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Weather
The condition of Earth's atmosphere at a particular time and place.
Climate
The average weather conditions in an area over a long period of time
air mass
A huge body of air that has similar temperature, humidity, and air pressure at any given height
Warm Front
the front of an advancing mass of warmer air
Cold Front
A front where cold air moves in under a warm air mass.
Stationary Front
A boundary between air masses that don't move possibly causing rain for several days
Occluded Front
a front where a warm air mass is caught between two colder air masses and brings cool temperatures and large amounts of rain and snow
Isobars
Lines joining places on the map that have the same air pressure
humidity
a measure of the amount of water vapor in the air
Thunderstorm
a usually brief, heavy storm that consists of rain, strong winds, lightning, and thunder
Barometer
an instrument used to measure atmospheric pressure
Anemometer
An instrument used to measure wind speed
relative humidity
The amount of water vapor in the air at any given time is usually less than that required to saturate the air. Expressed as a percentage.
Dew Point
temperature at which air is saturated and condensation forms
Note 
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