| A | B |
|---|
| flame | the often bright zone of burning gases and fine suspended particles that forms as a result of a fire |
| flammable | easy to set fire to and capable of burning very rapidly |
| ignite | to set fire or catch fire |
| ignition | the act or process of igniting, or starting a fire |
| precise | distinct from others; particular |
| precision | the condition, property, or quality of being precise, or exact |
| meter | the basic unit of length in the metric system, equal to 39.37 inches |
| metric | of, involving, or using the metric system |
| microscope | an instrument in which the light reflected from or projected through a tiny object is passed through a combination of lenses so as to produce a magnified image of the object that is large enough to be seen or studied |
| microscopic | to small to be seen by the eye alone but large enough to be seen through a microscope |
| grave | extremely serious; critical |
| gravity | seriousness; importance |
| grateful | appreciative; thankful |
| gratitude | appreciation or thankfulness, as for something received or kindness shown |
| revise | to edit in order to improve or bring up to date |
| revision | the act or process of revising |
| athlete | a person who competes or takes part in sports |
| athletic | of or for athletics |
| humane | kind; compassionate; merciful |
| humanity | human beings in general; humankind |
