WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Glaciated Landscapes
Tectonic Hazards
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
Coastal Landscapes
Coastal transport and longshore drift
- 2 things to know
- AS Unit 1
Overview
Four processes by which waves and currents transport sediment, transport in solution and transport in suspension.
What you need to know
Answer each one before you reveal it.
Name the four processes by which waves and currents transport sediment.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name the four processes by which waves and currents transport sediment.
Model answer
Solution, suspension, saltation and traction.
- 2
Explain transport in solution.
Model answer
Minerals dissolved from the rock, chiefly calcium carbonate, are carried invisibly within the water itself.
- 3
Explain transport in suspension.
Model answer
Fine particles of silt and clay are held up within the turbulent water and carried along without touching the bed.
- 4
Describe saltation as a transport process.
Model answer
Sand-sized grains are bounced along the sea bed in a series of short hops as turbulence lifts them and gravity returns them.
- 5
Describe traction.
Model answer
Traction is the rolling or dragging of the largest particles, such as pebbles and boulders, along the sea bed by the force of the water.
- 6
Which transport process moves the largest particles, and when does it operate?
Model answer
Traction, and it operates only when flow velocity is high, typically during storms.
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