1.1B - Hot DESERTS.

Question 1

(2)

Where can hot deserts be founded?

Answer 1

• 30 degrees N/S
• EQUATOR: low air pressure
  HOT TEMPERATURES 30*N/S
  HIGH AIR PRESSURE.

Question 2

(4)

How are plants adapted to live in hot deserts?

Answer 2

SAGUARO CACTUS:
- THICK, WAXY cuticle
- able to expand.

MESQUITE TREE:
- Long, deep TAP roots
- Reach water table
- Absorb WATER FOR GROWTH.

Question 3

(6)

How are certain animals adapted to live in hot deserts?

Answer 3

FENNEC FOX:
- THICK FUR
- VASODILATION: more bloodflow near surface of skin.
- Unique feet: THICK PADS for PROTECTION.

CAMELS:
- HUMPS store FAT
- FAT breaks down into WATER
- Able to SURVIVE for LONG PERIODS OF TIME.

Question 4

What is desertification?

Answer 4

Degradation of land
Lack of VEGETATION.

Question 5

(3)

Explain how climate change causes desertification.

Answer 5

• Lack of rainfall
• Less water available for plant growth
• More plants DIE.

Question 6

(3)

Explain a human activity that causes desertification.

Answer 6

• Over-cultivation
• CONTINUOUS GROWING of plants in same area
• All nutrients used up
• Lack of growth OVERTIME.

Question 7

(2)

Explain how desertification can be minimised.

Answer 7

• Use drip irrigation on crops
• Less soil erosion