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:
“All water has a perfect memory and is forever trying to get back to where it was.”
—Toni Morrison (b. 1931)
“Rock of ages, cleft for me,
Let me hide myself in Thee!
Let the Water and the Blood,
From thy riven Side which flow’d,
Be of sin the double cure;
Cleanse me from its guilt and pow’r.”
—Augustus Montague Toplady (1740–1778)
“By constant dripping, water hollows stone,
A signet-ring from use alone grows thin,
And the curved plowshare by soft earth is worn.”
—Ovid (Publius Ovidius Naso)