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Chapter 3
McGraw Hill Lesson 1 Describing Weather
| Term | Definition |
|---|---|
| weather | the atmospheric conditions, along with short-term changes, of a certain place at a certain time. |
| humidity | the amount of water vapor in the air |
| dew point | the temperature at which air is saturated and condensation can occur |
| air pressure | the force that a column of air applies on the air or a surface below it |
| relative humidity | the amount of water vapor present in the air compared to the maximum amount of water vapor the air could contain at that temperature |
| precipitation | occurs when cloud droplets combine and become large enough to fall back to Earth's surface (liquid - rain; solid - snow, sleet, and hail) |
| variable | characteristic or factor that can change or vary in amount or type |
| meteorologist | a scientist who studies the atmosphere, including weather and climate, and uses that knowledge to forecast weather patterns |
| hygrometer | an instrument used to measure the humidity of the atmosphere |
| barometer | a scientific instrument used to measure atmospheric pressure |
| anemometer | a device used to measure the speed and sometimes the direction of the wind. |
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