1. What do all deserts have in common?
a. hot weather
b. sand
c. little rainfall
d. camels

2. Which continent is affected by desertification?
a. Asia
b. Africa
c. North America
d. all of them

3. What is the single largest cause worldwide of desertification?
a. wind
b. overgrazing
c. drought
d. farming

4. What is a camel's hump made of?
a. fat
b. water
c. bone
d. hair

5. How many plants species are
estimated to grow in the Sahara?
a. 80
b. 450
c. 750
d. 1,200

6. How long has the Atacama desert in Chile gone without rain?
a. 10 months
b. 14 years
c. 40 years
d. 90 years

7. How much of the Earth's land area is covered by deserts and drylands?
a. 5 per cent
b. 13 per cent
c. 20 per cent
d. 40 per cent

8. Can it snow in a desert?
a. yes
b. no