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What is a barometer used for?

Answer and explanation

Correct answer: To measure air pressure

A barometer is an instrument used to measure atmospheric pressure, which is the force exerted by the weight of the air. Pressure readings can help describe changes in the atmosphere and are useful in weather observation. A falling or rising pressure pattern may be associated with changing weather, although the instrument itself measures pressure, not wind or rainfall.

Option C is correct because a barometer specifically measures air pressure. Rainfall is measured with a rain gauge, temperature with a thermometer, and wind direction with a wind vane. Remembering the instrument’s direct function prevents confusion: the barometer does not measure every element of weather. Its main quantity is atmospheric pressure, usually recorded in units such as hectopascals or millibars.

Related tags

BarometerAir PressureInstrument

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