Weather and Atmosphere Terms

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Atmosphere

Back

The layer of gases surrounding the Earth.

Front

Air pressure

Back

The force exerted onto a surface by the weight of the air above that surface in the atmosphere.

Front

Altitude

Back

The height of an object or point in relation to sea level or ground level.

Front

Wind

Back

The movement of air, especially in the atmosphere.

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Water cycle

Back

The continuous process by which water moves from the Earth's surface to the atmosphere and back.

Front

Evaporation

Back

The process by which water changes from a liquid to a gas or vapor.

Front

Condensation

Back

The process by which water vapor in the air is changed into liquid water.

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Dew point

Back

The temperature at which air becomes saturated with moisture and water vapor begins to condense.

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Humidity

Back

The amount of water vapor present in the air.

Front

Relative humidity

Back

The amount of moisture in the air compared to the maximum amount of moisture the air can hold at that temperature.