Video courtesy of the Little Shop of Physics.
Convection Cells Move Air Around
When you warm air, it rises. Cool air will sink. This process of convection can lead to flows in the atmosphere, in a manner than we can illustrate on a small scale. Warm and cool air in a fish tank rise and fall; this motion is made visible by adding fog. Ultimately, the motion leads to a convection cell, with air rising, moving to the side, falling, and moving back. This heat-driven motion of air moves heat around in the atmosphere. It is also responsible for making the wind blow.
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