This film explains how plants and animals obtain energy from food, highlighting the energy needs of various creatures like ...

The initial source of energy for all food chains is the sun. A food chain always starts with a producer. A producer is an organism that makes its own food. Most food chains start with a green ...

Image caption, This food chain shows a leaf is eaten by a worm, which is then eaten by a bird. The arrow means 'is eaten by'. Producers covert energy from the Sun into food. Plants are at the ...