This measures wind speed.

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Multiple Choice

This measures wind speed.

Explanation:
Measuring wind speed is done with an instrument called an anemometer. Anemometers, often with cups or a rotating vane, respond to moving air: the wind pushes or spins the device, and the sensor converts that motion into a reading of how fast the air is traveling. This directly captures wind speed, which is different from other weather measurements. A barometer gauges atmospheric pressure, not wind speed; a thermometer measures temperature; and a psychrometer uses two thermometers to determine humidity. So the instrument designed to quantify how fast the air is moving is the anemometer.

Measuring wind speed is done with an instrument called an anemometer. Anemometers, often with cups or a rotating vane, respond to moving air: the wind pushes or spins the device, and the sensor converts that motion into a reading of how fast the air is traveling. This directly captures wind speed, which is different from other weather measurements. A barometer gauges atmospheric pressure, not wind speed; a thermometer measures temperature; and a psychrometer uses two thermometers to determine humidity. So the instrument designed to quantify how fast the air is moving is the anemometer.

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