Generally speaking, 1 ml of water is 20 to 25 drops, so a drop of water is 0.04 to 0.05 ml.

Drop about 0.05ml with a common dropper and about 0.04ml with a burette.

The size of water droplets is different, because different diameters, different water quality, different tension, temperature effects and other reasons will cause different sizes of water droplets. The water drop from a dropper in the laboratory is about 20 drops in 1 ml, which is converted into about 50 mg per drop.

The origin of water

There are many different understandings about the source of water on the earth, each with its own reasons, but the truth has yet to be collected by scientists to uncover this mystery. As we all know, 72% of the earth's surface is covered with water. However, where the water on the earth comes from is always an unsolved mystery.

According to an article in Nature, scientists from the University of Mü nster, Germany, analyzed the isotopes of meteorites and mantle rocks in Lake Tagesh, British Columbia, Canada, and showed that water appeared on the earth much later than previously expected.