| A | B |
|---|
| Forecast | A prediction of what the weather will be like in the near future |
| Air Pressure | The force of air against the Earth's surface |
| Humidity | Water vapor in the air |
| Relative Humidity | A measurement that compares the amount of water vapor in the air with the amount the air can hold at a certain temperature |
| Dew Point | The temperature at which a volume of air cannot hold any more water vapor |
| Climate | The temperature and weather of an area taken over a long period of time |
| barometer | an instrument used to measure air pressure |
| anemometer | an instrument used to measure wind speed |
| psychrometer | an instrument used to measure relative humidity |
| Doppler radar | a type of radar that calculates distance and shows direction of movement |
| satellite | a man made instrument that orbits the Earth and helps to predict weather |
| air mass | a large body of air having similar properties or weather conditions |
| front | the boundary between warm and cold air masses |
| cumulonimbus cloud | a verticle cloud that usually brings thunderstorms |
| stratus cloud | a low level cloud that is grayish in color and brings precipitation |
| thunderstorm | a storm that happens as warm air rises quickly |
| downdraft | downward air currents |
| updraft | upward air currents |
| tornado | a violent funnel-shaped cloud with extremely strong winds |
| hurricane | a large tropical storm that forms over warm oceans whose winds have a velocity of atleast 110 kilometers per hour |
