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A LITTLE BIT
ABOUT HOW COASTLINES ARE FORMED
We'll learn a bit about the formation of coastlines in this activity:
Make a model beach of sand or soil at one end of a large, rectangular pan or tray with sides of two inches or so. Be sure the edge of the beach is parallel to the end of the pan. Fill the pan about half full of water.
Produce a wave by lifting the near end of the pan about one inch above the table top and returning it quickly to its original position. Repeat this every five seconds for two minutes.
Observe and discuss what gradually happens to the model beach. Repeat the activity after rebuilding the beach so that its edge is at an angle of 30 degrees to the end of the pan. You could even place a few small rocks on the beach.
Discuss the differences in the results.
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