B1.5 Energy and biomass in food chains Flashcards
1
Q
What is the source of energy for most communities of living organisms?
A
The Sun
2
Q
What do green plants and algae do to energy? (3)
A
- ABSORB a small amount of the light
- PHOTOSYNTHESIS: Transfers light to chemical energy
- STORE the chemical energy
3
Q
Where do green plants and algae store chemical energy?
A
In the substances that make up the cells of the plants
4
Q
What is biomass?
A
The dry mass of: living material/an organism
5
Q
How are the amounts of material/energy contained in each stage reduced? (2)
A
Waste
Respiration
6
Q
Why does respiration reduced the amount of energy in the next stage of the food chain? (2 marks)
A
- Respiration supplies all energy for living processes inc. movement
- Most energy eventually–>surroundings.
