1. A little cumulus cloud weighs about the same as 100 elephants, and a thunderstorm cloud can weigh as much as 200,000 elephants!
2. Each second, approximately 16 million tons of water evaporates from the surface of the Earth. This 16 million tons of water is the same amount in raindrops that falls back to earth each second. Water moves continuously in a balanced cycle based on its volume.
3. For every minute of every day, 1 billion tons of rain falls on the Earth. Rain plays a key role in the cycle of returning water back to our earth. So it is obvious that we need rain in order for the world to continue functioning. The technical name for rain is precipitation, and this also includes hail and snow.
4. Raindrops can fall at speeds of up 35km/h (around 22mph), but on average travel between 8-10 km/h, depending on wind speed, droplet size and the area it falls over.
5. Raindrops vary in size from 0.02 inches to about .031 inches diameter.
6. Rain starts off as ice or snow crystals at cloud level.
7. Rain drops do not fall in a tear drop shape. They originally fall in the shape of a flat oval.
8. Water generally falls to earth at a low speed, this is because raindrops have a special shape that increases the effects of atmospheric friction and helps the rain come down to earth at a lower velocity. Imagine if we didn’t have friction acting on the falling rain, or that the shape that rain forms was different. Each drop would come crashing down to earth at great speeds and cause a lot of damage.
9. Light rain is classified as being no more then 0.10 inches (2.54mm) of rain an hour. Heavy rain is classified as being more then 0.30 inches (7.61mm) of rain an hour.
10. Rain is recycled water that evaporated from our world’s lakes, rivers, oceans, seas etc. So More we pollute we are changing the chemical composition of the rain water.