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2015-03-13T21:38:40+05:30

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Ans. Although Mars has an atmosphere, it is very different from the Earth. Mars is smaller than Earth in diameter. This results in lower force of gravity — only about one- third of the gravity of Earth and a thin atmosphere with a pressure of 1% that of the Earth. The Martian atmosphere is mainly composed of carbon dioxide (95.3%), nitrogen (2.7%) and argon (1.6%). There is only a small amount of oxygen (0.13%) and water vapour (0.03%). In comparison, Earth atmosphere has 77% nitrogen, 21% oxygen, 1% argon, 0.038% carbon dioxide and 1.0% water vapour. Further, due to such a vast difference in atmosphere, the surface temperature of the Mars is about –63°C whereas that of Earth is 14°C.
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2015-03-13T21:42:04+05:30

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Earth has a gud environment for humans and animals. U can breathe the atmosphere. Reasonable temperature. Earth is protected by a thick atmosphere and magnetic field from solar radiation. Mars has a deadly environment for both humans and animals. Hardly any atmosphere to breathe. Too cold @night.
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