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STUPID
7
Science
7th Grade
10/14/2008

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Term
Evaporation
Definition
the process by which a liquid changes to a gas.
Term
Condesation
Definition
 the process by which a gas such as water vapor turns into a liquid.
Term
Precipitation
Definition
Any type of solid or liquid water that falls to the Earth's surface.
Term
Saturation
Definition
a condition in which the rate of evaporation and condensation are equal. This means that the amount of water that is evaporating matches the amount of water that is condensing. So no more water can evaporate into the air without preciptation occuring.
Term
Dew Point
Definition
the temperature at which air with a given amount of water vapor will reach saturation.  In other words, this is the temperature in which condensation will occur!
Term
Humidity
Definition
The amount of water vapor in the air. When the air is very humid it sometimes feels very uncomfortable outside. Sometimes you hear people say the air is so thick you can cut it with a knife. The air can feel this way in the summer by the seashore.
Term
Relative Humidity
Definition
 this is a percent that compares the amount of water vapor in the air with the maximun of water vapor the air can hold at a certain temperature.  ( relative means in comparison to something else) If the amount of water vapor stays the same, the relative humidity would be higher for cold air compared to warm air because warm air can hold nmore water than cold air.
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