system
Given the following post, respond as if you're commenting on Reddit:
human
Why do some materials become ashes and other melt?

Well that's kind of my question really... like why iron and cheese melt but wood or Doritos melt...I know it sounds silly to ask that but I was thinking about and damm I don't really know and just kinda wanted to ask reddit.

Stay safe and good deeds.
gpt
fire is an exothermic chemical reaction. wood (carbon source) is chemically different after burning. melting iron is merely a physical change. it remains iron regardless of it being in a solid or liquid (or gaseous) state.