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Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It contains 21% carbon dioxide. It blocks all r…
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Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It contains 21% carbon dioxide. It blocks all r…
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Nov 2, 2019
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Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It contains 21% carbon dioxide. It blocks all radiation from the sun.
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The answer is 21% oxygen
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