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Air moves due to a difference of air pressure which can be caused by different temperatures. Air pressure is the push caused by the particles in the air. Air pressure is not uniform throughout the atmoshpere but varies depending on many things! Air pressure causes weather patterns, such as storms. Air naturally wants to move to lower areas of pressure. This means if you were in a room and the left side had high air pressure, and the right side had low air pressure, then air would want to move from the left side to the right side!