| A | B |
|---|
| compound | when two or more elements are chemically combined |
| cleavage | when a mineral breaks easily along flat surfaces |
| crystal | atoms are arranged in a repeating pattern |
| element | all of the atoms are alike |
| fluorescence | when minerals glow under ultraviolet light |
| inorganic | no part is from a living thing |
| luster | how a mineral reflects light from its surface |
| Mohs Hardness scale | used to rank minerals from hardest to softest |
| streak | the color of a mineral's powder |
