Natural Science CLEP Prep Practice Exam

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Prepare for the Natural Science CLEP Exam with comprehensive quizzes and multiple choice questions. Each question includes hints and explanations to help you succeed. Ace your exam!

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Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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The atmosphere is composed of

  1. Nitrogen and carbon dioxide

  2. Oxygen and carbon dioxide

  3. Nitrogen and oxygen

  4. Carbon dioxide and water vapor

The correct answer is: Nitrogen and oxygen

The atmosphere is composed of primarily two gases, nitrogen and oxygen. While both carbon dioxide and water vapor are present in the atmosphere, they are relatively small amounts compared to nitrogen and oxygen. Therefore, options A, B, and D are incorrect as they do not comprise the majority of the atmosphere.

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