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 also needs fuel – the substance which is being burned.
The flames we see are the visible part of the chemical process of burning, and they basically *are* trying to float away.
The reaction is tied to the fuel source, so as flames rise away from their source, they go out.
The greater the fuel supply and the stronger the reaction, the farther away flames can spread.
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