3.4 Energy in Ecosystems

Question 1

How is energy lost between levels in a food chain?

Answer 1

Heat
Undigested materials
Movement

Question 2

Why is 90% of energy lost between levels in a food chain?

Answer 2

Because only 10% of energy consumed is used for growth, and so only 10% is available for the predator to consume

Question 3

What does a pyramid of numbers show?

Answer 3

The number of organisms at each level of food chain

Question 4

What does a pyramid of energy show?

Answer 4

The total quantity of energy stored in the total biomass of all the organisms at each level in the good chain