| A | B |
|---|
| condensation | a change of state from gas to liquid |
| freezing | change of state from liquid to solid |
| phase change | a change in a solid, liquid, or gas to another state of matter |
| deposition | water vapor changes directly to a solid; snow and frost form this way |
| humidity | a measure of the water vapor content in the air |
| stratosphere | the layer of earth's atmosphere above the troposphere |
| dew point | the temperature at which water vapor condenses into liquid |
| sublimation | a phase change from solid to gas |
| evaporation | a phase change from liquid to gas |
| relative humidity | humidity as a percent |
| troposphere | the lowest layer of the atmosphere where weather occurs |
| fog | water droplets suspended at earths surface |
| melting | phase change from a solid to a liquid |
| water cycle | continuous circulation of water |
| dry line | a boundary where moist air meets dry air; storms occur to the east of this |
| isobar | lines of connecting air pressure |
| supercell | the largest form of a thunderstorm |
| front | a boundary between two masses of air |
| kinetic energy | energy of motion |
| thunderstorm | a storm having thunder a lightning |
| Fujita scale | used to classify tornadoes |
| lightning | emission of visible light during a storm |
| tornado | violently spinning column of air |
