feedback and wave types

Question 1

give an example of negative feedback starting w destructive waves from storm lose energy

Answer 1

> sediment deposited as offshore bar > bar dissipates waves energy which protects beach from further erosion > bar gets eroded over time instead of beach > bar gets fully eroded leaving system in dynamic equilibrium

Question 2

give an example of positive feedback starting with people walking over sand dunes

Answer 2

> destroys vegetation and erodes sand dune > roots holding dune together get destroyed > sand dunes get completely eroded > beach open to erosion > taking beach further away from its original state

Question 3

why is cliff erosion mostly in winter

Answer 3

more frequent storms

Question 4

define the sediment budget

Answer 4

balance of inputs + outputs within a sediment cell

Question 5

define the littoral zone

Answer 5

area of land between cliffs/dunes on the coast and the offshore area that’s beyond the influence of the waves

Question 6

define the shore/shoreline

Answer 6

boundary between sea and land

Question 7

define the offshore area

Answer 7

area beyond influence of the waves

Question 8

define onshore area

Answer 8

area of land not covered by the sea

Question 9

what does stronger winds lead to

Answer 9

stronger waves

Question 10

what effect of wind being active for longer periods of time uninterrupted lead to

Answer 10

longer fetch, stronger waves

Question 11

define the fetch

Answer 11

the distance over which wind blows uninterrupted

Question 12

what does the length of the fetch effect

Answer 12

how powerful the waves will be