How many degrees below zero will water freeze?

Water will freeze when it condenses from liquid to solid below 0 degrees Celsius. Water, chemical formula h? O is an inorganic substance composed of hydrogen and oxygen, which is nontoxic and drinkable. At normal temperature and pressure, it is a colorless and odorless transparent liquid, which is called the source of human life. Water is one of the most common substances on earth. 72% of the earth's surface is covered with water. It is an important resource of all life, including inorganic compounds and human beings, and it is also the most important component of organisms.

Extended data

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. This largely refutes the view held by many scientists that "water was transformed from ice on the surface of meteorites during the formation of the earth". The origin and formation time of water on the earth determine the direction of the earth's evolution and the time of the origin of life. At present, the representative sources of water on the earth are "exogenous theory" and "endogenous theory".