GED Science : Atmosphere and Air

Study concepts, example questions & explanations for GED Science

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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:

Carbon dioxide




Correct answer:



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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