Question

When warm air rises at a place, what happens to the air pressure there?

• A. Air pressure remains unaffected
• B. Air pressure increases
• C. Air pressure decreases
• D. Cannot be determined

Answer 1

Answer: (C)

Air pressure decreases

When hot air rises from an area, a region of space is left with no air hence air pressure decreases there due to less air molecules.So a region of low pressure is created.And cooler air from horizontal side flow here creating again high pressure region due to lot of air molecules.