| A | B |
| Air mass | An huge body of air that has temperature and humid air. It forms depend on the temperature and the humidity level of the place it is in. |
| Maritime air mass | air mass that forms over oceans and is moist |
| Continental air mass | air mass that forms over the land and is dry |
| maritime arctic | produces a very cold and moist air mass |
| continental tropical | produces a hot and humid dry air mass |
| maritime tropical | produces a warm and moist air mass over a warm ocean |
| continental arctic | produces a very cold and dry air mass |
| continental polar | produces a cold and dry air mass over a cold land |
| maritime polar | produces a cold and moist air mass over a cold ocean |