| A | B |
|---|
| Air Pressure | the pressure that a column of air exerts on the air or surface below it |
| Dew Point | temperature at which air near the ground becomes fully saturated with water |
| Humidity | amount of water vapor in the air |
| Kinetic Energy | the energy an object has due to its motion |
| Precipitation | water, in liquid or solid form, that falls from the atmosphere |
| Relative Humidity | amount of water vapor present in the air relative to the maximum amount of water vapor the air can contain at that temperature |
| Variable | a quantity that can change |
| Water Cycle | a series of natural processes in which water continually moves among oceans, land, and the atmosphere |
| Weather | atmospheric conditions of a certain place at a certain time |
| Air Mass | large body of air with distinct temperature and moisture characteristics |
| Blizzard | violent winter storm characterized by freezing temperatures, strong winds, and blowing snow |
| Dominate | to exert the guiding influence on |
| Front | boundary between two air masses |
| High-Pressure System | large body of circulating air that has high pressure at its center and lower pressure on the outside |
| Hurricane | intense tropical storm with winds exceeding 119 km/h |
| Low-Pressure System | large body of circulating air that has low pressure at its center and higher pressure on the outside |
| Tornado | violent, whirling column of air that comes in contact with the ground |
| Computer Model | detailed program that solves a set of complex mathematical formulas |
| Doppler Radar | specialized radar that can detect precipitation and movement of small particles and can approximate wind speed |
| Isobar | line on a map used to connect all places where air pressure has the same value |
| Surface Report | describes a set of weather measurements made on Earth’s surface |
| Upper-Air Report | describes wind, temperature, and humidity conditions above Earth’s surface |
