Test
Waves and longshore drift: constructive and destructive
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Preguntas del test (12)
1Constructive waves have a strong [blank_start]swash[blank_end] and weak [blank_start]backwash[blank_end]. They deposit [blank_start]sand[blank_end] and [blank_start]pebbles[blank_end] which 'constructs' the beach.
- Aswash
- Bbackwash
- Csand
- Dpebbles
2Destructive waves have a weak [blank_start]swash[blank_end] and a strong [blank_start]backwash[blank_end]. They a close together
- Aswash
- Bbackwash
3The top/peak of a wave is called the [blank_start]crest[blank_end]. The area that the wave travels over before hitting the beach is called the [blank_start]fetch.[blank_end]
- Acrest
- Bfetch.
4The [blank_start]trough[blank_end] is the 'dip' in the wave. The distance between these aspects is called the [blank_start]wavelength[blank_end]. Destructive waves a [blank_start]small[blank_end] wavelength and constructive waves have a [blank_start]large[blank_end] wavelength,.
- Atrough
- Bwavelength
- Csmall
- Dlarge
5Label this Longshore Drift Diagram
- APrevailing Wind
- BSwash
- CBackwash
- DHorizontal Line
- EShoreline
- FFetch
6During [blank_start]Longshore Drift[blank_end], the wave swashes up the beach carrying sediment and pebbles. If not all of it is [blank_start]deposited[blank_end], it retreats back to the sea in a [blank_start]backwash[blank_end]. Another wave picks it up at the [blank_start]angle[blank_end], and the same cycle happens again. As the sediment moves [blank_start]down the shore[blank_end], [blank_start]groynes[blank_end] can be installed to block off the sediment.
- ALongshore Drift
- Bdeposited
- Cbackwash
- Dangle
- Edown the shore
- Fgroynes
7An [blank_start]Off-shore wind[blank_end] is a wind that opposes the wave, resulting in the crest staying present for longer. This is what surfers would want
- AOff-shore wind
8Water gets into cracks, trapping air. This creates a build-up of pressure resulting in breaks. An example of this can be the first stage of the formation of a wave cut platform.
- AAbrasion
- BHydraulic Action
- CAttrition
9Chemicals in the water react with the rocks, resulting in them being broke down.
- ASolution
- BAbrasion
- CAttrition
10Rocks smack against each other creating smaller and smaller rocks. Sand is eventually made.
- AAbrasion
- BAttrition
- CHydraulic Action
11Rocks smack against large rocks (cliffs), weakening them each time.
- AHydraulic Action
- BAttrition
- CAbrasion
12A [blank_start]prevailing wind[blank_end] hits the beach in the form of [blank_start]constructive waves[blank_end]. Longshore drift occurs as [blank_start]sand[blank_end] and [blank_start]sediment[blank_end] is carried along the coast. When this process reaches the [blank_start]mouth of the river[blank_end], it continues to occur, moving out into the mouth. This is called a [blank_start]spit[blank_end]. River water, sediment and [blank_start]alluvium[blank_end] builds up in the area in the behind the spit. This is called a [blank_start]creek[blank_end]. [blank_start]Mud flats[blank_end] and [blank_start]salt marshes[blank_end] a created from this in the creek. The spit never reaches the other side of the lan as the [blank_start]estuary[blank_end] needs to come out into the sea.
- Aprevailing wind
- Bconstructive waves
- Csand
- Dsediment
- Emouth of the river
- Fspit
- Galluvium
- Hcreek
- IMud flats
- Jsalt marshes
- Kestuary
Información
- Descripción
- Test sobre Sin título, creado por Bradley Young el 22/09/2017.
- Autor
- Bradley Young
- Idioma
- English
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