5(b)
5(b) Feeding relationships
4 specification points in sub-topic 5(b).
Specification points
5.65.75.85.9
5.6: Trophic levels
Trophic levels: producers, consumers and decomposers.
5.7: Food chains, webs and pyramids
Food chains, food webs, and pyramids of number, biomass and energy.
5.8: Transfer along a food chain
How substances and energy pass along food chains when organisms are eaten.
5.9: Energy transfer between trophic levels
Why only about 10% of energy passes to the next trophic level, and where the rest goes.