| A | B |
|---|
| Anemometer | a weather instrument used to measure wind speed in miles per hour. |
| Barometer | a weather instrument used to measure air pressure in inches of mercury or millibars (mb). |
| Humidity | the amount of water vapor (moisture) in the air. |
| Isobar | a line of constant pressure on a weather map. |
| Isotherm | a line of constant temperature on a weather map. |
| Relative humidity | the amount of water vapor in the air as a percentage of the maximum amount of water vapor the air could hold at that temperature. |
| Meteorologist | a person who studies day-to-day weather. |
| Doppler radar | a device that is used to detect cloud cover, rainfall or storm location, intensity, and movement, as well as the potential for severe weather (for example, hurricanes or tornadoes). |
| Rain gauge | a weather instrument used to measure the amount of precipitation in inches or centimeters. |
| Sling psychrometer | a weather instrument used to measure relative humidity. |
| Station model | a combination of symbols that shows the weather conditions at a specific location on Earth’s surface. |
| Thermometer | an instrument used to measure temperature in degrees C or F. |
| Weather map | a diagram which shows information gathered from station models, satellites, and radar that is used to forecast weather. |
| Weather satellite | a device that orbits earth and is used to detect cloud patterns and movement; useful for detecting fronts and for tracking the movement of hurricanes. |
| Wind vane | a weather instrument used to measure wind direction. |
