A food chain is a single path, which help us to work out who eats whom in a habitat, in order to get the energy and materials required for nutrition. Typically food chains involve around four steps. It is unusual for them to be longer because energy is lost between each step and so the energy available for the next organism decreases. Altering one link in a food web has big consequences for the whole system. SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. JOIN our platform at www.fuseschool.org These videos can be used in a flipped classroom model or as a revision aid. Find our other Biology videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://