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Earth 4 Vocab
Chapter 4 Vocab
Term | Definition |
---|---|
Mineral | Naturally occurring, inorganic solid with a specific chemical composition and a definite crystalline structure. |
Crystal | Solid in which atoms are arranged in repeating patterns. |
Luster | The way that a mineral reflects light from its surface; two types- metallic and nonmetalic |
Hardness | Measure of how easily a mineral can be scratched, which is determined by the arrangement of a mineral's atoms. |
Cleavage | The manner in which a mineral breaks along planes where atomic bonding is weak. |
Fracture | When a mineral breaks into pieces with arclike, rough, or jagged edges |
Streak | Color a mineral leaves when it is rubbed across an unglazed porcelain plate or when it is broken up and powdered. |
Specific Gravity | Ratio of the mass of a substance to the mass of an equal volume of H20 at 4 degrees C. |