Year 8 End of Year Exam Flashcards
What is Hydraulic Action?
This is the sheer power of the waves as they smash against the cliff. Air becomes trapped in the cracks in the rock and causes the rock to break apart.
What is Abrasion?
This is when pebbles grind along a rock platform, much like sandpaper. Over time the rock becomes smooth.
What is Attrition?
This is when rocks that the sea is carrying knock against each other. They break apart to become smaller and more rounded.
What is coastal erosion system of Solution?
This is when sea water dissolves certain types of rocks. In the UK, chalk and limestone cliffs are prone to this type of erosion.
What is the transport system of Solution?
When minerals in rocks like chalk and limestone are dissolved in sea water and then carried in solution. The load is not visible.
What is Suspension?
When small particles such as silts and clays are suspended in the flow of the water.
What is Saltation?
Where small pieces of shingle or large sand grains are bounced along the sea bed.
What is Traction?
Where pebbles and larger material are rolled along the sea bed.
How the landforms of coastal erosion are created?
By erosion (the wearing away of land by waves and wind) or by deposition (the building up of land through deposits of sand and other materials).
What an employment structure is and how it changes over time?
It is how the workforce is divided up between the three main employment sectors - primary, secondary and tertiary.
Employment structures change over time. Countries in the early stage of development usually have a high percentage of the population in primary employment.
What are the types of erosion?
Hydraulic action
Abrasion
Attrition
Solution
What are the types of sediment Transportations?
Traction
Saltation
Suspension
Solution
What is the Demographic Transition model?
It is a simplified way of looking at how population is changing and has changed around the world.
What is the birth rate high like in stage 1?
High
Why was the birth rate high in stage 1?
Lack of family planning
What is the death rate high like in stage 1?
High
Why is the death rate high in stage 1?
Bad medical care, sanitation and quality of food.
What is happening to the birth rate in stage 2?
High
Why is the birth rate high in stage 2?
High infant mortality rates
Bad family planning
Large families - culture and traditions
What is the death rate like in stage 2?
It falls rapidly.