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Geography(The Sea)

What are waves responsible for? Erosion, transportation and deposition of material along our coasts
How can waves occur? When wind moves across the surface of the sea
What is swash? The forward movement a of a wave breaking onto the shore
What is a backwash? The backward movement of a wave breaking onto the shore
What are constructive waves? Waves that deposit more than they erode
What are destructive waves? Waves that erode more than they deposit
Name the features of coastal erosion Hydraulic action, compressed air,abrasion or corrosion,attrition and solution
What is hydraulic action? The force of water bashing against the coastline
What is compressed air? When air gets trapped in cracks or fissures in rocks
Abrasion or corrosion? When rocks,pebbles and stones are hurled against the coastline
Attrition? When rocks are in collision with each other
Solution? When rocks are dissolved by acids in the water e.g Limestone
Name and explain a feature of coastal erosion Bay and headland. Bays and headlands are formed as a result of compression and abrasion. Coastlines consist of areas of hard rock and soft rock. When waves hit against the rock the soft rock(bay) is eroded more quickly than the hard rock(headland)
Example of bay Dublin bay
Example of headland Dunmore Head, co. Kerry
Name and explain a feature of coastal deposition Beach. An area between the high tide and low tide mark. When waves break they are unable to carry material further and so deposit it. The swash is usually powerful and deposits larger materials up the beach. The backwash is less powerfull
Give an example of a beach Tramore, Co.Waterford
Give two examples of human activity on the sea Pollution, oil spillages and food,water
Created by: Chimozukee