Water

Water

Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at temperatures above 0 °C (273.15 K, 32 °F) at sea level, but it often co-exists on Earth with its solid state, ice, and gaseous state (water vapor or steam). Water also exists in a liquid crystal state near hydrophilic surfaces.

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Famous quotes containing the word water:

    For months it hasn’t known the taste of steel
    Washed down with rusty water in a tin.
    But standing outdoors hungry, in the cold,
    Except in towns at night, is not a sin.
    Robert Frost (1874–1963)

    The history of persecution is a history of endeavors to cheat nature, to make water run up hill, to twist a rope of sand.
    Ralph Waldo Emerson (1803–1882)