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PCS E Sci
Minerals - CH 4
| Term | Definition |
|---|---|
| magma | molten material found under the earth's surface |
| mineral | naturally occurring, inorganic, solid with specific chemical composition |
| luster | the way a mineral reflects light |
| streak | color of a mineral when it is broken up and powdered |
| hardness | a measure of how easily a material can be scratched |
| cleavage | ability of a mineral to break easily and evenly along one or more flat planes |
| fracture | ability of a mineral to break into pieces with an arc like, rough, or jagged edge |
| specific gravity | the ratio of the weight of a substance to the weight of an equal volume of water |
| ore | the mineral contains a useful substance that can be mined for profit |
| gem | valuable minerals tat are prized for their rarity and beauty |
| crystal | a solid in which atoms are arranged in repeatatory patterns |
| silicate | minerals that have silicone and oxygen |