yes the softball is heaver bc of the bigger it is. now i don't think a softball is heaver of air mass. but yes a softball is heaver!
The word airmass is a singular noun. The plural is airmasses.
Air does not remain in a given place. A country does not have an 'airmass'.
it become a storm
The warmer airmass that was coming would mark a positive change in the weather.
An airmass that is very warm and dry would be very light and have a tendency to rise up.
Compared to a maritime tropical airmass, a maritime polar airmass has lower temperature and less water vapor.
It is cold and dry.
It affects the temperature and Humidity of a climate...(marintime airmass is develping and being moved with winds that carry water vapor and are being deposited over the continental airmass)
An airmass source region is an extensive area of the earth's surface over which bodies of air remain for a sufficient time to acquire characteristic temperature and moisture properties imparted by that surface.
"The air mass moved north over the Pacific"
airmass
airmass