Coastal Processes

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What is a destructive wave?
Destructive waves are created in storm conditions. They are created from big, strong waves when the wind is powerful and has been blowing for a long time.
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What type of conditions do you need for destructive waves?
They occur when wave energy is high and the wave has travelled over a long fetch. They tend to erode the coast
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What has a stronger backwash than swash?
Destructive Waves
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What is the backwash?
The flow back to the sea after the wave have broken
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What is the swash?
When a wave breaks, water is washed up the beach.
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What is the fetch?
how far the wind has travelled
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What is 1 difference between constructive/destructive waves?
Constructive waves have a strong swash and a weak backwash. Destructive waves have a weak swash but a strong backwash.
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What is a 2nd difference between constructive/destructive waves?
Constructive waves create a wide and flat beach but destructive waves create a short/steep beach.
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What is weathering?
wear away or change the appearance or texture of (something) by long exposure to the atmosphere.
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What is coastal erosion?
wearing away and breaking up of rock along the coast
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What is hydraulic action?
Air may become trapped in joints and cracks on a cliff face. When a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion.
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What is abrasion?
Bits of rock and sand in waves grind down cliff surfaces like sandpaper.
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What is attrition?
Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.
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What is solution?
Acids contained in sea water will dissolve some types of rock such as chalk or limestone
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What is longshore drift?
the movement of material along a coast by waves which approach at an angle to the shore but recede directly away from it.
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What is deposition?
sediments, soil and rocks are added to a landform or land mass.
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What is a spit?
extended stretch of beach material that projects out to sea and is joined to the mainland at one end.
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What is a bar?
very similar to a spit. It is a ridge of sand or shingle which forms across the mouth of a river, the entrance to a bay or harbour. It is usually parallel to the coast.
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What is our example of a soft rock coastline?
Happisburgh (North Norfolk)
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What is our example of a hard rock coastline?
Dorset Coastlin
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Other cards in this set

Card 2

Front

What type of conditions do you need for destructive waves?

Back

They occur when wave energy is high and the wave has travelled over a long fetch. They tend to erode the coast

Card 3

Front

What has a stronger backwash than swash?

Back

Preview of the front of card 3

Card 4

Front

What is the backwash?

Back

Preview of the front of card 4

Card 5

Front

What is the swash?

Back

Preview of the front of card 5
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