Shared Flashcard Set

Details

crime and coasts
year 8
12
Geography
8th Grade
05/17/2010

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Cards

Term
types of crime
Definition
*knife
*gun
*anti-social behaviour
*drug
*domestic violence
Term
victim / offender
Definition
A Victim is a person who has suffered harm, physical or mental

An offender is a person who breaks the law
Term
target hardening
Definition
strengthening security.
Term
Waves
Definition
created by wind causing friction on sea surface producing a swell. The energy of the wind causes water particles to rotate and this carries wave forward
Term
waves break
Definition
water washes up on beach called SWASH.
water then runs backwards called BACKWASH
Term
types of waves
Definition
*constructive -swash stronger than backwash
*calm weather *less powerful
*break on shore * deposit material
*long wave length

*destructive -backwash stronger
*erodes coast *high and steep *short wave length
Term
coastal erosion
Definition
hydraulic -water breaks and compresses air trapped in cracks in cliffs which weaken cliff.
abrasion -bits of rock and sand grind cliff surface
attrition -waves smash rocks and pebbles on shore which become smoother
solution- acids in sea dissolve some types of rock eg chalk and limestone
Term
longshore drift
Definition
waves approach shore at angle due to wind direction and carry material up beach. backwash carries material staight back at 90 degrees to sea so transporting the material.
Term
wave cut platforms
Definition
when water erodes rock face to form a notch which gets deeper until ceiling falls and notch collapses forming a wave cut platform at cliff base
Term
stack
Definition
steep vertical column formed when part of headland is eroded by hydraulic action. Also forms when natural arches collapse due to gravitiy.
typically form in limestone
Term
spit
Definition
when a ridge of sand or shingle projects from land into water
formed by longshore drift, tides, currents and bends in coast.
When decrease in wave energy more material is deposited than transported bulding a spit.
Term
coastal protection
Definition
*dune stabilisation,
*cliff stabilisation,
*groynes-straight structure to trap sand
*detached breakwaters -structures parallel to shore
*nourish beaches
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