Certified Energy Auditor Practice Exam

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What does a barometer measure?

Pressure
Humidity
Temperature
Wind speed

The correct answer is: Pressure

A barometer measures atmospheric pressure. This tool is essential in meteorology and helps predict weather changes; for example, rising pressure typically indicates good weather, while falling pressure may signify that a storm is approaching. The functioning of a barometer is based on the principles of air pressure, which vary with altitude and weather patterns. Humidity refers to the amount of moisture in the air, which is measured using a hygrometer, not a barometer. Temperature is measured with a thermometer, which indicates how hot or cold something is. Wind speed, on the other hand, is measured with an anemometer. Each of these instruments serves a distinct purpose in meteorological studies, highlighting why the barometer specifically pertains to atmospheric pressure.