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Coasts and erosion

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