Question

which statement best describes air pressure at high altitudes? air pressure increases as altitude increases. air pressure decreases as altitude increases. air pressure does not change as altitude increases. it is impossible to accurately measure air pressure at high altitudes.

Explanation:

At higher altitudes, there are fewer air molecules pressing down from above. This leads to a reduction in air pressure as altitude rises. The other options are incorrect: air pressure does not increase or stay the same with altitude, and air pressure at high altitudes can be accurately measured with tools like barometers.

Answer:

Air pressure decreases as altitude increases.