Which instrument measures wind speed?

Which instrument measures wind speed?

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

Answer: (A)

Measuring wind speed requires a device that responds directly to how fast air is moving. An anemometer does this with rotating cups or a small propeller that spins when wind blows. The wind’s strength is shown by how fast these cups or the propeller turn, typically giving wind speed in units like meters per second or miles per hour. Other instruments measure different properties—thermometers sense temperature, barometers measure air pressure, and hygrometers measure humidity—so they don’t gauge how fast the air is moving.

Measuring wind speed requires a device that responds directly to how fast air is moving. An anemometer does this with rotating cups or a small propeller that spins when wind blows. The wind’s strength is shown by how fast these cups or the propeller turn, typically giving wind speed in units like meters per second or miles per hour. Other instruments measure different properties—thermometers sense temperature, barometers measure air pressure, and hygrometers measure humidity—so they don’t gauge how fast the air is moving.