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ES Vocab 9/19/14
Vocabulary
Term | Definition |
---|---|
mineral | a naturally occurring, inorganic solid, with a specific chemical composition and a definite crystalline structure |
crystal | a solid in which the atoms are arranged in repeating patterns |
luster | the way that a mineral reflects light from its surface |
hardness | a measure of how easily a mineral can be scratched |
cleavage | a mineral that splits relatively easily evenly along one or more flat planes |
fracture | when a minerals breaks with jagged or uneven edges |
streak | the colour of a mineral when it is broken up and powdered |
streak | the colour of a mineral when it is broken up and powdered |
specific gravity | the ratio of the mass mass of a substance to the mass of an equal volume of water at 4 degrees celcius |