The Desert region
The Desert region
The Desert region
100
Name the two types of deserts.
Hot and cold
100
What goes deep into the ground in search of water
long roots
100
What is dry farming?
Dry farming or dry land farming is the practice of growing crops without irrigation in areas which receive an annual rainfall of 500mm - 750 mm or even less.
200
_____________ is the largest cold desert on Earth.
Antarctica
200
_________ are very common in desert regions.
dust storms
200
________________ are flightless birds found in the Sahara and Kalahari Deserts.
Ostriches
300
Define deserts.
Deserts are drylands having scanty or no rainfall and very little vegetation. A place which receives less than 25 centimeter of rainfall in a year is classified as a desert.
300
State any two adaptations that help plants to survive in the desert climate.
Long roots that go deep into the ground in search of water.
Leathery leaves with waxy coating to prevent water loss due to evaporation.
Fleshy stems to store water and thorns to protect these stems.
300
What are nocturnal animals?
Most desert animals rest during the day to avoid the heat.
They come out to eat and hunt only at night. They are called nocturnal animals.
400
Why are deserts also known as subtropical deserts?
Most of the hot deserts are located between
15°N and 35°S of the Equator (0°). Since the hot deserts lie near the Tropic of Cancer(23 1/2°N) and the Tropic of Capricorn(23 1/2°S), so they are also known as subtropical deserts.
400
Differentiate between hot and cold desert.
400
Name some desert tribes.
Tuaregs in Sahara Desert
Bushmen in the Kalahari Desert
Bedouins in Africa and Arabia Deserts
American Indians in the Patagonia Desert
Banjaras in the Thar Desert
Aborigines in Australian Deserts
500
Describe the hot desert climate.
Deserts experience extreme climate as they are arid, little or no rainfall and very low humidity.
Hot deserts are very hot, sunny and dry throughout the year, temperature varies greatly.
The day temperature - between 40 degree C to 45 degrees C, while the night temperatures can drop to about 5 degree C.
In winter, the night temperatures can even go below 0 degrees Celsius.
500
Describe the cold desert climate.
The cold deserts can have very hot and dry climate in the summer but during winter, the temperatures are freezing. Cold desert frequently experience snow.
The average summer temperature is 21 degrees Celsius to 27 degrees Celsius and during winters, it is 2 degree C to 4 degrees C.
There are cold desert regions in India in Jammu and Kashmir, Himachal Pradesh, Uttarakhand and Sikkim.
500
What is desertification
Some deserts are spreading very fast.
This process is known as desertification.
It is caused by overgrazing, deforestation, over cultivation and poor irrigation.
Desertification causes fertile land to change to non -productive waste lands.
This is harmful to our ecosystem.