Desert Flashcards

(43 cards)

0
Q

What happens when storms dump water fast

A

Runs off but creates channels that flood

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1
Q

What latitude do desert usually form

A

20-30 N or 20-30 S

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2
Q

What does the hydrosphere have to do with

A

Water availibility

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2
Q

What does the lithosphere have to do with

A

Desert formations

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4
Q

What happens when air between the hot from equator and cold from the poles mix

A

Form atmospheric pressure called pressure belts

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5
Q

When do desert lakes form

A

If there is enough rain

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6
Q

Have deep are desert lakes

A

Usually shallow

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7
Q

Are desert lakes usually permenent or temporary

A

Usually temporary

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8
Q

What happens when desert lakes dry up

A

Salt crust called playa

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9
Q

How do sand or dunes move

A

With wind

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10
Q

What is groundwater that flows under deserts called

A

Aquifiers

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11
Q

How do oasis form

A

Aquifiers running close to surface

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12
Q

How does water get into Aquifiers

A

Areas of high rainfall

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14
Q

How many wind directions are needed to make a cresent dune

A

1

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15
Q

Why do rivers not flow anywhere

A

High evaporation, if they do they have high sediment

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16
Q

What are longitudes dunes and how many directions of winds are needed to make them

A

Parallel ridges 2 directions

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17
Q

What percent of deserts are sand

A

20 %

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18
Q

How far can they move in one year

18
Q

What is the most common dune

19
Q

What do messa dunes look like

A

Flat top hills

20
Q

How many directions needed to make start dune

21
Q

What are butte formations

22
Q

What are messa dunes

A

Dunes from water erosion

23
Q

How are badlandss made and what are they

A

Dry gorges erosion

24
How are buttes made
Abrasion
25
What is abrasion
Sand blasted by wind
26
Arches are formed by
Abrasion
27
With clay soil on gibber plains, what is there little of
Vegetation
28
Pedestal rock have a what structure
Mushroom
29
Wadi are what
Sediment deposit. | Flat landscape
30
What desert has the most moving sand
rub' al Khali
31
What are stony plains
Plains with sand removed and pebbles left behind
32
What percent of deserts are stony plains
50%
34
What are gibber plains
Stony deserts on clay soil
35
What ere soils in deserts high and low in
High minerals low organic material.
36
How are desert landforms made
Wind blasting sand which is called abrasion.
37
What percent of deserts are made of rock formations
30 %
38
What are rock formations
Exposed rock or soil and river deposits like playa.
38
What is the biggest desert
Sahara
39
How far has dust from Sahara been carried
Uk and Germany
40
How hot can desert soil be
Up to 75 Celsius
40
How much rain does the atacma desert get
.8 mm each year
42
What is the atacma desert famous for
Driest desert