Precipitation <br />Any form of water that falls from a cloud.<br />
Latent Heat <br />The energy absorbed or released during a change in state. <br />
Evaporation <br />The process of converting a liquid to a gas.<br />
Condensation <br />The change of state from a gas to a liquid.<br />
Sublimation <br />The conversion of a solid directly to a gas without passing through the liquid state.<br />
Deposition <br />The process by which an agent of erosion loses energy and drops the sediment it is carrying; also the process by which water vapor is changed directly to a solid without passing through the liquid state.<br />
Humidity <br />A general term referring to water vapor in the air but not to liquid droplets of fog, cloud, or rain.<br />
Saturated<br />The state of air that contains the maximum quantity of water vapor that it can hold at any given temperature and pressure.<br />
Relative Humidity <br />The ratio of the air’s water-vapor content to its water-vapor capacity.<br />
Dew Point <br />The temperature to which air has to be cooled in order to reach saturation.<br />
Hygrometer<br />An instrument designed to measure relative humidity.<br />
Key Concept<br />When it comes to understanding atmospheric processes, water vapor is the most important gas in the atmosphere.<br />
Key Concept <br />The process of changing state requires that energy is transferred in the form of heat.<br />
Key Concept<br />When saturated, warm air contains more water vapor than saturated cold air.<br />
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