Cold air masses have molecules that are densely packed and close together, unlike warm air.
the hot and dry air mass are most likely to rise
heat rises
hot air rises.
Hot air rises and cools as it does so.
Hot air rises. As the air in the hot air balloon is made hotter than the surrounding air it rises.
hot air rises
Hot air rises
hot
hot air rises
Hot air rises.
Hot air. Because it always rises above cold
If a cool air mass comes in on a hot day, and if there is enough moisture, you can generally expect showers and thunderstorms.