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Earth Structure MCQs

Practice important Earth Structure MCQs with answers, explanations, theory links, and exam-focused preparation.

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Earth Structure

Earth Structure MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Earth Structure
Which gas is most abundant in Earth's atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Correct Answer: B
B: Correct because nitrogen makes up the largest share of Earth's atmosphere. A: Wrong because oxygen is second-most abundant. C: Wrong because carbon dioxide is present in small concentration. D: Wrong because hydrogen is only a trace gas.
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