Key area 4- Energy in ecosystems

Question 1

How is energy lost in food chains?

Answer 1

Through heat, movement and undigested materials.

Question 2

How much energy is used for growth in organisms?

Answer 2

Only a small amount of energy is used for growth and is therefore available at the next level in a food chain.

Question 3

What does a pyramid of numbers show?

Answer 3

It shows the number of organisms at each level of a food chain.

Question 4

What does a pyramid of energy show?

Answer 4

It shows the total quantity of energy stored in the biomass of organisms at each level of a food chain.