Food Chains — EdVibe Simulation

How to use: Click an organism to add it to your chain. You have to start with a producer (grass or tree), and each organism eats only the one before it — so chain levels must go up by one each time. The energy pyramid on the right shows how much energy is left at each level: about 90% is lost between links.

Notice: energy flows one way through a food chain, and most of it is lost at each step — as heat, movement and waste. That's why food chains rarely have more than four or five links, and why top predators need a huge area to find enough energy.