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Earth Material ellen
Question | Answer |
---|---|
mineral | a naturally occuring, inorganic solid with a definate chemical composition |
crystal | a solid in which the atoms are arranged in orderly, repeating patterns |
magma | hot melted rock material |
silicate | minerals that contain silicon and oxygen and usually one or more elements |
hardness | the measure of how easily a mineral can be scratched |
luster | the way minerals reflect light |
streak | the color of a mineral when it's in powdered form |
cleavage | minerals that break along smooth flat surfaces have cleavage |
fracture | minerals that break with uneven rough or jagged surfaces have fracture |
gem | highly prized minerals that are rare and beautiful |
ore | a mineral or rock that contains a useful substance that can be mined at a profit |