Sediment and Transportation Flashcards Preview

A2 Geography- Coasts > Sediment and Transportation > Flashcards

Flashcards in Sediment and Transportation Deck (14)
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1
Q

what are the four sources of shingle?

A
  • Rivers: Fine grains, Silts and sands
  • Cliffs: usually course sand and shingle is produced
  • The sea: The tides move the sediment
  • Glaciers and ice sheets
2
Q

which type of wave pushes material up the beach?

A

constructive

3
Q

which type of wave removes material from the beach?

A

destructive

4
Q

what is traction?

A

when the largest cobbles and pebbles are rolled along the sea bed. A lack of energy from the waves mean that they cannot be picked up.

5
Q

what is is saltation?

A

when smaller pebbles bounce along te sea bed. this is due to the changes in wave energy and the pebbles bouncing into other pebbles

6
Q

what is suspension?

A

fine sands are held in the body of water and move with the current

7
Q

what is solution

A

Microscopic material- dissolved in the sea water and is carried within the moving currents

8
Q

what are the four processes in a sediment cell?

A

inputs, outputs, deposition and transportation

9
Q

what are sediment cells separated by?

A

protruding land

10
Q

what is sediment source?

A

material is collected on the coast from different places-rivers, sea beds, eroded coasts

11
Q

what is a sediment cell?

A

distinct areas of coast, separated by deep water or headlands within which material is moved but contained within that cell

12
Q

what is a sediment sink?

A

areas where sediment is deposited

13
Q

when does the material sink?

A

when the energy of the water decreases eg. wave refraction because bays have calmer water

14
Q

how many sediment cells are there around england and wales?

A

11