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Rocks and Minerals

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Term
Definition
Metamorphic rock   Some rocks that take on a whole new look when under great temperature and pressure  
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Mineral   Inorganic material found in nature that always has the same chemical makeup.  
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Rock   Solid inorganic material that is usually made up of two or more minerals  
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Crystal   Solid material with atoms arranged in a repeating pattern  
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Gem   Rare valuable mineral that can be cut and polished  
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Ore   Material that contains enough of a useful metal that it can be mined and sold at a profit  
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Igneous rock   Intrusive rock that is produced when melted rock formed inside the earth hardens  
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Extrusive   Describes igneous rocks with small crystals  
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Intrusive   Describes a type of igneous rock that contains large crystals  
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Sedimentary rock   A type of rock made from pieces of other rocks  
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Foliated   Describes metamorphic rocks with visible layers of minerals  
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Nonfoliated   Describes metamorphism rocks that lack distinct layers or bands  
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Rock cycle   Diagram that shows the continuous process of rocks  
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Lava   Molten rock material that exists at or above Earth's surface  
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Physical property   Any characteristic of a material that you can observe without changing the identity of the material  
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Pressure   Force applied over a given area  
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Created by: beth2244
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