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Oceans? Answered

if the earth is made of by a lot of dust collecting in space due to gravity how did water form on earth?

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steveastrouk
steveastrouk

11 years ago

Comets seem to contain a lot of water ice - it looks like there is good evidence from isotope ratio measurements that cometary water is the likely source of most of earth's water.

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MagicLantern
MagicLantern

11 years ago

Water is a molecule made from two Hydrogen and one Oxygen atoms. Hydrogen happens to be the most abundant element throughout the universe. Hydrogen (and Oxygen) would have coalesced along with the dust you mentioned to form the Earth. A small amount of energy provided by the Sun or lightning would cause these two elements to combine into water.