A beach is a small stretch of the earth that has a gentle slope that runs along a body of water. Sand, pebbles, seashells and other materials constitute beaches.
Weathering and erosion cause the wearing down of rocks and other materials by water and wind over a long time. For example, stones may fall free from the constant force of waves crashing against a rocky ledge. Constant erosion causes rocks and boulders to form tiny grains of sand.
Substances on the beach may be transported far away by waves and winds. Sand, shells, rocks and marine life are affected as they are carried away by the receding tide.
This sediment can travel by tides and ocean currents from one location to another. It is responsible for the creation, modification, and even destruction of beaches.
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