B4.1.8

Question 1

What are decomposers

Answer 1

Microorganisms. These bacteria and microscopic fungi break down, or decay dead organic matter.

Question 2

What can decomposers also break down

Answer 2

They can also break down animal waste such as faeces and urine

Question 3

What do decomposers release

Answer 3

Nutrients which can be cycled

Question 4

What are dertritivores

Answer 4

Small animals that speed up decomposition by shredding organic matter into small pieces.

Question 5

How do bacteria and fungi break down substances

Answer 5

Bacteria and fungi break down substances into organic matter. Soluble nutrients are reabsorbed into their bodies and are used for growth and an energy store.

Question 6

How do warm temperatures affect the rate of decomposition

Answer 6

At high temperatures enzymes are denatured and at low temperatures the rate of decomposition is slow as the enzyme controlled reactions are reduced.

Question 7

How do moist environments affect the rate of decomposition

Answer 7

If no enough water is available reactions within the microorganisms will slow down or be prevented reducing stopping or slowing down of rate of reaction.

Question 8

How do aerobic conditions affect rate of decomposition

Answer 8

oxygen is needed for organisms to respire. Anaerobic conditions prevent most forms of decomposition and microorganisms can’t survive.