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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the main agent of change in a coast? |
Sea, due to its waves |
It has a High and a Low tide |
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What other agents act on the coasts? |
Earthquakes Tsunamis Weathering |
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Breaking waves rush up the beach, what is this called? |
Swash |
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The water from the wave is drawn back into the sea, what is this called? |
Backswash |
It is very similar to the opposite |
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How is a wave created? |
Wind blowing across the sea's surface causing water to create a circular motion within itself. |
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What is the name of the area over which the wind blows? |
Fetch |
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What are the causes that control how strong a wave is? |
Fetch
Time Length |
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What are the two different types of waves? |
Constructive Destructive |
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When is a wave destructive? |
When it has a weak swash but a strong backwash |
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When is a wave constructive? |
When it has a strong swash but a weak backwash |
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What are the 4 processes of erosion in beaches? |
Attrition Abrasion Hydraulic action Solution |
Are the same in a river (remember Rory rolling on the floor) |
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What does the rate of coastal erosion depend on? |
-Geology of the area (Soft or Hard rock) -Type of wave (constructive or destructive) -Coast line shape (Bays are protected but headlands suffer full force) -Length of the beach (wider beach protects coast) |
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what is the sequence of coastal features? |
Fault Crack Sea cave Arch Stack Stump |
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What is the name of the process through which sediment is carried along a beach? |
LSD(Longshore drift) |
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In which direction does LSD occur? |
Direction of prevailing wing |
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What is a way of reducing LSD? |
Groynes (long wooden fences |
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What creates sand dunes? |
Wind |
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How are sand dunes created? |
Wind blowing inland carry sediment, when wind speed drops the sediment is dropped, creating dunes |
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How can a dune be stopped? |
Special vegetation like marram grass prevent too much sediment from moving out of the dune |
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What is a spit? |
a long and narrow ridge of sand going across a bay or a river estuary
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What is called a spit that closes off a bay? |
A bar |
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What is called the new closed off water inland from the bar? |
Lagoon |
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If the spit is across a river mouth, what is created inland from it? |
Salt marsh eventually colonised by halophytes forming network of tidal creek |
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What are tombolos? |
A low-lying ridge that connects an island to the mainland but is submerged during a high tide |
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I don't have a case study... |
help |
pls help |
