Food Chains?

Babette Deloe: I could have swore I just answered this...The higher up you go in a food chain, the less energy is received from the food. This is because, each level, about 90% of the energy is lost as heat. So, when there's an organism way up high at the top of a really long food chain, it will get hardly any energy at all and waste more energy obtaining its food than it gets consuming it.Basically, long food chains are less effective and really not helpful for the organisms at the top. However, shorter ones allow each organism to receive more energy from the food it consumes. Of course, the more useful food chain (the shorter one) will then be more common.This is why there is really usually only three (maybe four) levels in a food chain....Show more

Cuc Gire: Food chains- It is when a smaller animal eats a plant, it gets eaten up by a bigger animal like if the rat eats a plant, it gets eaten up by a snake, then gets eaten up by a foot sized bird, then the foot siz! ed bird gets eaten by a bigger bird then the bigger bird eats eaten by the biggest bird and nothing will eat the biggest bird.