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Ch 2 Section 1
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 nonmetallic |
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 arc like, 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 H2O at 4o C |