chapt 19 (air maintaining)

Question 1

how are oxides of nitrogen formed (1)

Answer 1

• oxides of nitrogen formed due to hot atmosphere and presence of nitrogen and oxygen. (NO, NO2)

Question 2

how is co2 regulated in atmosphere (1)

Answer 2

• CO2 regulated by carbon cycle through production of co2 ( respiration, decomposition, combustion) and removal (photosynthesis and ocean uptake)

Question 3

what causes air pollution (7)

Answer 3

• production of co2 cause air pollution (sulfur dioxide, oxides of nitrogen, co, methane, unburnt hydrocarbon and ozone formed)

Question 4

acid rain and global warming

Answer 4

• cause acid rain(no2 and so2) and global warming (co2 and ch4) = desertification, heat waves, ocean warming, ice caps melt, extreme weather.