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Question

If we go by some of the proposed hypothesis then some extra - terrestrial body was responsible for the origin of water on the Earth. Which of the following would have been responsible for this?


  1. Other Planets

  2. Comets

  3. Asteroids

  4. Meteorites


Solution

The correct options are
B

Comets


C

Asteroids


D

Meteorites


In one, water-rich asteroids and meteorites impacted the infant Earth, distributing water across the planet by brute force. A more recent theory suggests that water molecules actually adhered to the surfaces of the interstellar dust grains that accreted to form the solar system. In that case, water accumulated simultaneously with the rest of the planet. And last, but not least, there are the comets.

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