Second Grade Snow is a form of moisture that falls over the earth. Rain is water that falls and drops from the sky. Hail is rain that falls as lumps of ice.
Hailstones form in thunder clouds.
If it is very cold, rain freezes. Then sleet may fall. A thunderstorm is a rainstorm with both lightning and thunder. Thunderstorms begin in cumulus clouds. Winds shake the moist air and raindrops fall.