It also implies the transfer of food energy from its source in plants through herbivores to carnivores (Krebs 2009). Normally, food webs consist of a number of food chains meshed together.

Energy is transferred along food chains, however, the amount of available energy decreases from one trophic level to the next. The reason for this is that only around 10 per cent of the energy is ...

After the clip the distinction between feeding and energy transfer could be introduced and pupils could be given additional labels such as consumer to try and label their original food chain.