ENERGY IN ECOSYSTEMS Flashcards
1
Q
how much energy is lost from a food chain or web?
A
90%
2
Q
how much energy in a food chain or web is used for growth?
A
10%
3
Q
what is energy used for?
A
- movement
- chemical reactions
- maintenance of body temperature
- growth and repair of tissue
4
Q
what is a food chain?
A
a diagram that shows the feeding relationships between different living things in a particular environment
5
Q
how is energy lost in a food chain or web?
A
- some energy is converted to heat
- some energy is used for movement
- some energy remains in undigested material e.g bones
6
Q
what is a food web?
A
a number of food chains joined together
7
Q
what is a pyramid of numbers?
A
a diagram which shows the relative total number of organisms present at each stage in the food chain
8
Q
what is a pyramid of energy?
A
a diagram which shows the total energy of organisms present at each stage in the food chain
9
Q
what type of competition is more intense?
A
intraspecific competition
