Key Area 3.4 - Energy In Ecoystems Flashcards
1
Q
Describe a pyramid of numbers
A
A diagram that represents the total numbers of organisms at each stage of a food chain
2
Q
What does the length of each bar in a pyramid of numbers represent?
A
The number of organisms at each feeding level
3
Q
Why may a pyramid of numbers may be an irregular shape?
A
Because the producer may be one large tree, supporting many organisms
4
Q
Give an example of a pyramid of numbers
A
1 tiger
10 birds
100 worms
Oak tree
(producer)
5
Q
Describe a pyramid of energy
A
A diagram that shows the total energy every in the bodies of all organisms at each level of a food chain
6
Q
What does the length of each bar in a pyramid of energy represent?
A
The volume of energy available - at each feeding level
7
Q
Why will a pyramid of energy always be a regular pyramid shape?
A
As energy is always lost at each level
