The ultimate source of all energy we use on the Earth is the Sun. Through a system of transfers, this energy moves from one living organism to another. All life is connected in delicate balances called ecosystems . Living things do one of three different jobs to maintain ecosystems they are either producers, consumers, or decomposers. This process is called photosynthesis and turns the sun's energy into a form that living things can use.
Green plants provide energy, in the form of food, and oxygen for other living things.
Producers include trees, bushes, grasses, plants and flowers. Consumers include birds, frogs, squirrels, rabbits, deer, mice, coyotes, bears, and of course humans. Decomposers include bacteria, fungi, earthworms and snails. The interaction among organisms in an ecosystem allows energy to be transferred from one living thing to another, ultimately returning some of the energy and abiotic elements to the Earth where is starts the cycle all over again. This activity is a fast-paced game of tag to demonstrate the interrelation of living things.