3.4 Energy in ecosystems Flashcards
1
Q
How is energy passed in a food chain
A
From one organism to the next
2
Q
How is energy lost
A
1) Heat
2) Movement
3) Undigested material
3
Q
Why is there energy available for the next level in a food chain
A
Only a small quantity of the energy taken in is used. The energy is then used for growth once transferred
4
Q
What is a pyramid of numbers
A
They show the total number of organisms at each level at a food chain
They don’t always have a regular pyramid shape
5
Q
What is a pyramid of energy
A
It shows the energy available at each level of a food chain.
It walk always have a regular pyramid shape, largest at the bottom and smallest at the top.
This is because energy is lost between each stage
