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==Key Stage 23==
===Meaning===
A '''food chain''' is a diagram used to show which creatures rely on each other for food in a [[habitat]].
===About Food Chains===
: A '''food chain''' always begins with a [[producer]] which is a creature that makes its own food, like [[plant]].
: A '''food chain''' usually ends with a [[Top Carnivore|top carnivore]] which is not eaten by other [[carnivore]]s.
: The [[producer]] in a '''food chain''' is always eaten by a [[consumer]].
: With each [[consumer]] the total energy gets smaller. When the primary consumer eats the producer it does not get all the energy because the producer used some of that energy in respiration. When the secondary consumer eats the primary consumer it does not get all the energy because the primary consumer used that energy for movement, it lost some energy in respiration and parts of its body cannot be digested by the secondary consumer.
===Producers and Consumers===