living world hot deserts

Question 1

temperatures in a hot deserts

Answer 1

extreme range of temps lack of clouds cover leads to hot days 50 c plus and and cold nights sub zero

Question 2

rain fall in hot deserts

Answer 2

250 mm per year

Question 3

soil in hot deserts

Answer 3

dry (aridisols) sandy and Stony little organic matter often saline due to high evaporation rates

Question 4

over grazing

Answer 4

too many animals which destroy vegetation

Question 5

overcultivation

Answer 5

overusing the land to grow crops and nutrients and exhausted

Question 6

deforestation

Answer 6

trees cut down for firewood removing shade and roots to bind soil

Question 7

climate change

Answer 7

made made and natural can reduce rainfall and increases temperaters

Question 8

water and soil management

Answer 8

irrigation must be managed to avoid salinisation (salt being left behind from rapid evaporation) which makes soils toxic

Question 9

tree planting

Answer 9

roots bind soil and prevent soil erosion provides shade

Question 10

appropate technology

Answer 10

magic sones in Burkina Faso laid in lines across a slope traps soil and water and have increased crop yields by 50 percent

Question 11

desertification

Answer 11

the process where land gradually turns into desert affects the edge of deserts