Dry wood burning and producing ash is a chemical change because it involves a chemical reaction. When wood burns, it undergoes a combustion reaction in which the wood reacts with oxygen in the air to produce carbon dioxide, water vapor, and other byproducts. The formation of ash is also a result of this chemical reaction, as the remaining carbon and other impurities in the wood are left behind after burning. This process involves the rearrangement of atoms and the breaking and forming of chemical bonds, making it a chemical change.
