Lesson 7

Question 1

Do humans cause drought?

Answer 1

Don’t directly but they indirectly contribute towards the causes of drought

Question 2

How do humans cause drought? (6)

Answer 2

deforestation
climate change
politics
Air pollution
Dams
Swimming pools

Question 3

How does deforestation cause drought?

Answer 3

Water leaves area, less chance of reliving. Less transpiration = Less rainfall

Question 4

How does climate change cause drought?

Answer 4

Increased drought due to little rain fall

Question 5

How does politics cause drought?

Answer 5

Weather left population vulnerable, fights over land

Question 6

How does air pollution cause drought?

Answer 6

caused atmospheric cooling in 1960s, changed global heat budget

Question 7

How do dams cause drought?

Answer 7

Stop water getting into river

Question 8

How do swimming pools cause drought?

Answer 8

Too much water taken from ground water stores (over abstraction)

Question 9

How does drought influence wetlands? (5)

Answer 9

Effect local businesses, fish and birds leave fishermen can’t catch (local supply decreases).
Loss of habitat
Soil erosion
Organic soil oxides (release carbon into atmosphere) water availability decrease, pollutants increase.
Creates gaps in food chain

Question 10

How does drought influence forest ecosystems? (6)

Answer 10

Reservoir at record low.
3D mapping to look at moisture levels in trees.
58 million people in drought stress on California.
88 million vulnerable trees.
29 million trees died.
trees take 2-4 years to recover from drought.