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  • Goldilocks Conditions, Habitable Zone, and the Greenhouse Effect
  • The main element in the Earth's atmosphere is ____________.
Multiple choice

The main element in the Earth's atmosphere is ____________.

  1. carbon dioxide

  2. oxygen

  3. nitrogen

  4. water

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Earth's atmosphere is approximately 78 percent nitrogen, making it the most abundant gas.

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