| A | B |
| relative humidity | the amount of water vapor in the air |
| front | the boundary that forms between air masses |
| meterologist | a scientist who studies weather |
| air mass | a large body of air that has a similar temperature and humidity throughout |
| weather | the condition of the atmosphere at a particular time and place |
| atmosphere | the blanket of air surrounding a planet |
| humidity | the amount of water vapor the air contains compared with the maximum it can hold at that temperature |
| climate | the pattern of weather in area over a long period |
| air pressure | the measure of force with which air particles push on matter |
| troposphere | is the layer of the atmosphere that most weather takes place |
| Doppler radar | meterorologist use to measure the speed and direction of a storm |