Deserts

• Video 115 Degrees in the Desert

• Title Page : Deserts

Deserts Video

Listen to and answer the following questions:

1. What is a desert?

2. How hot does it get during the day?

3. How cold does the desert get at night?

4. Most deserts are made of _ _ _ _ _

and _ _ _ _ _ _

Deserts Video

Listen to and answer the following questions:

1. What is a desert? An area that receives less than 250

millimetres of rainfall annually

2. How hot does it get during the day? 500C

3. How cold does the desert get at night? -200C

4. Most deserts are made of rocks and stones.

Types of Deserts

Arid Desert• Located between 20°-30° from the equator

• Little humidity

• More solar radiation during the day hot, dry days

• Easy to lose heat during the night

cold, dry nights

• Low rainfall in concentrated periods

Semi-Arid Desert

• Located between 30°-50° from equator

• Weather:

• Long, dry summers

• Cool evenings

• Low rainfall in concentrated periods

Cold Desert

• Winter: long and cold characterised by snowfall• Summer: moist, moderately warm• Mean temperature range: -210C to 40C

Coastal Desert

• Location: Western edge of continents near the Tropic of Cancer and Tropic of Capricorn

• Cause: cold ocean currents

• Weather:• Summer: moderately warm and

long• Winter: cool

Where are deserts located?Using the world map provided, copy the location of the deserts from page 159.

Make sure you use BOLTS and label the map exactly as it appears in figure 7.4

Once finished, answer Questions 2-5 on page 159.

Where are deserts located?

Key Terms

Oasis• A place in the desert where there is a source of

water and where plants grow.

Key Terms

Desertification:• the process by which useful agricultural areas on desert fringes change

into desert due to poor farming practices

Key Terms

Butte

A flat-topped hill with steep sides; a column of rock.

Atmospheric Process: Hot Air Current