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1

In deserts what is the main source of erosion?

Air or wind

 

 

 

2

In glaciers what is the main agent of erosion?

ice

3

_____ and _____ can be sensitive indicators to climate change

deserts, drylands

4

Deserts make up how much of Earth's land area?

25%

5

What are the two criteria that a "desert" has to meet for it to be a desert?

- Must receive less then 255mm of rainfall per year

-sparsely vegetated

6

How do we split up, divide, or categorize deserts?

two categories: 

- deserts formed by global air circulation

- deserts formed by local climate conditions

7

Which two types of deserts are formed based on their location on the globe (global air circulation)?

- subtropical deserts

- polar deserts

 

 

8

Global circulation units lead to up flows of warm and wet air at the ______

equator

9

bands of ______ form some of the major deserts

latitudes

10

Subtropical deserts are located at approximately _____ degrees North and _____ degrees South

30, 30

11

Where are polar deserts located?

at approximately 90 degrees North and south

12

Do polar deserts get a lot of snow?

no, whatever snow they get just never goes away

13

What 3 kinds of deserts form due to local climate conditions?

- continental interior deserts

- rain shadow deserts

- coastal deserts

14

_____ ______ deserts are located far inland

continental interior

e.g. 

Gobi Desert, north China/ South Mongolia 

15

Are continental interior deserts located close to a source of water?

No

16

Where do rain shadow deserts form?

along mountain ranges

E.g. 

death valley, rain blocked by Sierra Nevada mtns

 

17

Mountain ranges serve as a _____ to block precipitation

barrier

18

What happens when clouds and weather systems come towards a mountain?

As clouds and weather systems come towards a mountain the steepness and height of a mountain forces that air system up and as it rises it drops a lot of it precipitation so by the time it reaches the other side of the mountain it is very dry air.

19

where do coastal deserts form?

along the oceans

e.g.

Atacama desert, Chile. Driest place on Earth

 

20

Do coastal deserts form along the western or eastern side of continents?

western

21

Coastal deserts form along the _____ side of continents because there are very cold ocean currents flowing next to the land.

western

22

What do cold ocean currents cause?

cold air

23

Cold air holds _____ moisture so there is ____ precipitation

less, little.

24

Where is the Atacama desert?

in South America, along the Andes mountains

25

As clouds and weather systems come towards a mountain the ______ and _____ of a mountain forces that air system up. 

steepness, height

26

As clouds and weather systems rises they drop a lot of _______ so by the time the system reaches the other side of the mountain there is very _____ air.

precipitation, dry

27

Are deserts and glaciers rare or common environments?

rare

28

Why are deserts and glaciers rare environments?

because water is not the main erosional force, air and ice are

29

Deserts and Glaciers are two types of _____ environments

rare

30

Deserts and Glaciers are two rare types of environments where _____ is not the main erosional force, but _____ is. 

water, air/wind