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rocks and minerals
| Question | Answer |
|---|---|
| Acid rain- | precipitation of relatively high acidity that is formed when airborn oxides of sulfer nitrogen combine moisture in the atmosphere |
| Conglomerate- | a rock made of mineral and rock fragments |
| Crystal- | a solid substance in which the particles are arranged in an orderly,repeatable pattern |
| Crystallization- | the process by which crystals are formed |
| Cubic- | a crystal form characterized by three equal axes at right angles to each other |
| Evaporation- | the conversion of a substance from a liquid to a gaseous state |
| Fossil- | the remains,impressions,or other evidence of things presserved in rock |
| Hardness- | the resistance of the surface of a mineral to scratching by another substance |
| Hexagonal- | a crystal form characterized by three equal lateral axes intersected at 60 degrees and a vertical axis of variable length and right angles |
| Igneous- | a type of rock formed by the cooling and crystallization of molten materials |
| Indigneous- | occurring naturally in a partticular place or region |
| Laser- | light amplification by stimulated emission of radiation |
| Lava- | molten rock that flows from volcanoes or Earth fissures |
| Luster- | the way a mineral reflects light |
| Magma- | the hot, liquid rock within the Earths crust |
| Metallic luster- | describes a mineral that is usually dark in color, is always opaque,even on its thin edges,and shines like polished metal |
| Metamorphic- | a type of rock formed when igenous, sedimentary or even other metamorphic rock, are subject to extreme heat or presure deep below the earth's surface. |
| Mineral- | A naturally occuring solid, inorganic substance with a definite chemical composition and usually crystallin in form. |
| Mohs Scale of Hardness | a scale that ranks the hardness of minerals relative to the hardness of other minerals |
| Monoclinic- | a crystal form characterized by three unequal axes with one oblique intersection |
| Nonmetallic luster- | desribes a mineral that is usually light colored and whose surface appears gassy, greasy, brilliant, pearly, silky, or dull |
| Orthorhombic- | a crystal form characterized by three unequal axes at right angles to each other |
| Petrifaction- | The process of petrifying, or becoming a fossil (also known as petrification). |
| Piezoelectric- | a type of electric generated by applying pressure to crystalline substance such as quartz |
| Property- | any equalty that serves to desribe or define an object,material, or relationship |
| Rock- | A natural occuring inorganic substance usually comprised of a mixture of different minerals and other materials. |
| Sedimentary- | a type of rock formed by the solidification of layers of sediment |
| Silicon- | One of the most abundant elements on earth, its electric properties enable it to be used in electronic devices. |
| Streak- | the color of the fine powder of a mineral obtained by scratching or rubbing the mineral against a pieceof unglazed cermamic tile. |
| Tetragonal- | A crystal form characterized by three axes of right angles, of which only the two internal angles are equal. |
| Triclinic- | A crystal form characterized by three unequal axes intersecting at oblique angles |
| Weathering- | The discoloration or breakdown of rocks and minerals due to the action of water, the atmosphere, and organisms |