| Question | Answer |
| ABRASION | waves transport material which hit the cliff and gradually wear it away. |
| HYDRAULIC ACTION | as waves approach the coast they trap air and force it into gaps in the cliff. Eventually this weakens the rock. |
| ATTRITION | waves cause the rocks to crash against each other, breaking them down into smaller and rounder pieces. |
| SOLUTION | salts and acids in seawater dissolve the rock gradually over thousands of years. |
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