3.1 The living deserts

What are some characteristics of deserts?

• Sandy and flat

• Rocky and mountainous

• Covered with ice

• Filled with water

What is a common feature of all deserts?

• Abundance of rain and snow

• Lush vegetation

• Dryness

• Extreme heat

Which plant is commonly found in the deserts of North and South America?

• Cactus

• Saxaul

• Palm tree

• Fern

What is a special characteristic of cactus plants?

• Thick, waxy skin

• Soft and delicate leaves

• No need for sunlight

• Ability to swim

What is the saxaul plant known for?

• Storing water in its bark

• Growing in icy conditions

• Attracting birds with its flowers

• Producing sweet fruits

How much of the Earth's land is desert?

• One-fourth

• One-third

• Half

• Three-fourths

What happens when land turns into desert?

• More trees grow

• People can no longer grow food

• Rainfall increases

• Animals migrate to the area

Why do deserts grow larger every year?

• Excessive rainfall

• Deforestation and overgrazing

• Decrease in temperature

• Introduction of new plant species