B1.5 Energy and biomas

Question 1

What is trophic level 1?

Answer 1

The top carnivore

Owl

Question 2

What is trophic level 2?

Answer 2

Omnivore/secondary consumer

Mouse

Question 3

What is trophic level 3?

Answer 3

Herbivore/primary consumer

Bug

Question 4

What s trophic level 4?

Answer 4

Producer

Grass

Question 5

What is a detrital food chain?

Answer 5

A chain that starts with dead materials or waste

Question 6

What are detrivores?

Answer 6

Organisms that eat dead material (dead leaves)

Question 7

What do decomposers do?

Answer 7

Decay the bodies of other organisms but don’t eat them

Question 8

What is biomass?

Answer 8

The dry weight of something (drain all the water out)

Question 9

What does a biomass pyramid do?

Answer 9

Takes the traditional shape of a pyramid

     Lady birds    ..........aphids.......... ............Leaves............

Question 10

What happens to the energy as it passes to the next consumer?

Answer 10

More is taken up by the consumer before so less is available to the next consumer

Question 11

What is energy lost in? (3)

Answer 11

• Heat (respiration)
• Excreted (sweating and urine)
• Egestion (faeces)

Question 12

What do decomposers gain energy from?

Answer 12

Waste

Question 13

How do farmers reduce energy loss? (3)

Answer 13

• Keeping animals inside (less heat loss)
• Use pesticides (pests don’t get all the energy from crops)
• Keeping animals close together (reduces heat loss)