Multiple choice general knowledge science & technology

Which planet is the only one to possess a mostly nitrogen atmosphere?

  1. Saturn

  2. Earth

  3. Venus

  4. Mars
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earth is the only planet with a predominantly nitrogen atmosphere, with nitrogen making up about 78% of the atmosphere. While other planets like Titan (Saturn's moon) also have nitrogen-rich atmospheres, among the planets themselves, Earth is unique in this regard. The nitrogen comes from outgassing and biological processes.

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