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There are three main processes of coastal erosion. Hydraulic action is the power of the waves crashing into the cliffs. This forces air between cracks in the rock, breaking it apart. Corrosion/solution is the process of chemicals in sea water, such as salt, dissolving minerals in the rock. Corrasion/abrasion is the weakening of the rock by sand, shingle and other particles carried in the sea.
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First broadcast:
17 October 2007

Classroom Ideas

Students could be given a partly finished two column table with either the names of the processes or their descriptions completed, they could finish the table by adding the missing name or description. An extension of this could be to create an annotated diagram from their notes to explain how each process operates.

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