4.9.1

Question 1

Greenhouse effect

Answer 1

greenhouse gases in the atmosphere maintain temperatures on Earth high enough to support life
allow SHORT WAVELENGTH radiation to pass through the atmosphere to the earth’s surface but absorb the OUTGOING LONG WAVELENGTH radiation from the earth causing an increase in temperature
water vapour, CO2 and methane are greenhouse gases

Question 2

increase in greenhouse gases

Answer 2

carbon dioxide—combustion of fossil fuels, deforestation

methane—more animal farming (digestion, waste decomposition), decomposition of rubbish in landfill sites

Question 3

climate change bad

Answer 3

sea levels rise—causing flooding and increased coastal erosion
more frequent and severe storms
changes in the amount of timing and distribution of rainfall
temperature nad water stress for humans and wildlife
changes in the food-producing capacity of some regions
changes to the distribution of wildlife species

Question 4

carbon footprint

Answer 4

total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event

Question 5

advantages of complete combustion

Answer 5

less soot is made
more heat per gram of fuel is released
CO isn’t produced

Question 6

pollution from combustion

Answer 6

CO2
H20
CO
Sulphur dioxide
Nitrogen oxides
particulates

Question 7

sulphur dioxide and nitrogen oxides

Answer 7

may cause respiratory problems in humans
cause acid rain
damages plants and buildings