5.13

Question 1

List three greenhouse gases

Answer 1

Carbon dioxide, methane, nitrous oxide, water vapour, CFCs

Question 2

Give a definition of the term anthropogenic

Answer 2

Caused by human activity

Question 3

Explain how greenhouse gases lead to the greenhouse effect

Answer 3

1. UV rays from the sun can pass through the atmosphere and warm the earths surface
2. The Earth absorbs the radiation and reradiates it as longer wavelength infrared
3. The longer wavelength cannot pass through greenhouse gases which absorb it - warming the atmosphere in the greenhouse effect

Question 4

Give a definition of global warming

Answer 4

Gradual increase in average global surface temperatures