Anemometer measures wind speed. Which of the following instruments measures wind speed?

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

Answer: (C)

Knowing what each instrument measures helps identify which one records wind speed. An anemometer is designed to quantify how fast air is moving past a point, using spinning cups, a rotating vane, or a hot-wire element to convert wind motion into a speed reading. A barometer measures atmospheric pressure, a hygrometer tracks humidity, and a thermometer measures temperature. Therefore, the instrument that directly measures wind speed is the anemometer.