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Rocks & Minerals
Unit 5 vocab
| Term | Definition |
|---|---|
| Cleavage | A physical property of some minerals that causes them to break smoothly |
| Crystal | A solid in which the atoms are arranged in a repeating pattern |
| Fracture | A physical property of some minerals that causes them to break jaggedly |
| Gem | A rare mineral that is commonly used in jewelry |
| Hardness | How hard something is |
| Luster | The way a mineral reflects light |
| Magma | Hot, melted rock undergorund |
| Mineral | A naturally occurring solid |
| Ore | A deposit in which a mineral exists |
| Silicate | Describes a mineral that contains silicon and oxygen |
| Specific Gravity | The ratio of a mineral's weight compared to the weight of an equal volume of water |
| Streak | The color of a mineral in its powdered form |
| Basaltic | Describes dark-colored igneous rocks |
| Cementation | A type of forming of sedimentary rocks |
| Extrusive | Describes fine-grained igneous rocks |
| Foilated | Describes metamorphic rocks |
| Granitic | Describes generically light-colored rocks |
| Igneous Rock | A type of rock formed when magma or lava cools and hardens |
| Intrusive | Describes a type of igneous rock that generally contains large crystals |
| Metamorphic Rock | A type of rock that forms when heat, pressure, or fluids act on any other rock |
| Non-Foilated | Describes metamorphic rocks of which grains do not generally form layers |
| Rock | A mixture of one ore more minerals |
| Rock Cycle | A model that shows how rocks slowly change from one to another |
| Sediment | A loose material that has been moved by wind, water, ice, or gravity |
| Sedimentary Rock | A type of rock that forms when sediments are compacted and cemented together |