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Coasts and erosion
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What is longshore drift
the movement of sediment along the coast
Explain what a coast is.
Where the land meets the sea
What are the two types of engineering for coastal defences?
hard and soft engineering
What is an advantage of a sea wall?
It is made of strong material e.g. concrete
What do coastal defences help to slow down?
Erosion of the coastline
How do groynes protect the coast?
they slow down the process of longshore drift
What is the backwash?
Part of the wave that retreats back down the beach.
What is the swash?
The part of the wave that approaches the shore.
Name a famous beach or coast.
Explain what happens during abrasion.
Rocks and sediment in wave grind against the cliff face.
Explain how a wave forms.
wind blows over the surface creating ripples. Ripples move up and down forming a cycle. When ripples approach the shore they break.
Explain what happens during solution.
Acidity of water naturally erodes weaker materials like limestone.
Explain what happens during attrition.
When rocks and sediment grinds against eachother and become smoother.
Explain what happens during hydraulic action.
waves blow wind into cracks of the cliff which expand.
How many types of waves are there? What are they both called?
2 types - constructive and destructive
What is the fetch?
The distance the wind blows over the surface of the ocean.
How many forms of coastal erosion are there?
4
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