(I)GCSE Topic 4.7 Energy Efficiency

-A simple food chain would need a producer (grass), which would be eaten by the primary consumer (mice), which would be eaten by the secondary consumer (owl),
-The grass has 100kj which will be eaten by the mice but only 10kj from the original 100kj becomes part of the mice because it can only digest certain parts of the plant.
-The rest of the 90kj will be lost through respiration or faeces (undugested marerial).
-When the owl eats the mice, it will only be able to take in 1kj from the 10kj of the mice.