5.3 Decay processes

Question 1

Why is it important that materials are recycled (in nature not by humans)

Answer 1

Otherwise all nutrients would be removed from the environment and would run out.

Question 2

Give an example of how humans can interfer with the process of returning neutrients to the soil

Answer 2

Removing dead trees from a forest means that the decaying wood does not return to the soil.

Question 3

What is the name of the type of animal that starts the process of decay by eating dead animals or plants?

Answer 3

A detritus feeder (eg worms )

Question 4

What types of microorganisms breakdown plant and animal material, what is the special name for the ones that do this?

Answer 4

Bacteria, they are called decomposers if they they play a part in helping materials decay

Question 5

Where do humans recycle their waste? 2

Answer 5

Sewage treatment plants and compost heaps

Question 6

Under what conditions is decomposition fastest?

Answer 6

If it is warm and wet. Some decomposers also need oxygen