Which instrument measures atmospheric pressure?

Which instrument measures atmospheric pressure?

• A. Hygrometer
• B. Barometer
• C. Thermometer
• D. Anemometer

Answer: (B)

Measuring atmospheric pressure is the idea here. A barometer is used to measure the air pressure in the atmosphere, the weight of the air pressing on the Earth’s surface. This pressure reading helps with weather prediction, since changes in pressure relate to approaching weather systems. Barometers can be mercury-based or aneroid, and they show pressure in units like millibars or inches of mercury. The other instruments measure different properties: a hygrometer gauges humidity, a thermometer measures temperature, and an anemometer measures wind speed. Because only a barometer is designed to quantify atmospheric pressure, it is the correct instrument for this purpose.

Measuring atmospheric pressure is the idea here. A barometer is used to measure the air pressure in the atmosphere, the weight of the air pressing on the Earth’s surface. This pressure reading helps with weather prediction, since changes in pressure relate to approaching weather systems. Barometers can be mercury-based or aneroid, and they show pressure in units like millibars or inches of mercury. The other instruments measure different properties: a hygrometer gauges humidity, a thermometer measures temperature, and an anemometer measures wind speed. Because only a barometer is designed to quantify atmospheric pressure, it is the correct instrument for this purpose.