It's just the cold air flowing to take place of the warm air. This is called circulation. This movement creates wind. By Jessica Wind may blow really slow and gentle, so that you can't even feel the wind when it blows. Or the wind might blow so hard and fast that the wind will push over power lines.
Wind can also start up tides and then destroy ships.
Wind may blow the soil away from farmers so that farmers can't grow their crops. Wind is also a type of weather. A hot day may soon turn cold if wind comes from a cool place. Clouds, and rain with lightning may be where the cool air meets. Later a wind may blow the clouds away, then allow the son to come out.