1. Energy transfer and decay

2. Key terms
Food chains
Biomass
Consumer
Producer
Primary
Secondary
Tertiary
Decay
Decomposers
Moisture
Compost

3. Food chains show who eats who!
Pyramids of biomass show the mass of the organisms at each stage of the
food chain.
ABCD
Which letter(s) represent the consumer(s)?
Which letter(s) represent the producer(s)?
The pyramid of biomass will always be a pyramid.
There will always be energy wastage between each stage in the
process.
Where does the energy go?

4. Energy is lost to the environment in:
Respiration  energy for living eg movement
Heat – keeping warm
Waste materials – faeces and urine

5. Decay – part of the cycle of life
Organisms take energy from the environment
They also give energy to the environment when they die
Microorganisms (eg bacteria and fungus) help the decay process. These
organisms are called decomposters.
Three things will help to speed up the decay process

6. Three conditions speed up the decay process:
Warmth
Moisture
Oxygen

8. a

9. a

10. How are these foods
preserved?

11. Peat bog man – why so preserved?

12. Key terms
Food chains
Biomass
Consumer
Producer
Primary
Secondary
Tertiary
Decay
Decomposers
Moisture
Compost