5.1.1 Define species, habitat, population, community, ecosystem and ecology

5.1.2 Distinguish between autotroph and heterotroph

5.1.3 Distinguish between consumers, detritivores and saprotrophs

5.1.4 Decribe what is meant by a food chain

5.1.4 Give three examples of a food chain each with at least three linkages

5.1.5 Describe what is meant by a food web

5.1.6 Define trophic level

5.1.6 What are the four trophic levels?

5.1.7 Deduce the trophic levels of organisms in a food web and food chain

5.1.8 Construct a food web containing up to 10 organisms, using appropriate information

5.1.9 State which is the initial source of energy for nearly all communities.

5.1.10 Explain the energy flow in a food chain

5.1.10 Draw an energy flow diagram of a food chain.

5.1.11 State how efficient energy transformations are.

5.1.12 Explain the reason for the shape of pyramids of energy

5.1.13 Explain that energy enters and leaves ecosystems, but nutrients must be recycled

5.1.14 State what saprotrophic bacteria and fungi (decomposers) recycle