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23 Cards in this Set
- Front
- Back
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What physical processes are at work on the coast? |
Marine processes, processes of weathering, mass movement |
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What is erosion? |
The process of eroding or being eroded by wind, water, or other natural agents. |
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What is deposition? |
When material is left after being carried by the waves and water |
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What is the coast? |
The transition zone between the sea and the land. The coast line is the actual frontier between the two. |
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What is transportation? |
The movement of material by water |
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What is long shore 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 mechanical weathering? |
The process through which large rocks are broken into increasingly smaller pieces. |
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What is chemical weathering? |
The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes. |
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What is biological weathering? |
Biological weathering is the weakening and subsequent disintegration of rock by plants, animals and microbes. Growing plant roots can exert stress or pressure on rock. ... Microbial activity breaks down rock minerals by altering the rock's chemical composition, thus making it more susceptible to weathering. |
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What impact does geology have on the coast? |
The different strengths of rocks means that the coast line erodes at different rates. |
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What different landforms can be produced due to the different rocks? |
Headlands and bays |
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What impact does vegetation have on the coast? |
It helps hold some of the rocks hold together and make the erosion rate different along the coastline. |
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What impact can people have on the coast? |
People may use vehicles that may damage part of the coast which may cause the rocks to be eroded faster |
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What are the key erosional processes? |
Hydraulic action, abrasion, corrosion , attrition |
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How are spits formed? |
A spit is an extended stretch of beach material that projects out to sea and is joined to the mainland at one end. Spits are formed where the prevailing wind blows at an angle to the coastline, resulting in longshore drift. |
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How are bars formed? |
A bar is created when there is a gap in the coastland with water in it. ... The deposited material eventually joins up with the other side of the bay and a strip of deposited material blocks off the water in the bay. The area behind the newly formed bar is known as a lagoon. |
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How do storm surges cause coastal flooding? |
Storm surges are sudden rises in sea level caused by very strong winds, normally those found in hurricanes and cyclones. The strong winds essentially push the water on an ocean's surface on top of more water, increasing the sea level and flooding coastlines. |
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How do tsunamis cause flooding? |
Coastal areas can be significantly flooded as the result of tsunami waves which propagate through the ocean as the result of the displacement of a significant body of water through earthquakes, landslides, volcanic eruptions and glacier calvings. |
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How does climate change cause flooding? |
Climate change causes heat changes. This melts glaciers and ice caps which causes the sea levels to rise. |
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How can forecasting prevent flooding? |
Forecasting allows the affected areas to prepare for the flood. |
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What are the advantages of beach replenishment? |
It is very effective and doesn't have to be done alot. |
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What are the disadvantages of beach replenishment? |
It can be very expensive |
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How are tropical storms formed? |
Warm moist air moves over the ocean, water vapour rises. As the water vapour rises it cools and condenses into water droplets. Condensation releases heat into the atmosphere making the air lighter. The warned air continues to rise with moist air from the ocean. Taking its place creating more wind. |
