Biophysical Processes - Coastal Dune Systems

What is the main process that forms coastal dune systems?

• The accretion cycle

• The erosion cycle

• The deposition cycle

• The vegetation cycle

Which spheres interact to form coastal dunes?

• Biosphere, Cryosphere, Exosphere, and Thermosphere

• Hydrosphere, Cryosphere, Lithosphere, and Atmosphere

• Atmosphere, Lithosphere, Hydrosphere, and Biosphere

• Mesosphere, Stratosphere, Troposphere, and Magnetosphere

What role does vegetation play in coastal dune systems?

• It traps and stabilizes the sand

• It enhances erosion

• It attracts more wildlife

• It has no significant role

What is the major material in coastal dune systems?

• Sand

• Clay

• Silt

• Gravel

How does wave action affect coastal dunes?

• It only causes erosion

• It can deposit or remove sand

• It has no effect

• It only deposits sand

What is aeolian transport?

• The deposition of organic matter

• The movement of sand by the wind

• The movement of water

• The erosion of rocks

What happens when the swash is stronger than the backwash?

• No significant change

• Increased wave energy

• Erosion

• Deposition

What are destructive waves characterized by?

• Rapid evaporation

• Slow movement and low impact

• Large size and high energy

• Small size and low energy

What is longshore drift?

• The deposition of sand from rivers

• The movement of sand along the beach

• A type of coastal vegetation

• A method of coastal management

What causes east coast lows?

• Low atmospheric pressure systems off the east coast of Australia

• High atmospheric pressure systems in the interior of Australia

• Seasonal changes in ocean currents

• Tectonic activity beneath the ocean floor