Composition of Atmosphere MCQs with Answers

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The most abundant gas in the earth's atmosphere by volume is Nitrogen, which makes up about 78% of the atmosphere.

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Nitrogen makes up approximately 78% of Earth's atmosphere by volume.

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Neon is the gas present in the Earth's atmosphere at about 0.009% (or roughly 18 parts per million by volume).

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Besides gases, the atmosphere also contains water vapour, dust particles, and smoke particles — All of these.

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The primary component of air in Earth's atmosphere is Nitrogen, which makes up about 78% of the atmosphere by volume.

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Xenon is the noble gas present in the smallest amount in Earth's atmosphere, at only about 0.0000087% by volume.

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Noble gases, primarily argon, make up about 0.9% of the Earth's atmosphere.

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Helium, krypton, and xenon together make up only 0.00055% of the Earth's atmosphere.

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Nitrogen makes up approximately 78% of Earth's atmosphere by volume.

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Air contains varying amounts of dust particles, water vapours, and smoke, so the correct answer is All of these.