warm air mass and cold air mass
Density.
what is a word for a place where a moving cold air mass meets a warmer air mass
another word for air sac is alveolus.
The line that seperates one air mass from another is called a boundary.
a front.
Another word for Earth's air is atmosphere.
Vapor is another word for gas that is not air.
Another word for the air around the earth is the atmosphere.
Mass
Another word for pneumatic pressure could be air pressure.
in the open air
The cold air mass from the north did not move away.