| A | B |
| Vapors | fumes or gases |
| Flammable | substance that burns readily |
| Toxic | poison |
| Caustic | a substance that can destroy living tissue such as skin and eyes |
| Corrosive | substances that can eat through skin, clothing, and metals |
| Bunsen burner | heat source |
| Never touch | the sharp edges of tools like scalpels |
| Never touch | the metal prongs of electrical plugs |
| All blood | should be considered infectious |
| Unplug | electrical devices before cleaning or repairing them |