1.) The fact that matter can be neither created nor destroyed in a chemical change. 2.) Substance that changes to a gas easily at room temperature. 3.) Any chemical reaction that absorbs energy. 4.) Can be observed only when there is a change in composition of a substance. 5.) Any chemical reaction that gives off energy. 6.) The amount of matter contained in a unit of volume. 7.) The type of change in which the identity of substances does not change. 8.) The change of one or more substances into other substances. 9.) Can be observed without any change in the identity of the substance. 10.) Another term for chemical change.
chemical property physical change physical property chemical change density law of conservation of mass chemical reaction volatile endothermic exothermic energy
