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Coastal Erosion

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  • Which of these is NOT caused by coastal erosion?
    Habitat destruction
    Loss of beaches
    Underground oil formation
  • Storm surges associated with severe weather can dramatically accelerate coastal erosion.
    True
    False
    A storm surge always builds up beaches
  • Abrasion in coastal erosion refers to rocks and sediment being hurled against cliffs by waves.
    It refers to wind blowing inland
    False
    True
  • Which natural force compresses air into cracks in coastal rock and helps break it apart?
    Hydraulic action
    Glacial carving
    Magnetism
  • Which of these human actions can worsen coastal erosion?
    Building coral reefs
    Sand mining from beaches
    Planting mangroves
  • Coastal erosion is the wearing away of land along the coastline by waves, currents, tides, and wind.
    The wearing away of land by the sea
    The building up of land from deposited sediment
    The sinking of land due to earthquakes
  • What term describes sand and soil being carried along the shore by current and wave action?
    Longshore drift
    Plate tectonics
    Earthquake uplift
  • Which feature is formed by continued coastal erosion?
    Sea arches and stacks
    Volcano craters
    River deltas
  • Which of the following is NOT a cause of coastal erosion?
    Strong wind
    Tree planting on dunes
    Storm surge
  • Waves, currents, and wind reshape shorelines by removing and depositing sediment over time.
    True
    They only affect underwater landscapes
    False
  • Human activities like coastal development can increase erosion by disrupting sediment flow.
    True
    False
    It prevents all erosion entirely
  • What is the loss of land along the coast called?
    Coastal erosion
    Ocean expansion
    Volcanic intrusion
  • Ocean currents play a role in moving sediment along the coast over time.
    True
    False
    Currents only move water, not sediment
  • What kind of wave action can most rapidly erode a cliff face?
    Constructive waves
    Silent waves
    Destructive waves
  • Deposition is the opposite of coastal erosion and involves materials being dropped along the shore.
    True
    It means the sea level rises permanently
    False
  • What natural feature can help slow coastal erosion?
    Plastic barriers
    Concrete jets
    Vegetation like mangroves
  • Which of these is a natural process that changes the coastline over time?
    Car engine exhaust
    Asteroid impacts
    Hydraulic action
  • Sea level rise causes coastal erosion because it increases wave impact on the shore.
    False
    It decreases wave energy
    True
  • A coastline can slowly retreat over years due to the net removal of sediment.
    True
    It becomes permanently fixed
    False
  • Which of the following primarily contributes to coastal erosion?
    Forest growth
    Mountain formation
    Wave action
  • Erosion does not always mean permanent land loss
    True
    Erosion always destroys everything
    False
    sometimes material is deposited elsewhere.
  • Which of these is an example of coastal protection?
    Beach nourishment
    River mining
    Deforestation
  • What happens to sediments removed from one part of a shoreline?
    They may be transported and deposited elsewhere
    They transform into magma
    They vanish
  • What term describes the movement of sediment parallel to the shoreline?
    Tidal shuffle
    Friction decay
    Longshore drift
  • Waves that deposit more sand than they remove are called what?
    Constructive waves
    Explosive waves
    Destructive waves
  • _______ can accelerate erosion by increasing wave energy and flooding low coastal areas.
    Cloud formation
    Climate change
    Soil harvesting
  • When heavy rainfall increases surface water flow toward the sea, it can contribute to erosion.
    Rainfall has no effect
    False
    True
  • Climate change is expected to increase coastal erosion through higher sea levels.
    False
    True
    It decreases sea levels
  • Buildings and roads near the shoreline are at risk because erosion removes supporting land.
    False
    It makes the land more stable
    True
  • Why does coastal erosion occur?
    Because the sun melts ice
    Because waves and currents remove shoreline material
    Because mountains rise
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