Wave - The movement of the surface of the sea created by the wind dragging over its surface, Swash - The movement of the wave up the beach, Backwash - The movement of the wave down the beach, Constructive wave - Swash is greater than backwash and builds up the beach, Destructive wave - Swash is weaker than backwash so waves erode the beach, Erosion - The wearing away of the landscape by the movement of the waves over its surface, Attrition - Sediment carried in the waves is banged together, Hydraulic action - Water forces air into cracks in rocks which eventually weakens it , Abrasion - Waves fling sediment into rock faces and wears them away like sandpaper, Solution - Sea water dissolves soluble materials in the rock, Longshore drift - The transport of sediment along the coastline,

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