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Weather theoryQuestion 330 of 934

What is a temperature inversion?

  1. A layer where temperature rises with altitude
  2. A layer where temperature falls 3 °C per 1,000 feet
  3. A layer where temperature and dew point are equal
  4. A layer where pressure stays the same with height
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Correct answer: A layer where temperature rises with altitude

An inversion layer is usually shallow, smooth, and stable. The top acts like a lid on weather and pollutants.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 12: Weather Theory — Atmospheric Stability, page 297

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Questions last reviewed: 18 October 2026