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chapter 11 vocab.

21 vocab. words

TermDefinition
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
Created by: CailinCavanaugh