Flashcards in 3.1 Coastal System Deck (11)
List things that are in coastal systems?
stores of sediment and energy
sediment can be brought into the system in various ways
energy inputs come from wind, waves, tides and currents
sediment can be washed out to sea or deposited further along the beach
processes such as erosion, weathering, transportation and deposition can move sediment within the system
landforms such as beaches, dunes and spits are stores of sediment
What type of equilibrium are coastal systems usually in?
inputs and outputs are balanced
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
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
How is energy transferred by air?
How is energy transferred by water?