What are some similarities between Mars and Earth's atmospheres?

Answer 1

Mars has a very thin atmosphere that is made mostly of carbon dioxide.

• 95.72% CO2
• 2.7% nitrogen
• 1.6% argon
• 0.2% oxygen
• 0.07% carbon monoxide
• 0.03% water vapour
• 0.01% nitric oxide
• and trace amounts of neon, krypton, formaldehyde, xenon, ozone, and methane.

Its atmospheric pressure is 7-9 millibars, depending on the season. This is only about 1/100th as dense as Earth's at sea level (1013.25 millibars).

The average temperature is about -80 degrees C.

During winter some of the atmosphere freezes into dry ice at the poles.

Answer 2

They are very different in percent composition and in pressure, however, the gases are similar, if in different quantities. Earth's atmosphere is about 78% nitrogen, almost 21% oxygen, about 1% argon, with trace amounts of carbon dioxide, water vapor, and other gases. Mars's is 95% carbon dioxide, 3% nitrogen, and has traces of argon, oxygen, water vapor, and other gases.

The atmospheres, however, have similar weather phenomenon. Both Earth and Mars have clounds and frost. Snow (which doesn't reach the ground) even has been observed on Mars. Earth, Mars, and Venus also have cyclones, though in the last two these occur only near the poles. Mars is particularly famous for its planet wide dust storms, which dwarf Earhtly dust storms. Both Earth and Mars have dust devils, and wind is a major contributor to erosion and the formation of sand dunes.

Answer 3

Mars is the fourth planet from the sun and like the moon is made up of craters. Mars has a small man-made robot called the mars rover that has a camera and moves slowly across the surface.