What causes the different types of snow?
Snow is formed from minute fragments of frozen vapor, and billions by these icy particles gather together to form a single snowflake. We all have heard that the design of each snowflake is unique. And it also seems that the quality of snow in every snowfall is unique. The snow may fall like great pompom balls of fluffy white cotton. It may sift down in small lacy flakes, and sometimes the ground is crusted with granular snow made of solid white pellets. If you examine it closely, every snowfall appears to bring snowflakes of a different kind. This is because the weather conditions, the air above the Earth, are always changing and are perhaps never quite the same. Hail is formed from frozen liquid, and many people suppose that snow also forms from rain, cloud droplets or other liquid moisture in the air. But this is not so. Snow forms from water vapor, a gas made of separate molecules. A Certain amount of vapor is present even in the driest desert air. But even in air saturated with vap
