What is the term for the mass movement of air?

• A. Humidity
• B. Pressure
• C. Wind
• D. Temperature

Answer: (C)

Wind is the bulk horizontal movement of air. It happens because air moves from regions of higher atmospheric pressure to lower pressure, creating a flow that we experience as wind. Temperature and humidity influence how strong or where winds occur by changing air density and stability, but they are not the movement itself. Pressure is the driving factor that creates wind, while humidity and temperature are properties of the air that affect how easily that movement happens. In short, wind describes the large-scale motion of air across the surface driven by pressure differences.