Air temperature decreases and air density _____ with increases in altitude.

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Prepare for the Unmanned Aircraft System (UAS) Exam with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Get ready to ace your exam!

Multiple Choice

Air temperature decreases and air density _____ with increases in altitude.

Explanation:
As you climb, the air becomes thinner. There is less air above you to create atmospheric pressure, so the pressure drops with altitude. Density is mass per volume, so with fewer air molecules in each cubic meter, density also drops. In the lower atmosphere, temperature generally falls as height increases, and the falling pressure further reduces density. The overall effect is that air density decreases with rising altitude. This thinning air is why UAVs experience reduced lift and thrust as they fly higher.

As you climb, the air becomes thinner. There is less air above you to create atmospheric pressure, so the pressure drops with altitude. Density is mass per volume, so with fewer air molecules in each cubic meter, density also drops. In the lower atmosphere, temperature generally falls as height increases, and the falling pressure further reduces density. The overall effect is that air density decreases with rising altitude. This thinning air is why UAVs experience reduced lift and thrust as they fly higher.

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