Question

The air density ___ with the increase in altitude.

• A. increases
• B. decreases
• C. remains the same
• D. changes unpredictably

Answer 1

The correct option is B decreases

The density of air decreases with increasing altitude. As we go far from the Earth, the layers of air become thinner. The layers of air closest to the Earth are very close to each other and hence are thick. The layers of air at higher levels are not so close to each other and hence are thinner.