Why Does Wind Blow?
The earth is not a stationary object. It moves around the sun in a circular motion, and also spins around its own axis like a big spinning top. As it spins, each part of the earth faces the sun turn by turn. The sun’s light warms the earth. Heat makes the gas molecules in the air move faster and spread apart.
This warm air rises up, in a kind of big, invisible cloud. As the warmer air rises, cooler air from other places flows in to replace the warm air. And this movement is what we call the wind.