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vocabulary rock and minerals

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Question
Answer
Geologist   scientist who study rocks and minerals to help us learn about the formation of the earth  
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Granite   rock composed of minerals - Igneous rock  
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Hardness   how resistant a mineral is to being scratched  
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Igneous rocks   formed from minerals that have melted deep within the Earth - "fire made" formed from melted rock materials  
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Luster   the way a mineral reflects the light  
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Metamorphic rocks   formed from igeneous, sedimentary, or other metamorphic rocks which contain materials that have been changed by heat, pressure, or chemical recation.  
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Mineral   minerals are naturally occuring substances. Each mineral has its own chemical composition. Minerals are inorganic (not alive)substances. Always solid.  
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Rock   earth materials made up of different kinds of materials  
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Rock cycle   a never ending process by which rocks are changed from one type to another  
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Scratch test   used to determined the hardness of a material  
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Sedimentary rocks   formed as particles settle to the bottom of the ocean and lakes. Smaller bits of rocks pressed or cemented together. Form layers.  
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