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rocks & Minerals

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Question
Answer
acid rain   Precipitation of relatively high acidity that is formed when airborne oxdies of sulfer and nitrogen combine with moisture in the atmosphere.  
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conglomerate   A rock made out of mineral and rock fragments  
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crystal   A soild sudstance in which the particles are arranged in a orderly, repeatable pattern  
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crystallization   The process of which crystals are formed.  
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cubic   A crystal form characterized by three equal axes at right angles to each other.  
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evaporation   The conversion of a sudstance from a liquid to a gaseous state.  
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fossil   The remians, imprressions, or other evidence of living things preserved in a rock.  
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hardness   The resistance of a mineral to scratching by another sudstance.  
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hexagonal   A crystal form characization by three equal lateral axes intersected at 60 degrees and a vertical axis of variable lenght at right angles.  
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igneous   A type of rock formed by the cooling and crystallization of molten materials.  
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indigenous   occuring naturally in a particular place or region.  
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laser   Light Amplification by Stimulated Emission of Radiation.  
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lava   Molten rock that flows from volcanoes or earth fissures  
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luster   The way a mineral reflects light  
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magma   The hot, liquid rock within the Earth's crust.  
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sedimentary   A type of rock formed by solidification of layers of sediment.  
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silicon   One of the most abundant elements on earth; its electrical properties enable it to be used in electronic devices.  
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streak   The color of the fine powder of a mineral obtained by scratching or rubbing the mineral against piece of unglazed ceramic tile.  
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tetragonal   A crystal form characterized by three axes at right angles, of which only the two lateral angles are equal.  
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triclinic   A crystal form characterized by three unequal axes intersecting at oblique angles.  
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weathering   The discoloration or breakdown of rocks and minerals due to the action of water, the atmosphere, and organisms.  
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metallic luster   Describes a mineral that is usually dark in color, is always opaque, even on its thin edges,and shines like polished metal.  
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metamorphic   A type of rock formed when igneous, sedimentary, or even other metamorphic rocks are subjected to extreme heat and/or pressure deep below the earth's surface.  
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mineral   A naturally occurring, solid, inorganic substance with a definite chemical composition and usually crystalline in form.  
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Mohs Scale of Hardness   A scale that ranks the hardness of minerals relative to the hardness to other minerals.  
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monoclinic   A crystal form characterized by three unequal axes with one oblique intersection.  
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nonmetallic luster   Describes a mineral that is usually light colored and whose surface appears glassy, greasy, brilliant, pearly, silky, or dull  
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orthorhombic   A crystal form characterized by three unequal axes at right angles to each other.  
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petrifaction   The process of petrifying, or becoming a fossil (also known as petrification).  
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piezoelectric   A type of electricity generated by applying pressure to a crystalline substance such as quartz.  
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property   Any quality that serves to describe or define an object, material, or relationship.  
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rock   A naturally occurring inorganic solid usually comprised of a mixture of different minerals and other materials.  
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