Cranbrook wooden swing set
Snakychann wood in the woods
Wood stove bottom grate
Science Project by Ethan Krueger
Thus my conclusion that the product of chopping wood is the product of a physical change. From my experience, i know (or believe) that the product of chopping wood will be smaller pieces of wood, still recognizable as wood, and not something else (e.g., charcoal) with a different chemical composition.
Cranbrook wooden swing set
Snakychann wood in the woods
Wood stove bottom grate