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Which instrument measures air pressure?

Answer and explanation

Correct answer: Barometer

Air pressure is the force exerted by the weight of air on a surface. It changes from place to place and from time to time, and these differences influence wind and weather. A barometer is the scientific instrument used to measure air pressure. It may be a liquid-based instrument, such as a mercury barometer, or an aneroid instrument without liquid. The measurement helps weather observers study approaching changes, because falling or rising pressure can be associated with changing weather conditions.

Option B is correct because a barometer measures atmospheric or air pressure. Option A, the rain gauge, measures the amount of rainfall. Option C, the thermometer, measures temperature. Option D, a clock, measures time. The names are easy to confuse, so the useful pairing is pressure with barometer, rainfall with rain gauge, and temperature with thermometer. This direct matching leads to the correct choice without any calculation.

Related tags

BarometerAir PressureInstrument

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