Geography EOYT

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  • Created by: lucietown
  • Created on: 30-03-17 10:59
how does a sand dune begin to form?
wind blows sand up the beach where it gets trapped behind obstacles (wood/rocks.)
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what is the earliest type of sand dune to form?
embryo dune
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what is hard engineering?
man-made work, expensive and takes time.
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what is soft engineering?
natural/physical materials and it is cheap.
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types of hard engineering are...
sea wall, groynes, rip rap, gabions.
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types of soft engineering are...
do nothing, beach nourishment & re-shaping, sand dune planting.
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erosional land forms (features) are...
cliffs, erosion headlands, bays, wave cut platforms.
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depositional landforms are...
spits, beaches, bars, sand dunes.
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longshore drift is...
firstly waves approach the beach at an angle similar to that of the wind. the swash carries material up the beach following the angle of the waves. the process is a repetitive zig zag pattern. overtime material that was carried gets deposited.
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fetch
the distance waves have travelled eg. across the Atlantic or across the north sea.
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constructive waves
low waves that surge up the beach, gentle beach, crests are apart
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destructive waves
crests are close together, strong backwash
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mechanical weathering
the disintegeration of rocks
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chemical weathering
caused by chemical changes. rainwater which is slightly acidic
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biological weathering
due to actions of flora and fauna, plant roots grow in cracks in the rocks.
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mass movement
typical on chalk cliff. rockfall occurs when chemical weathering appears. mass movement can lead to cliff collapse.
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massmovment can be...
landslide, slumping, mud flow, rockfall.
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Other cards in this set

Card 2

Front

embryo dune

Back

what is the earliest type of sand dune to form?

Card 3

Front

man-made work, expensive and takes time.

Back

Preview of the back of card 3

Card 4

Front

natural/physical materials and it is cheap.

Back

Preview of the back of card 4

Card 5

Front

sea wall, groynes, rip rap, gabions.

Back

Preview of the back of card 5
View more cards

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