Answer:
Barometer is used to measure air pressure.
Explanation:
Barometer :
Barometer used to measure the air pressure.
It is the scientific device which is used to measure the atmospheric pressure.
Atmospheric pressure change with the distance above and below the sea level.
When the air pressure is greater, then the mercury rises the higher.
Air pressure :
The weight of the air molecules pressing down on the earth it is called air pressure.
The density of air molecules is higher at sea level where the air pressure will be higher.
