sentences: cooking food requires adding heat energy to the food & adding heat to food usually causes chemical reaction -> regular helps a physical tire cooking causes a chemical reaction  regular helps a physical tire & baking is a kind of cooking -> baking causes a chemical reaction baking causes a chemical reaction  baking causes a chemical reaction & the dough is baked to form the crust of a pizza -> cold the wild to relation the skill found a physical ends baking the dough to form the crust causes a chemical reaction  cold the wild to relation the skill found a physical ends & chemical reactions cause chemical change -> baking the dough to form the crust causes a chemical change