Is combustion a physical or chemical change? Why?
Look at the chemical make-up of the substances after the change, and compare them with the chemical make-up before the change. Is it different?
When ice melts, the chemical makeup before is
Combustion, however.....start with carbon, and oxygen
(Don't get sucked into the "physical changes are reversible, chemical changes aren't" nonsense....you'll eventually regret it if you do!)