Ko te pūhui o te hauwai (H) me te hāora (O). Noho ai te wai hei totoka (te kōpaka), hei wē (te wai tai me te wai māori), hei haurehu rānei (te wairehu). Ko te wai tētahi mea matua e ora ai ngā rauropi katoa o Papatūānuku, tipu mai, kīrehe mai, huakita mai. E kapi ana te 70% o te mata o Papatūānuku i te wai, waihoki he nōhanga te wai mō ngā rauropi huhua. Ko te wai anō hoki tētahi matū matua e noho ana ki roto i ngā rauropi, hei tauira, kei te takiwā o te 65% o te tinana tangata he wai. Ko te 0° te pae rewa o te wai, ko te 100° te pae koropupū.
A compound of hydrogen and oxygen. Water exists as a solid (ice), a liquid (salt water, fresh water) or a gas (water vapour). It is essential to the life of all organisms on the Earth, including plants, animals and bacteria. About 70% of the Earth’s surface is covered with water, and provides a habitat for a large number of organisms. Water is also a major substance within an organism, for example, the human body is made up of about 65% water. The melting point of water is 0°, and the boiling point is 100°.