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Example Questions
Example Question #1 : Atmosphere And Air
What is the most prevalent gas in the earth's atmosphere?
Possible Answers:
Hydrogen
Carbon dioxide
Nitrogen
Oxygen
Correct answer:
Nitrogen
Explanation:
The air in the atmosphere is largely composed of nitrogen and oxygen. Nitrogen represents the largest contributor, composing approximately 79% of the earth's atmosphere. Oxygen represents about 20% of the earth's atmosphere. Other gases, such as hydrogen, carbon dioxide, and methane, comprise less than 1% of the atmosphere.
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