Question

composition of mars atmosphere???????

Answer 1

The atmosphere of the planet Mars is composed mostly of carbon dioxide. The atmospheric pressure on the Martian surface averages 600 pascals (0.087 psi; 6.0 mbar), about 0.6% of Earth's mean sea level pressure of 101.3 kilopascals (14.69 psi; 1.013 bar). It ranges from a low of 30 pascals (0.0044 psi; 0.30 mbar) on Olympus Mons's peak to over 1,155 pascals (0.1675 psi; 11.55 mbar) in the depths of Hellas Planitia. This pressure is well below the Armstrong limit for the unprotected human body. Mars's atmospheric mass of 25 teratonnescompares to Earth's 5148 teratonnes; Mars has a scale height of 11.1 kilometres (6.9 mi)[2]versus Earth's 8.5 kilometres (5.3 mi).[3]

Answer 2

The atmosphere of Mars is about 100 times thinner than Earth's, and it is 95 percent carbon dioxide. Here's a breakdown of its composition, according to a NASA fact sheet:

Carbon dioxide: 95.32 percent

Nitrogen: 2.7 percent

Argon: 1.6 percent

Oxygen: 0.13 percent

Carbon monoxide: 0.08 percent

Also, minor amounts of: water, nitrogen oxide, neon, hydrogen-deuterium-oxygen, krypton and xenon

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