Water may it be in the form of solids(ice) or liquid(water) that falls from a cloud is called precipitation. Types of precipitation include rain, drizzle, sleet, snow and hail. Factors that determine the type of precipitation that falls include conditions within a cloud, temperature outside it and the height of the cloud.
Rain is precipitation that reaches the ground in liquid form. Raindrops that fall closely together is defined as drizzle and if they fall far apart, rain.
Snow is precipitation that is in the form of ice crystals. It usually occurs when the temperature is around 0 °C.
Hail is precipitation in the form of frozen lumps. These frozen lumps are produced by thunderstorms.