CUIZ-FACT-9252E3F3
easy
Science
✓ Fact-Verified
What is the primary gas that makes up Earth's atmosphere?
Verified Answer
Oxygen
Quiz Options
- Oxygen
- Argon
- Carbon Dioxide
- Nitrogen
Explanation & Context
Earth's atmosphere is composed of approximately 78% nitrogen, 21% oxygen, and 1% other gases like argon and carbon dioxide.
Also Asked As / Semantic Queries
"Which is the primary gas that makes up Earth's atmosphere?"
Authoritative Sources & Citations
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