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Geology
Terms - Minerals
| Term | Meaning |
|---|---|
| proton | positively charged subatomic particles contained in the nucleus of an atom |
| neutron | electronically neutral subatomic particles contained in the nucleus of an atom |
| electron | negatively charged particles that orbit the nucleus in shells or energy levels |
| mineral | naturally occuring, solid, inorganic, has a definite chemical composition, has an orderly internal arrangement of atoms |
| streak | color of a mineral's powder |
| hardness | a mineral's resistance to being scratched |
| luster | the way light is reflected from the mineral's surface |
| cleavage | when a mineral breaks with flat sides along planes of weakness |
| fracture | when a mineral breaks irregularly |
| specific gravity | how heavy a mineral is; density compared to water |
| element | a substance that cannot be broken down into smaller substances by ordinary chemical means |
| native element | an element that exists alone in nature (EX: gold - Au) |
| compound | substance consisting of two or more elements chemically combined |
| atom | the smallest part of an element that has all the characteristics of that element |