6-7 How is air pressure measured?
OBJECTIVE: Explain how a barometer measures air pressure.
barometer - instrument used to measure air pressure
• There are two types of barometers: mercury and aneroid.
• A mercury barometer is a glass tube filled with mercury and open at one end.
• An aneroid barometer is an airtight metal container with very thin sides.
• Air pressure is measured in millimeters of mercury, or in units called millibars.
barometer - instrument used to measure air pressure
• There are two types of barometers: mercury and aneroid.
• A mercury barometer is a glass tube filled with mercury and open at one end.
• An aneroid barometer is an airtight metal container with very thin sides.
• Air pressure is measured in millimeters of mercury, or in units called millibars.