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2:4 Winds
Clouds
| Term | Definition |
|---|---|
| Evaporation | The process by which water molecules in liquid water escape into the air as water vapor. |
| Humidity | A measure of the amount of water vapor in the air. |
| Relative humidity | The percentage of water vapor in the air compared to the maximum amount the air could hold at that tempatures. |
| Psychrometer | An instrument used to measure relative humidity, consisting of a wet-bulb thermometer and a dry-bulb thermometer. |
| Condensation | The process by which molecules of water vapor in the air become liquid water. |
| Dew point | The temperature at which condensation begins. |
| Cumulus | Clouds that form less than 2 kilometers above the ground and look like fluffy, rounded piles of cotton. |
| Stratus | Clouds that form in flat layers. |
| Cirrus | Wispy, feathery clouds made mostly of ice crystals that form at high levels, above about 6 kilometers. |