There are four main types of precipitation: rain, which falls when warm; sleet, which forms when raindrops freeze into ice pellets before falling; snow, which forms when water vapor condenses into ice crystals due to cold air; and hail, which forms when raindrops are pushed high into the atmosphere and freeze. Rainfall has been measured for thousands of years using a rain gauge, which is important for farmers to know rainfall amounts for the year.

1. Types of precipitation
1)Rain
It falls when the temperature is warm .

2. 2) Sleet
• Forms when raindrops freeze and turn into
pellets of ice before falling to earth’s surface.

3. Snow
• It falls when the air becomes cold that water vapor becomes
solid rather than condensing into droplets

4. Hail stones
• As wind pushes raindrops high into the
atmosphere where they turn into ice.

5. Measuring amount of rainfall
• People have measured rainfall for thousands of
years.
• It is especially important for farmers to know how
much rain will fall this year.
• The instrument used to measure rain fall is called
“Rain Gauge”