AQA A-LEVEL
GEOGRAPHY(COASTS) EXAM
PREP/COMPREHENSIVE STUDY
GUIDE/ACTUAL EXAM QUESTIONS
WITH EXPERT VERIFIED
SOLUTIONS)/NEWEST UPDATE
Save
Terms in this set (107)
sediment can be brought into the
system in various ways. Energy
Inputs
inputs come from wind, waves, tides
and currents.
e.g. sediment can be washed out to
Outputs sea or deposited further along the
shore.
, e.g. processes such as erosion,
weathering, transportation and
Flows/Transfers
deposition can move sediment
within the system.
Stores/Compon landforms such as beaches, dunes
ents and spits
when the effects of an action are
Negative
cancelled out by its subsequent
Feedback
knock-on effects.
when the effects of an action are
Positive amplified or multiplied by
Feedback subsequent knock-on effects (a
loop/cycle).
- Wind
Sources of - Wave
energy - Tidal
- Currents
, - created by the frictional drag of
the wind over the water.
- effect of wave depends on height.
height is determined by wind speed
and fetch of the wind.
- waves break as they approach the
shore. Friction with the sea bed
Wave Energy
slows the bottom of the waves.
Size of wave depends on 3 factors:
- Distance wave has travelled
- Time wind has been blowing
- Strength of the wind
height difference between a wave
Wave height
crest and the neighbouring trough
Wavelength distance between successive crests
time between one crest and the
Wave frequency
following crest passing a fixed point
, - swash greater then backwash
- weak backwash, low-energy
deposition
- form beaches
Constructive - long, not very high max 1m
waves - frequency 6-9/minute
- form in calm conditions with light
winds
- leads to formation of ridges
(berms)
- backwash greater than swash
- remove material from the beach
- erode the coastline
Destructive - 2-3m in height and steep
waves - frequency of 11-15/minute
- form in stormy conditions
- may form a ridge called a storm
beach
GEOGRAPHY(COASTS) EXAM
PREP/COMPREHENSIVE STUDY
GUIDE/ACTUAL EXAM QUESTIONS
WITH EXPERT VERIFIED
SOLUTIONS)/NEWEST UPDATE
Save
Terms in this set (107)
sediment can be brought into the
system in various ways. Energy
Inputs
inputs come from wind, waves, tides
and currents.
e.g. sediment can be washed out to
Outputs sea or deposited further along the
shore.
, e.g. processes such as erosion,
weathering, transportation and
Flows/Transfers
deposition can move sediment
within the system.
Stores/Compon landforms such as beaches, dunes
ents and spits
when the effects of an action are
Negative
cancelled out by its subsequent
Feedback
knock-on effects.
when the effects of an action are
Positive amplified or multiplied by
Feedback subsequent knock-on effects (a
loop/cycle).
- Wind
Sources of - Wave
energy - Tidal
- Currents
, - created by the frictional drag of
the wind over the water.
- effect of wave depends on height.
height is determined by wind speed
and fetch of the wind.
- waves break as they approach the
shore. Friction with the sea bed
Wave Energy
slows the bottom of the waves.
Size of wave depends on 3 factors:
- Distance wave has travelled
- Time wind has been blowing
- Strength of the wind
height difference between a wave
Wave height
crest and the neighbouring trough
Wavelength distance between successive crests
time between one crest and the
Wave frequency
following crest passing a fixed point
, - swash greater then backwash
- weak backwash, low-energy
deposition
- form beaches
Constructive - long, not very high max 1m
waves - frequency 6-9/minute
- form in calm conditions with light
winds
- leads to formation of ridges
(berms)
- backwash greater than swash
- remove material from the beach
- erode the coastline
Destructive - 2-3m in height and steep
waves - frequency of 11-15/minute
- form in stormy conditions
- may form a ridge called a storm
beach
