The sea: how it shapes our coast
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How are waves formed? | Formed when wind moves across the surface of the sea
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| What is a fetch? | The distance of open sea over which wind blows
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| What is swash? | The water that rushes up a beach when a wave breaks
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| What is backwash? | The water that returns back down the beach
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| What is a constructive wave? | When the swash is greater than the backwash and material is deposited on the beach
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| What is a destructive wave? | When the backwash is greater than the swash and material is eroded and carried away
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| What is hydraulic action? | Physical force of the waves breaking material off the coastline
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| What is abrasion? | Any loose material (rocks and sand) is thrown by the waves against the coast and breaks off material
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| What is compressed air? | When waves crash against a cliff, air gets trapped in the cracks and becomes compressed. When the waves retreat, the pressure is suddenly released and shatters the rock
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| What is solution? | Some rocks are dissolved by water
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| What is attrition? | Stones that are carried in the water constantly hitting off each other. Over time, they become worn down, smooth and rounded. This eventually forms sand.
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| What is a bay? | A curved area where waves have eroded the coastline
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| What is a headland? | An area of hard rock jutting out into the sea
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| Give an example of a bay and a headland | Dublin Bay and Bray Head
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Created by:
stellamcb
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