Lesson 3 worksheet

2. What factors affect rate of coastal erosion? Beaches Absorb wave energy which slows down erosion by protecting cliffs Rock structure Cliffs with weaknesses (joints) and cracks are more easily eroded Rock type Resistant rocks eg. granite erode very slowly. Less resistant eg. clay erode quickly Wave energy Erosion greatest when waves and big and frequent Weathering Sub-aerial attack on cliffs speed up erosion (wind & rain) and don’t forget …… PEOPLE

3. Headlands and Bays They form along coasts that have alternating bands of hard and soft rock Lulworth Cove Click on picture above for a short video on how bays are formed 2.03

4. Cliff Erosion Click diagram above for a short video about cliff collapse in Beachy Head 1.45

6. Wave Cut Platforms The sea cliff is the most widespread landform of coastal erosion.

7. Caves, Arches and Stacks

8. Arch

9. Stacks

10. Caves, Arches and Stacks Waves erode weaknesses in the rock. Cave eroded into cliff at line of weakness Size of cave is increased by erosion until headland is opened out at both sides Wave erosion causes roof of cave to collapse leaving the stack

11. Transport and Deposition Longshore Drift Click on diagram to start short video on longshore drift 2.06

12. Longshore Drift in action