Question

why is a rotting wooden deck a chemical change

Answer 1

rotting wood is a decomposition reaction. The chemicals in the wood ( mainly the hydrocarbon cellulose a polysaccharid ) break down into simpler molecules. Bacteria, and other decomposers "eat" the wood breaking the complex molecules into energy and simpler molecules. such as Carbon Dioxide, and water.

Answer 2

The rotting of wood is a chemical change. A chemical change or reaction is when the substance has been altered chemically and displays differences in both chemical and physical properties. A chemical changesinclude burning, rotting, cooking or rusting.