Edit: This question is much more complicated than it would first appear lol.
In: Physics
Temperature is “the atom moving” in the sense of how fast the electrons swirling around the middle, not the whole thing moving.
You could have a stone-cold pile of atoms screaming through space at near light speed.
You could have a super-hot atom at a stand-still at the core of a reactor.
For gases specifically, when the electrions swirl about faster and they spread out, pushing other atoms away. That makes the whole thing less dense, lighter, and that’s going to cause it to rise and move about and stuff.
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