Movement of air caused by temperature differences is known as what?

• A. Weather
• B. Air circulation
• C. Precipitation
• D. Humidity

Answer: (B)

Air moves differently when parts of the atmosphere are warmer than others because warm air is lighter and tends to rise while cooler air sinks. This buoyancy-driven looping creates a continuous flow of air, which is known as air circulation. This concept explains how heat and moisture are redistributed in the atmosphere, driving winds and larger weather patterns. The other terms describe conditions or phenomena in the atmosphere rather than the process causing the movement: weather is the overall atmospheric state at a time, precipitation is the falling of water droplets, and humidity is the amount of water vapor in the air.