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Which balanced idea is more correct for the origin of Earth's water?

Answer and explanation

Correct answer: Water may be linked with both outgassing and water rich outer bodies

Water vapour released from Earth’s interior through volcanic outgassing entered the early atmosphere and condensed as the planet cooled. Impacts by water-rich asteroids, and possibly some comets, may also have contributed water. Therefore, the option recognising both sources is the most balanced. Modern rivers redistribute water; they are not its original source. Exam tip: associate Earth’s early water with both outgassing and water-bearing bodies.

Related tags

Earth Water OriginOutgassingWater-Rich AsteroidsCometsEarly EarthSolar System FormationStar FormationFormation Of PlanetsAnd Our Solar SystemStar Formation Formation Of Planets And Our Solar System

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