Coasts Flashcards
What is swash?
Is the movement of water up the beach
What is backwash?
Is the movement of water down to the beach (back to the ocean)
What are the two types of waves?
Destructive and constructive waves
Name 4 characteristics of constructive waves
- Long wavelength
- Short height
- Shallow gradient
- Elliptical orbit
Name 4 characteristics of destructive waves
- Short wavelength
- High height
- Steep gradient
- Circular orbit
Name 4 factors that affect coastal landforms and coastal processes
- Waves and currents
- Local geology
- Changes in sea levels
- Human activities
What is longshore drift?
It is the movement of material along the beach by wave action at a specific angle, which makes sediment be moved diagonally through the beach.
What is wave refraction
Is the bending of waves created by the sea bed
What happens if refraction of waves is not complete?
Longshore drift occurs
What types of erosion are carried by waves?
- Hydraulic action
- Abrasion
- Attrition
- Solution
Name 6 features of erosion on coastal areas
- Cave
- Arch
- Stack
- Stump
- Cliff
- Wave cut platforms
- Bays
Name 6 features of deposition on coastal areas
- Beaches
- Bars
- Lagoons
- Spits
- Tombolos
What is an arch?
Is a coast landform of erosion that has she shape of a bridge
What is a bar?
A bar is a costal landform of deposition formed by longshore drift that makes a space between a lagoon and the sea.
What is a tombolo?
A tombolo is a bar that links to an island
