Coasts Geography Flashcards
What is hydraulic action?
The hammering of waves breaks up the rock
What is the difference between abrasion and attrition
Abrasion is when pebbles and sand get flung against the rock, scraping and scouring it away whereas attrition is when rock fragments and pebbles wear each other away
What is solution
Water dissolves some materials
What is accumulation
Where material is gathered in a specific place, on one side of a groyne, for example
What is starvation
The lack of a material
How do you calculate the speed of longshore drift?
Distance travelled ÷ time taken
What is longshore drift measured in?
m/s
What is the first step in measuring longshore drift
Throw an apple into the sea at one groyne
What is the second step in measuring longshore drift
Measure how far it gets in five minutes
What is the third step in measuring longshore drift
See which direction it went in
What is the fourth step in measuring longshore drift
Calculate the speed of longshore drift
What is a stump
The base of a stack will be continually attacked by the sea making it unstable and eventually the stack will collapse, forming a stump
What is a stack
Continued erosion at the base of an arch will make it unstable, the roof eventually collapses into the sea
