Why does air not fall to the ground due to gravity? Also, why do lighter than air gases like helium rise?
In: Physics
As others have pointed out, air *does* fall. Air is a fluid. Denser fluids fall and displace less dense ones. The situation is easier to visualise in liquids, which are the other main type of fluid. A random but interesting example of this is found in the “seven-layer” tea that can be found in Bangladesh. https://en.wikipedia.org/wiki/Seven_Color_Tea
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