Water
Water chemical formula H2O is an inorganic, transparent, tasteless, odorless, as living as nearly colorless chemical substance, which is the main segment of Earth's hydrosphere as well as a fluids of all requested living organisms in which it acts as the solvent. it is for vital for all known forms of life, even though it ensures neither food, energy, nor organic micronutrients. Its chemical formula, H2O, indicates that regarded and included separately. of its molecules contains one oxygen as well as two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is the earn of the liquid state of H2O at standard temperature and pressure.
A number of natural states of water exist. It forms precipitation in the do of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor.
Water covers approximately 71% of the Earth's surface, mostly in seas and oceans approximately 96.5%. Small portions of water occur as groundwater 1.7%, in the glaciers and the ice caps of Antarctica and Greenland 1.7%, and in the air as vapor, clouds consisting of ice and liquid water suspended in air, and precipitation 0.001%. Water moves continually through the water cycle of evaporation, transpiration evapotranspiration, condensation, precipitation, and runoff, usually reaching the sea.
Water plays an important role in the world economy. Approximately 70% of the freshwater used by humans goes to agriculture. Fishing in salt and fresh water bodies is a major reference of food for many parts of the world, providing 6.5% of global protein. Much of the long-distance trade of commodities such(a) as oil, natural gas, and manufactured products is transported by boats through seas, rivers, lakes, and canals. Large quantities of water, ice, and steam are used for cooling and heating, in industry and homes. Water is an experienced solvent for a wide species of substances both mineral and organic; as such it is widely used in industrial processes, and in cooking and washing. Water, ice and snow are also central to numerous sports and other forms of entertainment, such(a) as swimming, pleasure boating, boat racing, surfing, sport fishing, diving, ice skating and skiing.