| Term | Definition |
|---|
| water cycle | movement of water between the atmosphere and the Earth's surface |
| evaporation | process by which water molecules in liquid water escape into the air as water vapor |
| humidity | measure of the amount of water vapor in the air |
| relative humidity | percentage of water vapor that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temperature |
| psychrometer | instrument used to measure relative humidity |
| condensation | process by which molecules of water vapor in the air become liquid water |
| dew point | the temperature at which condensation begins |
| cirrus | wispy, feathery clouds made of ice crystals that form at high levels |
| cumulus | fluffy, white clouds, usually with flat bottoms, that look rounded piles of cotton |
| stratus | clouds that form in flat layers and ofter cover much of the sky |
| thermometer | A psychrometer is made up of two of these, a wet-bulb and a dry-bulb. |
| cloud | What forms when water vapor in the air condenses to form liquid water or ice crystals? |
| condensation | Both cooling of the air AND the presence of particles in the air are required for what to occur? |
| frost | ice that has been depositied on a surface that is below freezing |
| dew | liquid water that condenses from the air onto a cooler surface |
| cirrus | comes from a word that meaning a curl of hair |
| cumulus | means "heap" or "mass" in Latin |
| stratus | means "spread out" |
| fog | clouds that form at or near the ground |
| nimbus | suffix that means "rain" |
| alto | prefix that means "high" |
Combine with other sets
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