What exactly is fire?

I've always wondered, what is fire? It's not a solid. It's not liquid. I don't think it's a gas. I don't think it's a bunch of ionized gases or whatever plasma's supposed to be.

Fire is what happens during some chemical reactions.  Chemical reactions need energy to happen.  Fire produces heat and light therefore fire is actually energy. Thread over!

Go back to grade school science. ^___^;;