3.1 Coastal System Flashcards Preview

3. Coastal Systems and Landscapes > 3.1 Coastal System > Flashcards

Flashcards in 3.1 Coastal System Deck (11)
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1

List things that are in coastal systems?

inputs
outputs
flows
stores of sediment and energy

2

Input example

sediment can be brought into the system in various ways
energy inputs come from wind, waves, tides and currents

3

Output example

sediment can be washed out to sea or deposited further along the beach

4

Flows/transfers example

processes such as erosion, weathering, transportation and deposition can move sediment within the system

5

Stores example

landforms such as beaches, dunes and spits are stores of sediment

6

What type of equilibrium are coastal systems usually in?

dynamic
inputs and outputs are balanced

7

Explain negative feedback in a coastal system

when a change in the system causes other changes that have the opposite effect
beach is eroded, cliffs behind it are exposed to wave attack, sediment is eroded from the cliffs is deposited on the beach causing it to grow in size

8

Explain positive feedback in a coastal system

when a change in the system causes other changes that have a similar effect
a beach starts to form it slow down waves, which can cause more sediment to be deposited, increasing the size of the beach

9

How is energy transferred by air?

wind

10

How is energy transferred by water?

waves
tides
currents

11

Explain how wind transfers energy

winds are created by air moving from areas or high pressure to areas of low pressure, during events such as storm the pressure gradient is high and winds can be very strong
strong winds can generate powerful waves, in some areas wind consistently blows from the same direction - this causes higher-energy waves than winds that change direction frequently.