What state of matter is fire?

Flames

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The burning question – is fire a solid, liquid, gas or plasma?

The ancient Greeks recognised that fire doesn’t have the same physical properties as earth, air or water. But what exactly is fire? We still can’t quite pigeonhole fire into any of the fundamental states of matter that describe other substances so well. Read this Everyday chemistry article to find out which state of matter fire most resembles and why.

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