What Is Barometer?
An instrument that measures air pressure. Falling pressure often signals stormy weather is coming; rising pressure usually means clearing. In technical terms: An instrument for measuring atmospheric pressure, classically a mercury column (standard 760 mm or 29.92 in at sea level) or an aneroid capsule; modern stations use electronic transducers.
Barometer In Plain English
An instrument that measures air pressure. Falling pressure often signals stormy weather is coming; rising pressure usually means clearing.
The Technical Definition
An instrument for measuring atmospheric pressure, classically a mercury column (standard 760 mm or 29.92 in at sea level) or an aneroid capsule; modern stations use electronic transducers.
Lessons That Use Barometer
- Air Pressure And How We Measure It Unit 1: The Atmosphere
