3.4 Energy In Ecosystems

Question 1

What is energy lost between levels of a food chain lost as?

Answer 1

• heat
• movement
• undigested material

Question 2

What do the arrows in a food chain represent?

Answer 2

Transfer of energy between organisms

Question 3

How much of the energy passed on is used?
What happens to the rest of the energy?

Answer 3

Only around 10% of the energy is used for growth
Most of the energy will not be passed on to the next level of the food chain

Question 4

What does a pyramid of numbers show?

Answer 4

Shows the population of each species at each level

Question 5

What is the bottom layer of the pyramid of numbers?

Answer 5

Always a producer

Question 6

What shape is the pyramid of numbers if a tree is the producer or there are parasites?

Answer 6

Can be an irregular shape

Question 7

What does a pyramid of energy show?

Answer 7

Shows how much energy there is at each level in Joules ( J )

Question 8

What shape will a pyramid of energy always be?

Answer 8

Always be a true pyramid shape