Oxygen and Nitrogen make up a significant part of the atmosphere. Fire always stretches upwards, assuming no wind, leading me to believe it’s less dense than air. Oxygen is highly flammable. That should be everything fire needs to sustain itself while flying away into the sky.
In: Chemistry
Fire stretches upwards because it heat the air, which make the air expand, more less dense and rise up, dragging the fire with it. But that’s only work in gravity, because without gravity you don’t have buyouncy and the denser cold air won’t go down pushing the hotter less dense air up.
Here a video about that.
[https://www.youtube.com/watch?v=BxxqCLxxY3M](https://www.youtube.com/watch?v=BxxqCLxxY3M)
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