coastal processes P1

• How many parts will the coastal processes video be split into?

  Two
• What will be looked at in the first part of the coastal processes video according to the learning objectives?

  Two types of weathering
• What else will be looked at in the first part of the coastal processes video according to the learning objectives?

  Three types of mass movement
• What else will be looked at in the first part of the coastal processes video according to the learning objectives?

  Destructive versus constructive waves
• What is weathering?

  Breakdown of rock in situ
• What does 'in situ' mean?

  Where it is
• How many types of weathering are there?

  Two
• What is mechanical weathering?

  Breakdown of rock without changing composition
• What is chemical weathering?

  Breakdown of rock by changing composition
• How does freeze-thaw weathering work?

  Water freezes, expands, thaws, contracts, and widens cracks
• What happens during carbonation?

  Carbonic acid reacts with calcium carbonate
• What is the simple explanation of carbonation?

  Rock is dissolved by rainwater
• What is mass movement?

  Shifting of rocks down a slope
• When does mass movement occur?

  Gravity is greater than support force
• What does mass movement cause coasts to do?

  Retreat rapidly
• How many types of mass movement are mentioned?

  Three
• What are the three types of mass movement?

  • Sliding
  • Slumping
  • Rockfall
• What happens during sliding?

  Materials shift in a straight line
• What happens during slumping?

  Material rotates along a curved plane
• What happens during rockfall?

  Material breaks up and falls down
• What creates waves on the sea surface?

  Wind
• How many types of waves are described?

  Two
• What are the two types of waves?

  • Destructive
  • Constructive
• What are the two types of waves?

  • Destructive
  • Constructive
• What do destructive waves do?

  Erode the coast and destroy the beach
• What do constructive waves do?

  Deposit material at the coast
• Which is more powerful in destructive waves?

  Backwash
• Which is more powerful in constructive waves?

  Swash
• What is the result of constructive waves having a more powerful swash than backwash?

  Material is deposited
• What is backwash?

  Water moving down the beach
• What is swash?

  Water moving up the beach
• What is the definition of erosion in the context of coastal geography?

  Rocks broken down and carried away
• How many types of erosion are detailed in the study material?

  Three
• What is the name for the type of erosion where waves compress air within rock cracks?

  Hydraulic power
• What type of erosion involves eroded particles scraping against rock?

  Abrasion
• How does hydraulic power cause erosion?

  Compressed air widens cracks in rocks
• In abrasion, what causes the removal of small pieces of the seabed?

  Eroded particles in the water
• Which erosion process involves particles colliding and breaking into smaller, rounded pieces?

  Attrition
• What happens to eroded particles during attrition?

  They become smaller and more rounded
• What force determines the direction of longshore drift?

  The prevailing wind