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Where does the energy for food chains come from? (1 mark)
The dry mass of living material in an organism
It is lost as heat in movement and respirationIt is lost in faeces and urineNot all parts of the plant or animal are eatenNot all of the organisms at each level are eaten
Draw a pyramid of biomass for the food chain (3 marks - to scale)
If graph paper is given draw to scale – if not don’t worryUse numbers with Kg next to themDecide on a scale that will fit – like drawing a graphDraw the block to represent the plant first at the bottomDraw the other blocks in order of the food chainCheck it forms a pyramid shape
Energy and Biomass is lost at each stage
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