Barometer readings must be corrected for the effect of elevation because
A)lower elevations are usually colder than higher elevations
B)the acceleration of gravity is smaller at higher latitudes
C)vertical pressure changes are much larger than horizontal pressure changes
D)vertical pressure changes are much smaller than horizontal pressure changes

Question

Quizplus · Accepted Answer

Vertical pressure changes are much larger than horizontal pressure changes, which is why barometer readings must be corrected for elevation to accurately measure atmospheric pressure. This is because the weight of the air above the measurement point decreases with altitude, leading to a decrease in pressure.

Barometer Readings Must Be Corrected for the Effect of Elevation