a mixture of gases that surrounds Earth
the process by which a gas changes to a liquid
a collection of tiny droplets or ice crystals that hangs in the air
a large body of air with similar properties all through it
a boundary between air masses with different temperatures
the average weather conditions in an area over a long period of time
a measure of how hot or cold something is
the amount of water vapor in the air
The force of air against earth's surface
An instrument used to measure temperature
an instrument used to measure air pressure
a tool that shows the direction from which the wind is blowing
the process by which a liquid changes into a gas
water in the form of a gas
to change state from a liquid to a solid
The falling to earth of any form of water (rain or snow or hail or sleet or mist)
the continuous movement of water between Earth's surface and the air, changing from liquid to gas to liquid
to change state from a solid to a liquid
a boundary between air masses that allows a warm air mass to slide up and over a cold air mass
the boundary where a cold air mass moves under a warm air mass
a boundary between air masses that are not moving
A prediction of what the weather will be like in the future
the directed flow of a gas or liquid
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