Solid water or ice consists of ordered molecules tightly bonded to one another. Liquid water consists of molecules that move relative to one another. Gaseous water or vapor is made up of independently moving molecules. H 2 O , water is a complex substance capable of coexisting naturally as a gas, a solid and a liquid on earth's surface. It has an unusually high heat capacity and tremendous solvent power .
Seawater consists of a small quantity of salt dissolved in water.
Also contained in minor amounts are an infinite variety of dissolved metals , nutrients , gases and organic compounds .