When wood is burned to ash, that ash is mainly carbon. I'm pretty sure it's just carbon. Carbon is in everything and it doesn't burn very well so that's why it's left over from when you burn something.
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Burnt wood is commonly referred to as charcoal. It is a black residue that is left when wood is burned in the absence of oxygen.
After wood has burnt, you are left with ashes, which are the residue of the wood that did not combust during the burning process. Ashes can be used as a fertilizer, in soap-making, or as a component in construction materials.
heat and oxygen are produced when it is burnt. if my answer is wrong call me on 07734 940264
Burnt Wood to cook and heat their houses.
The black substance on a burnt match is called soot. It is formed when the matchstick burns and the carbon in the wood is not completely combusted, leading to the black residue.
Cutting a log into smaller pieces would be an example of a physical change. The wood is still wood, just in smaller pieces, so the chemical composition remains the same.