How do energy and nutrients flow through an ecosystem? Give an example of a food chain and food web.

Energy enters an ecosystem from the outside(sun). Energy is converted to chemical energy and is passed from organism to organism through the ecosystem. Energy is lost to the surrounding through heat as it flows through the ecosystem and the heat energy cannot be recycled. Hence, energy has to be constantly supplied to the ecosystem. Living organisms in any ecosystem are made up of producers, consumers and decomposers. Energy and nutrients are transferred from producers to consumers to decomposers through feeding. The feeding relationships between organisms in an ecosystem is food chains. It is the transfer of energy from organism to organism through the form of food.

Example:

An example of a food web:
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