AerodynamicsQuestion 414 of 934

Air pressure stays constant and the air temperature rises. What happens to the air density?

  1. It increases
  2. It decreases
  3. It stays the same
  4. It doubles
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Correct answer: It decreases

The density of air varies inversely with temperature, at constant pressure.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 4: Principles of Flight — Effect of Temperature on Density, page 91

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Questions last reviewed: 18 October 2026