Rain is a form of precipitation of water droplets that are greater than 0.5 mm in diameter. The amount of precipitation that falls all over the world may range from less than 0.1 inches per year in some deserts to more than 900 inches per year in the tropics. It is estimated that every minute one billion tons (907 million tons) of water fall when it rains on the earth.
What amount of rain falls on the earth in one minute?
