Multiple choice general knowledge science & technology

The atmosphere on Mars is 95 percent:

  1. nitrogen

  2. hydrogen

  3. carbon dioxide

  4. oxygen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mars's atmosphere is composed of about 95% carbon dioxide, 2.7% nitrogen, 1.6% argon, and only trace amounts of oxygen. This composition is quite different from Earth's nitrogen-rich atmosphere and contributes to Mars's inability to retain heat or support liquid water on its surface.

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