First Ass Flashcards
Formation of a v shaped valley
Fast water causes erosion and makes a deep notch in the land
Abrasion scrapes along the sides and bottom and hydraulic action breaks down the sides
Freeze thaw then loosens soil and rocks which fall into water
When the river meets harder rock it bends around it causing interlocking spurs Making the valley
Water fall formation
Water passes over hard and soft rock eroding the soft faster creating an overhang due to hydraulic action. Then hard rock will fall under its own weight feeling the river bed making a plunge pool. It is then picked up by the water eroding soft rock even faster leaving a gorge
Meander formation
In a straight river pools and riffles develope as water twists around large things
Then a helicoidal flow is made which moves mats from outside of a meander bend and puts it inside
Fast water has more energy to erode on the outside making a river cliff
Continues erosion on the outback and. Depositioning on the inner will form a meander
Ox bow lake
As the process of the meander continues the neck of the meander will get narrower overtime during a flood this will be breached and water will create a straight channel
As this channel forms water will travel round the meander slower
The decrease leads to high levels of deposition at the start and exit of the meander until it’s blocked off
This leaves an ox bow lake
DATA collection
How often
10 years
How to check population
Civil reg
Dvla
Scottish household survey
Passport
NHS records
Reasons population can be inaccurate
Literacy can’t read can’t fill it in
Illegals unknown
Homeless no contact
Cost
Amount of enumerators needed(people you pay)
Problems with greying population
More healthcare needed
Unemployment
Increases migration
School closes
Diversion of money
More pensioners
Less tax
Podzol formation
Low temperatures lead to slow decomposition.needles and cones make acidic humus High precipitation leads to leaching which is the downward movement of the aluminium and iron oxides, this leads to formation of an iron pan Eluviation leaves an ash grey A horizon.
Illuviation leads to a reddish brown B horizon.
Human factors affecting development
Population zsizd
Education
Corruption
Laws
Conflict
Debt
Disease
What conditions do you find brown earth soil
Wet warm
What are the layers like in brown earth soil and why
Undefined as bugs live in here mixing it up
Primary health care benefits
Improves life expectancy
Low training costs
Local workers
Country gets wealthier
What can be found on top of a podzol
Pine trees/needles and cones
What climates are podzols found
Cold wet
