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Geography AS > Things I don't know > Flashcards

Things I don't know Flashcards

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1
Q

Definition of arid desert

A

Less than 250mm a year

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2
Q

Definition of semi-arid desert

A

250mm-500mm a year

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3
Q

Definition of hyper-arid

A

Less then 50mm a year

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4
Q

Hammada

A

Barren and rocky ground

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5
Q

Reg

A

Gravel/pebble plain

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6
Q

Erg

A

Predominantly sand dunes

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7
Q

Posh name desert soils

A

aridisols

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8
Q

Insolation weathering

A

Expansion and contraction of rocks until they exfoliate

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9
Q

duricrust

A

Salt crust

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10
Q

Exogenous river

A

Source is outside of desert`

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11
Q

endoreic rivers

A

Terminate in deserts

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12
Q

Ephermal rivers

A

Follow seasonally or during flash floods

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13
Q

Green wall project

A

15km tree belt in senegal

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14
Q

Baseflow

A

Slow transfer through rocks

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15
Q

Water budget- what is it and what are the four stages

A 
Shows change in water balance
Recharge
Surplus
Utilizations
Deficit
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16
Q

Recharge
Surplus
Utilizations
Deficit

A

Recharge- precipitation exceeds evapotranspiration- yet to reach field capacity
Surplus- soil reaches full field capacity
Utilizations- evapotranspiration exceeds precipitation but soil storage is yet to reach 0
Deficit- soil storage reaches 0

17
Q

Vertical erosion

A

Removal of material by cutting into rock by rivers in the upper course

18
Q

Lateral erosion

A

General erosion or removal of surface material in the middle and lower course

19
Q

How to calculate hydraulic radius (efficiency of river)

A

CSA/Wetted perimeter

20
Q

Orogenensis/isostatic change

A

Land change –> rejuvenation

21
Q

Eustatic change

A

Sea level change

22
Q

Prevalence rate

A

No. people suffering from a disease at one time

23
Q

Incidence rate

A

How many people developed a disease in a population over a year

24
Q

Case mortality rate

A

Number of people dying from a particular disease

25
Q

Difference between undernourishment and malnutrition

A

Undernourishment is a lack of quantity malnutrition is lack of quality

26
Q

Malthusian view vs Boserupian view

A 
M= reduction in population is good due to less strain on resources 
B= bad because it leads to economic slow down
27
Q

Snowy mountain scheme

A

Australia in 50s built damns and supplies water for 60% of food and wine production

Geography AS (6 decks)

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