Which of the following is a probable hypothesis for the origin of water on Earth?

Local origin of water on earth

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The Earth was a ball of water from the beginning

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Extra terrestrial origin of water on earth

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None of the above

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Solution

The correct option is C
Extra terrestrial origin of water on earth

Both comets and asteroids contain ice. Such bodies are suspected to have delivered oceans worth of water upon collision with the Earth. Some other scientists believe that carbonaceous meteoroids called chondrites hit the Earth and led to the origin of water. This hypothesis is called extra-terrestrial origin of water.

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