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E Science Chap 3
Vocabulary
Term | Definition |
---|---|
Mineral | Naturally occurring inorganic solid that has a definite chemical composition |
Crystal | Solid in which atoms are arranged in a repeating pattern |
Magma | Hot melted rock material beneath Earths surface |
Silicate | Mineral that contains silicon and oxygen and usually one or more other elements |
Hardness | Measure of how easily a mineral can be scratched |
Luster | Describes the way a mineral reflects light from its surface |
Specific Gravity | Ratio of a minerals weight compared to the weight of an equal volume of water |
Streak | Color of a mineral in powder form |
Cleavage | Physical property of some mineral that causes them to break along smooth surfaces |
Fracture | Physical property of some minerals that cause them to break uneven, rough, and jagged |
Gem | Beautiful, rare, highly prized mineral that is put in jewelry |