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:
“We’ve only just begun to learn about the water and its secrets, just as we’ve only touched on outer space. We don’t entirely rule out the possibility that there might be some form of life on another planet. Then why not some entirely different form of life in a world we already know is inhabited by millions of living creatures?”
—Harry Essex (b. 1910)
“Aesop, that great man, saw his master making water as he walked. “What!” he said, “Must we void ourselves as we run?” Use our time as best we may, yet a great part of it will still be idly and ill spent.”
—Michel de Montaigne (1533–1592)
“We were uncertain whether the water floated the land, or the land held the water in its bosom. It was such a season, in short, as that in which one of our Concord poets sailed on its stream, and sung its quiet glories.”
—Henry David Thoreau (1817–1862)