On average, how much rainfall do deserts receive each year?
More than 250 mm
Less than 250 mm
250 mm
What is the temperature range of deserts in the summer season?
35-40°C
40-50°C
40-45°C
Generally, what colour are desert soils?
Yellow
Grey
Orange
What is the name given to plants which have adapted to hot and dry conditions?
Epiphyte
Saprophyte
Xerophytic
How long are tap roots?
5-7 metres long
10-15 metres long
7-10 metres long
Where do succulents store water?
In the fruits and roots
In the stems, leaves, roots and fruits
In the stems and leaves
Which crops are commercially farmed in the desert?
Cotton and wheat
Sugar cane and barley
Rice and corn
What is desertification?
The process of land turning into desert as the quality of the soil declines over time
The process of land losing vegetation
The process of land losing nutrients
What are the main causes of desertification?
Tropical storms and melting polar ice caps
Population growth, removal of wood, soil erosion, overgrazing and climate change
Government legislation and international agreements
Which strategies can reduce desertification?
Felling trees, building houses and cattle farming
Increased intensity of agriculture, monocropping and tilling
Planting trees, improving soil quality and water management