Feedback

Question 1

Define positive feedback

Answer 1

The change produces an effect which increases the original change

Question 2

Define negative feedback?

Answer 2

The change produced creates effects that aim to reduce or work against the initial change

Question 3

Provide an example of positive feedback

Answer 3

High velocity wind from intense storms causes lots of wind erosion which removes stabilising vegetation from the sand dunes. Consequently, more win erosion happens after the storm so the sand dune continues to decline

Question 4

Provide an example of negative feedback

Answer 4

When block fall mass movement takes place by erosion, the collapsed debris acts as a barrier and prevents any further erosion of the cliff