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L1erosion

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L1erosion

  1. 1. Coastal ErosionCoastal Erosion Causes of erosion, coastalCauses of erosion, coastal landformslandforms
  2. 2. Exam Q • Name and describe two processes of erosion which affect cliffs. • 1.................................................................................................. .................................................................................................... .................................................................................................... • 2.................................................................................................. .................................................................................................... .................................................................................................... [4marks] – 1 mark per named process, 1 per explanation
  3. 3. Coastal erosion: recap • There are 4 different types of coastal erosion. • • Abrasion (aka Corrasion) • Hydraulic action • Corrosion (aka Solution) • Attrition • What’s the difference?
  4. 4. Types of coastal erosion
  5. 5. The secret art of Coastal Kung Fu Fighting! Hydraulic Action: make punching movements with hand - demonstrates force of water hitting cliff. Abrasion: make a throwing gesture with hands like you are throwing dealing cards very rapidly Attrition: make 2 fists, and then bring them towards each other, hitting each other, then open hand to resemble a stone breaking. Corrosion: have arms out stretched in front of you, waving fingers, and moving arms downwards. Make a sound of something dissolving.
  6. 6. Coastal landforms • Coastlines are constantly changing shape because of erosion and deposition. • They are dynamic and unsteady • The sea is the biggest cause of change, it both erodes and deposits material The amount of coastal change depends on: 1) the types of waves affecting the coast 2) the geology (rock type) of the coastline
  7. 7. The geology of the coast affects how much it is eroded. More resistant rocks (e.g. chalk) erode more slowly than less resistant rocks (e.g. clay, limestone) This forms headlands / cliffs and bays/ beaches
  8. 8. Answer these exam questions in your books using full sentences. 1) Describe the image (3 marks) 2) How was this formed? (2marks) 3) What might the impact be on people? (2marks)
  9. 9. Homework • Find an example of a coastline that is being eroded. • Need to include: » Name of coast » What is happening to it (e.g. forming a beach, cliff collapsing, etc.) » How does it effect people here? • Due:
  10. 10. Homework • Find an example of a coastline that is being eroded. • Need to include: » Name of coast » What is happening to it (e.g. forming a beach, cliff collapsing, etc.) » How does it effect people here? • Due:

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