Topic Practice
Practise explaining one-way chemical energy flow through ecosystems, including photosynthesis, feeding, heat loss and why energy is not recycled.
How this is tested
- explain how light energy becomes chemical energy and passes through feeding links
- distinguish energy flow from nutrient cycling in ecosystem questions
- interpret food-chain examples where respiration, heat loss or biomass loss is tested