Barometers measure what?

Barometers measure what?

• A. Air pressure
• B. Temperature
• C. Humidity
• D. Wind speed

Answer: (A)

Barometers measure atmospheric pressure—the weight of the air pressing down on the Earth. This pressure changes as weather systems move in, so watching whether it rises or falls helps forecast conditions: rising pressure often means improving weather, while falling pressure can signal storms or rain. Temperature is read with thermometers, humidity with hygrometers, and wind speed with anemometers, so those options don’t fit what a barometer does.

Barometers measure atmospheric pressure—the weight of the air pressing down on the Earth. This pressure changes as weather systems move in, so watching whether it rises or falls helps forecast conditions: rising pressure often means improving weather, while falling pressure can signal storms or rain. Temperature is read with thermometers, humidity with hygrometers, and wind speed with anemometers, so those options don’t fit what a barometer does.