Coasts - Waves Flashcards
1
Q
Destructive waves
A
- erode the coast
- high amounts of energy
- very powerful waves
2
Q
Constructive waves
A
- builds coasts
- less energy is being transferred into the water
3
Q
Wave height
A
The height of a wave
4
Q
Break wave
A
-wave that changes in height or shape at the sea gets shallower when it reaches land
5
Q
Swash
A
The part of the wave that moves forward onto land
6
Q
Wave length
A
The length of a wave
7
Q
Wave crests
A
The top of the wave
8
Q
Wave trough
A
The low between 2 crests
9
Q
Backwash
A
The retreating (moving backward) of a wave -in a destructive wave it is very strong as it takes away pieces of the land
10
Q
Waves are formed by…
A
The transfer of energy via friction due to the wind against the water
11
Q
Size of the wave is influenced by
A
The wind
12
Q
3 effects of wind that impact waives
A
- speed
- distance
- times
13
Q
Wind speed
A
- fast wind speeds result in powerful waves
- this due to the wind having more energy to transfer
14
Q
Wind duration
A
- winds length of time
- the longer the wind has been blowing the more energy the wave has
- this is because energy has been transferred over a long period of time
15
Q
Wind fetch
A
- maximum distance of open sea wind can blow over
- if the fetch is long, powerful waves are created
- because wind has larger area over which it can constantly provide energy to
