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chapter 11 vocab.
21 vocab. words
Term | Definition |
---|---|
Mineral | Naturally occurring, inorganic, crystalline solid having chemical composition |
Crystal structure | Arrangement of atoms in a specific arrangement |
Streak | Residue or powder of a mineral |
Luster | The way a mineral looks in reflected light |
Hardness | Resistance of a mineral to being scratched |
Cleavage | Tendency of a mineral to break along zones of weakness to form smooth parallel sides or surfaces |
Fracture | Mineral lacks preferred zones of weaknesses and shows uneven breaking |
Crystal shape | Outward geometric shape of a mineral |
Texture | Size, shape, and arrangement of materials the rock is composed of, not roughness |
Sedimentary rock | Rocks that form from an accumulation of sediments |
Organic | Anything related to living organisms or to things that are alive |
Fossil | Any evidence to former life left behind usually in sedimentary rocks |
Igneous rocks | Rocks formed from molten material that hardens as it cools |
Magma | Liquid rock beneath the earths solid surface |
Intrusive igneous rocks | Rocks that form from solidified magma below the earths surface |
Extrusive igneous rocks | Rocks that form when lava solidifies at or above earths surface |
Metamorphic rocks | Rocks that form due to heat and pressure |
Foliation | Layering of mineral crystals |
Contact metamorphism | Older rocks are modified when they come in contact with the magma intrusion of lava and extrusion |
Regional metamorphism | Increase in temperature and pressure transforms older rocks to metamorphic rocks |
Rock cycle | Model used to show how the rock types are interrelated |