Which correctly lists the three gases that each make up less than 1 percent of Earth’s atmosphere. A. Argon, water vapor, carbon dioxide
B. Oxygen, argon, water vapor
C. Nitrogen, oxygen, carbon dioxide
D. Carbon dioxide, oxygen, argon?
Which correctly lists the three gases that each make up less than 1 percent of Earth’s atmosphere?
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The correct answer is A. Argon, water vapor, carbon dioxide.
Explanation: Earth’s atmosphere is composed mainly of nitrogen (about 78%) and oxygen (about 21%), with argon, water vapor, carbon dioxide, and other gases making up the remaining less than 1%. Specifically, argon is approximately 0.93% of the atmosphere, water vapor varies (but typically is around 0-4%), and carbon dioxide is about 0.04%. Choices B, C, and D include gases that make up more significant portions of the atmosphere, so A is the only correct option.