how wind (outdoor/weather) is created.
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warm air rises up, this is because there’s fewer air molecules on top of them.
this in turn is because there’s gravity working on them to pull them down and their own movement and them repelling each other which counteracts that gravity. so there’s more down near the ground where gravity is strongest, and fewer high up where it’s weakest (even though the gravitational difference isnt all that big).
so when air is heated up those molecules move faster, bounce more into the other molecules, since there’s fewer on top of them than to the side, some of them move upwards which reduces the density in that spot.
which in turn means that the surrounding air molecules (which are also always bouncing around just at a slower speed/rate) will less often bounce into a molecule when they fly towards this “empty” space, which means that “the air” moves from the outside towards that spot where the air was heated up.
this is then further impacted by humidity (making the air “heavier” thus less bouncy) and the rotation of the earth (coriolis effect).
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