| A | B |
|---|
| volatile | a substance that changes to a gas easily at room temperature |
| density | the amount of mass per volume |
| chemical property | a property that can only be observed when there si a change in the composition of a substance |
| chemical change | the change of one or more substances into other substances |
| chemical reaction | another term for chemical change |
| law of the conservation of mass | matter is neither created or destroyed |
| energy | the ability to do work |
| exothermic | chemical reactions that give off heat energy |
| endothermic | chemical reactions that absorb heat energy |
