What is a barometer?


What is a barometer?

Atmospheric Pressure:

Atmospheric pressure is the weight of the air pressing down on the surface of the Earth. More precisely, it is the pressure of that air on the surface. As altitude increases, atmospheric pressure decreases simply because the layer of air on top of the surface of the Earth is thinner and contains fewer molecules of air.

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A barometer is a scientific device that measures air pressure.

The first barometer was invented by Evangelista Torricelli in 1644 after observing the...

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Barometric Pressure, Measuring Atmospheric Pressure & Barometers


Chapter 5 / Lesson 9

What is atmospheric pressure? Learn the definition of atmospheric, or barometric, pressure and how to distinguish between high and normal barometric pressure at sea level and higher elevations.

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