Sorry it took me so long....
1) Troposphere
2)Oxygen and Nitrogen
3) colder
4) Gulf Stream
5) Maritime Tropical
6) Direction from which they originate (Southerly comes from the south)
7) High
8) Westerly
9) Percentage of water vapour in the air
10) clouds and precipitation
11) San Francisco
12) Clear and windless night
13) Cumulonimbus
14) Cold air moving into a valley, ground near the ground cooling on a cold night so that it is colder than the air above it.
15) Poor air quality can cause breathing problems/ asthma
