Hertswood Academy Gcse Biology B1 5 Energy And Biomass In Food Chains

Front 1

Where does the energy for food chains come from? (1 mark)

Back 1

Sun

Front 2

How is light energy converted into chemical energy in plants? (1 mark)

Back 2

Photosynthesis

Front 3

What is biomass? (1 mark)

Back 3

The dry mass of living material in an organism

Front 4

Why does the amount of energy at each level of a food chain decrease? (5 marks)

Back 4

It is lost as heat in movement and respiration
It is lost in faeces and urine
Not all parts of the plant or animal are eaten
Not all of the organisms at each level are eaten

Front 5

Draw a pyramid of biomass for the food chain (3 marks - to scale)

Back 5

If graph paper is given draw to scale – if not don’t worry
Use numbers with Kg next to them
Decide on a scale that will fit – like drawing a graph
Draw the block to represent the plant first at the bottom
Draw the other blocks in order of the food chain
Check it forms a pyramid shape

Front 6

Why are pyramids of biomass pyramid shaped? (1 mark)

Back 6

Energy and Biomass is lost at each stage