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Factors Affecting Coastal Erosion Quiz
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Factors Affecting Coastal Erosion Quiz

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Questions and Answers

What effect does a large amount of sediment on the beach have on the power of the waves?

  • Reduces the power of the waves (correct)
  • Increases the power of the waves
  • Generates more erosive waves
  • Has no impact on the power of the waves

    • Which coastal erosion type involves waves breaking against rocks and weakening their structure?

  • Wave pounding (correct)
  • Corrosion/Solution
  • Hydraulic pressure
  • Attrition

    • What is the primary mechanism behind the erosion caused by abrasion/corrasion?

  • Chemical reactions between air and seawater
  • Wearing away rock surfaces by wave action
  • Transportation of small rock particles by waves
  • Throwing sand and rocks against rocky coastlines (correct)

    • How does hydraulic pressure contribute to weakening rock faces?

    <p>By compressing air in rock cracks under wave pressure</p> Signup and view all the answers

    What happens when a large piece of rock falls away due to attrition?

    <p>Rocks gradually wear down into smaller particles and sand</p> Signup and view all the answers

    How does the width of a beach impact the energy of waves reaching the back of the beach?

    <p>Reduces wave energy surging up the beach</p> Signup and view all the answers

    What is a factor that affects the rate of erosion along a coastline?

    <p>Depth of sea</p> Signup and view all the answers

    What role do ocean currents play in regulating temperatures?

    <p>Creating milder climates</p> Signup and view all the answers

    Which coastal current is responsible for the movement and deposition of sediment along the eastern coast of Australia?

    <p>Longshore drift</p> Signup and view all the answers

    Which type of waves have more energy according to the text?

    <p>Steep, destructive waves</p> Signup and view all the answers

    How does longshore drift differ from deep ocean currents?

    <p>Longshore drift carries sediments parallel to the coast, while deep ocean currents circulate globally.</p> Signup and view all the answers

    What are the two main types of erosion mentioned in the text?

    <p>Water and wind erosion</p> Signup and view all the answers

    Why do beaches form only where there is a good supply of sand and some form of protection?

    <p>To prevent sand erosion</p> Signup and view all the answers

    What is the main function of longshore drift along coastlines?

    <p>Movement and deposition of sediment</p> Signup and view all the answers

    Why does a wave release more energy when it breaks at the cliff?

    <p>It concentrates wave energy onto the cliff</p> Signup and view all the answers

    Which process is responsible for carrying sediments eroded by destructive waves from beaches?

    <p>Longshore drift</p> Signup and view all the answers

    What landform features are associated with the process of deposition?

    <p>Sandbars, spits, and barrier islands</p> Signup and view all the answers

    How does the fetch affect wave energy?

    <p>The longer the fetch, the more time for waves to collect energy from the wind</p> Signup and view all the answers

    What causes tides at the coastline according to the text?

    <p>Gravitational pull of the moon on the oceans</p> Signup and view all the answers

    Which factor affects the rate of erosion by determining the strength of the rock?

    <p>Rock hardness</p> Signup and view all the answers

    How does salt-spray weathering break up the surface of rocks?

    <p>By expanding and contracting salt particles under sunlight</p> Signup and view all the answers

    Which agent of erosion occurs when sea creatures attach to rocks and produce chemicals that break down minerals?

    <p>Animal weathering</p> Signup and view all the answers

    What type of rock is mentioned as being easy to erode due to its softness?

    <p>Sandstone</p> Signup and view all the answers

    Which process involves transporting material that has been worn away from one place to another?

    <p>Erosion</p> Signup and view all the answers

    What is the main cause of the daily and monthly pattern of tides?

    <p>Gravitational pull by the moon and the sun</p> Signup and view all the answers

    Which coastal process is described as the movement of particles along the beach due to wave action?

    <p>Longshore drift</p> Signup and view all the answers

    Which source specifically explains the process of longshore drift?

    <p>Source 7.1.6</p> Signup and view all the answers

    What is the direction of the retracted wave in relation to longshore drift?

    <p>Opposite to longshore drift</p> Signup and view all the answers

    What natural phenomenon causes changes to the coast through erosion and deposition?

    <p>Natural processes</p> Signup and view all the answers

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