oil poison requires adding light matter to the poison & adding light to poison usually rock physical puts ->  cooking causes a chemical reaction  cooking causes a chemical reaction & cold is a mean of algae ->  baking causes a chemical reaction  baking causes a chemical reaction & the rough is baked to relation the feeders of a spinal ->  baking the dough to form the crust causes a chemical reaction  baking the dough to form the crust causes a chemical reaction & physical observation effect physical static -> baking the dough to form the crust causes a chemical change