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Cards In This Set
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What is fetch?
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Fetch is wind dragging on the surface of the water. The length of water the wind blows over is called its fetch
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What is swash?
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Waves break in shallow water. The water that rushes up the sand is called the swash
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What is backwash?
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The water rolling back into the sea is called backwash
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What are tides?
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The result of the rise and fall in sea levels.
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Why do water levels change?
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Thats mainly because of the moon. As it travels around the earth, it attracts the sea and pulls it upwards.
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What are usually the characteristics of a low tide?
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A good amount of sand is visible, and marks of sand left when the tide was high. The water is lower
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What are usually the characteristics of a high tide?
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Almost no sand is visible. The water is higher
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What are the waves three jobs?
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They wear away, or erode the coast. They carry away or transport the eroded material. They drop or deposit it in sheltered areas where they lose energy.
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What are the four ways of which waves can erode rock?
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Hydraulic action, solution, abrasion, attrition.
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What are prevailing winds?
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Continuous winds.
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What are groynes?
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 Groynes are used to stop long shore drift. It stops the beaches being carried away from long shore drift. |
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What is long shore drift? Give an example.
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An example of long shore drift is a pebble on the beach. Back wash carries the pebble pack in to the water. The wave direction moves the pebble N E S W..then the pebble moves up again by the swash of the next wave. The process continues.
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How do groynes work?
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Groynes are barriers that stop long shore drift, so the beach stops being carried away. They are shaped like an airfoil.
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How is a beech formed?
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A beech is formed if it carrys more 'on' than 'off' . Waves will bring materials from the sea, and the swash will deposit it at the beach.
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How is a headland formed?
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Hard rock erodes more slowly than soft rock. So cliffs of hard rock jut out, forming a headland.
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