Coastal Deposition
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10 questions
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- Q1Depostion occurs when waves lose energy and deposit their load. Which of the following is <B>not</B> another reason that deposition is likely to occur?There is a large amount of material to be depositedThere is little or no windWaves enter a large open area, such as moving from a bay to the open seaWaves enter an area of shallow water30s
- Q2Backwash is when a wave washes back down the beach. What do we call the opposite, when the wave washes up the beach?ConstructiveSwashLongshore driftDeposition30s
- Q3What is longshore drift?The process where a reef is eroded on the upstream side and deposited on the downstream side, gradually moving it along the coastWhen a boat or other object comes to rest on a sandy shore material builds up downstream of the hull, and is eroded from upstreamThe process that forms a high-tide line on a beach of flotsam and jetsam, as material is deposited by the movement of waves in and outThe transportation of sediments (clay, silt, sand and shingle) along a coast at an angle to the shoreline, in a zig-zag pattern30s
- Q4Which of the following is <B>not</B> a method of coastal transportation?SuspensionSolutionTractionErosion30s
- Q5In terms of backwash and swash, when is deposition most likely to occur?When backwash is stronger than swash deposition is more likely to occurWhen swash is stronger than backwash deposition is more likely to occurDeposition occurs in neither swash nor backwashWhen backwash is equal to swash deposition is more likely to occur30s
- Q6Constructive waves are most likely to occur on which sort of beach?A beach that is heavily used for tourismA beach with sheer cliffs and a strong wave actionA flat or shallow beachA steep beach30s
- Q7Some beaches are protected by an offshore landform known as a reef. Which of the following is <B>not</B> a way reefs may form?Coral based creatures grow at the point of optimal light growthCliffs erode unevenly and leave behind land after arches collapseSand banks build up as material is deposited away from the beachBeach protection measures are artifically constructed to protect the land or provide leisure opportunities30s
- Q8What sort of shape should a constructive wave have?A high wave in proportion to its length with a tall breakerA long wavelength and a steep breakerA low wave height and a long wavelengthA steep crest with a short wavelength30s
- Q9Spurn Head is a famous coastal spit across the mouth of the River Humber. The material that has built up the spit is the result of longshore drift. Why has this spit formed at this location?The pollution coming down the river is deposited at this point. This allows the material moving down the coast to build up hereThere is a natural reef at this point that material builds up on, aided by longshore driftThe energy in the waves and the river is reduced at this location causing the material to be depositedThe change in currents as the river enters the sea causes more energy to enter the system30s
- Q10What is a tombolo?A type of lagoonA beach with a lake behind itA type of headland that terminates at a different type of rockA spit connecting an island to the mainland30s