Water

Water Water is found all over the earth. In fact, about seven-tenths of the earth's surface is water! All living things need water. Your body is about two-thirds water. Ancient peoples thought water was an element, but it is not. Water is a compound of the elements hydrogen and oxygen. Both of these elements are gases at ordinary earth temperatures. In 1784, Henry Cavendish fund that hydrogen combined with oxygen to produce water. a few years …

…is 100 C (212 F). The boiling point is the temperature at which a substance changes into a gas. Nearly all other substances dissolve in liquid water this is very important to living things. Food and gases travel to and from a living thing's cells in water. Water is used in countless ways. Industry relies on water for all kinds of chemical processes. Water is used for cleaning, cooling, producing electric power, and for transportation and recreation.