Marine processes

Question 1

Wave types

Answer 1

Types:
- Constructive
- Destructive

Length
Height
Frequency

Question 2

Beach profile

Answer 2

Summer = steep
Winter = flat - storm berms and greater variation in size

Question 3

Erosion types

Answer 3

Abrasion
Hydraulic action
Corrosion
Attrition

Question 4

Factors affecting erosion

Answer 4

Wave type and Wave size = affects amount of erosion

Lithology = affects rate of erosion

Question 5

Coastal Landforms

Answer 5

Abrasion and Hydraulic action = wave cut platform - leaves the more resistant rock

Larger the platform = decrease erosion due to friction - example of a negative feedback loop

Wave refraction = headland

Wave refraction starts the process of = Cave, arch, stack, stump
Cave = hydraulic action and attrition
Arch = erosion
Stack = gravity collapses the cave roof, stack gets undercut leading it to topple and fall as it is unsupported
Stump = weathering, hydraulic action and attrition

Question 6

How is material moved/transported

Answer 6

Traction = rolled
Saltation = bounced
Suspension = suspended in water flow
Solution = water dissolves rock and then transports it in solution

Wave tides
Currents
Wind
Deposition
Flocculation = causing the sediment
to clump together and settle

Question 7

Longshore drift

Answer 7

Waves approach at an angle
Swash carries up beach
Backwash carries away at 90 degrees/right angle

Question 8

Tides are determined by what

Answer 8

Gravitational pull of sun or moon

Question 9

Deposition landforms

Answer 9

Beaches = drift aligned due to longshore drift
Beaches = swash aligned due to low energy

Spit
Lagoon
Tombolo

Question 10

Sediment cell

Answer 10

Input = source
Transfers
Stores
Sinks