| A | B |
|---|
| mineral | a naturally ocurring, inorganic solid with a specific chemical composition and a definite crystalline structure |
| crystal | a solid in which the atoms are arranged in repeating patterns |
| magma | moltern material found beneath Earth's surface |
| silicate | minerals that contain silicon and oxygen and usually one or more other elements |
| luster | the way that a mineral reflects light from its surface |
| streak | the color of a mineral when it is broken up and powdered |
| hardness | a measure of how easily a mineral can be scratched |
| cleavage | when a mineral splits relatively easily and evenly along one or more flat planes |
| fracture | minerals that break with rough or jagged edges |
| specific gravity | the ratio of the weight of a substance to the weight of an equal volume of water at 4 degrees C. |
