* Reactants and Products: Burning wood involves the reaction of wood (cellulose, lignin, etc.) with oxygen from the air. This reaction produces carbon dioxide, water vapor, ash, and heat. You have reactants (wood and oxygen) transforming into different products.
* Chemical Change: The wood itself is chemically altered during burning. The complex molecules in wood break down, forming new molecules. This is a clear sign of a chemical change.
* Energy Release: The burning process releases a significant amount of energy in the form of heat and light. This is a key characteristic of many chemical reactions.
In summary: Burning wood is a combustion reaction, a type of chemical reaction where a substance reacts rapidly with oxygen, producing heat and light.
