Coasts

Question 1

Open system (e.g. coast)

Answer 1

Receives inputs from outside the system and transfers outputs away from the coast and into other systems
Systems may be terrestrial, atmospheric or oceanic, and can include rock, water and carbon cycles

Question 2

Positive feedback

Answer 2

-Where a flow/transfer leads to increase or growth
-e.g. coastal management diverting energy further along coastline, can exacerbate erosion

Question 3

Negative feedback

Answer 3

-Where a flow/transfer leads to decrease or decline
-e.g. When the rate of weathering and mass movement exceeds rate of cliff foot erosion, protects cliff due to slumped material, reduces effectiveness of erosion