Read about "Boyles law"
http://www.grc.NASA.gov/WWW/K-12/airplane/aboyle.html
As temperature increases the volume OR the pressure of a mass of air will increase. If the volume of the air mass is constrained (inside a container of fixed size) the pressure will go up. If the mass of air is allowed to expand freely it will become less dense (lighter per unit volume)
As the air gets warmer, it's ability to hold water vapor increases.
As the air gets warmer, it's ability to hold water vapor increases.
it gets warmer
As the air gets warmer, it's ability to hold water vapor increases.
As the air gets warmer, it's ability to hold water vapor increases.
it gets warmer
it gets warmer
Snowflakes are larger when the temperature is warmer because warmer air has more moisture, resulting in water droplets that can come together and form bigger snowflakes. Warmer temperatures can also lead to higher humidity, which can enhance the growth of snowflakes as they fall through the atmosphere.
it evaporates
it gets warmer as it rises
it gets warmer as it rises
it gets warmer as it rises