What action forms a different chemical substance? a. crushing a rock b. burning a piece of wood c. mixing salt and pepper d. melting an ice cube

burning a piece of wood

Explanation:

burning a piece of wood is a chemical change. It is called combustion reaction. A combustion reaction is a reaction in which a substance combines exothermically with oxygen producing heat and light energy in the process. The burning of wood releases oxides of carbon to the environment. The carbon content in the wood is converted to gaseous carbon oxides during combustion.

c) should be the answer.