GCSE Food webs and food chains

This PowerPoint covers most of the GCSE level content students need to know from all of the main GCSE Science courses, including: what a food chain is, the role of plants on a food chain, definitions of terms such as top carnivore, producer and consumer, predator-prey cycles, numbering trophic levels in a food chain, pyramids of biomass, pyramids of number, how pyramids of number and biomass are different, energy flow in a food chain, pyramids of energy transfer, efficiency of a food chain, how energy is lost in a food chain, food webs, how a change in population affects others in a food web.