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Minerals
| Term | Definition |
|---|---|
| mineral | A naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition |
| inorganic | Not formed from living things or the remains of living things. |
| crystal | A solid in which the atoms are arranged in a pattern that repeats again and again. |
| streak | The color of a mineral's powder. |
| Mohs hardness scale | A scale ranking ten minerals from softest to hardest: used in testing the hardness of minerals. |
| luster | The way a mineral reflects light from its surface. |
| diamond | The hardness mineral |
| talc | The softest mineral |