alleryStart learning →Atmospheric pressure decreases with altitude because
ADensity of air rises with altitude
BLess air sits above as one goes higher
CTemperature drops sharply with altitude
DGravity is much stronger at higher altitudes
Answer & Solution
Correct answer: B. Less air sits above as one goes higher
1. Atmospheric pressure at a point equals the weight of air above.
2. Higher up, there is less air column above.
3. So pressure falls with altitude.
4. Hence option A is correct.
_Source: Selina Concise Physics Class 9, Ch 4 Pressure in Fluids and Atmospheric Pressure (Mistral OCR'd PDF), section on variation with altitude_
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