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Published byBritton Cobb Modified over 9 years ago
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Difference Between Rocks and Minerals
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Physical Properties of mineral are the same throughout Physical Properties of rocks vary from one part of the rock to another
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Rocks are classified according to origin (where and how it formed) either: Igneous, Metamorphic, or Sedimentary
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Minerals are classified according to their chemical composition and the arrangement of their atoms
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IGNEOUS ROCKS FOLLOWS WORKSHEET (GET OUT WORKSHEET)
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Igneous rock is rock formed by the cooling and hardening of molten rock
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Synonyms for Solidification Crystallization & Hardening
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Magma - liquid rock beneath the earth’s surface
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Lava - Liquid rock that has reached the Earth’s surface
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The only difference between magma and lava is LOCATION
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The solid grains or pieces of mineral that form when molten rock cools and hardens are called CRYSTALS
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If a rock has only one kind of mineral crystal it is called MONOMINERALLIC
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If a rock has more than one kind of mineral crystals it is called POLYMINERALLIC
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Monominerallic vs. Polyminerllic (Will Draw on Board)
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SIZE OF MINERAL CRYSTALS
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Large crystals form deep within the Earth. Small crystals form close to the Earth’s surface
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The faster the cooling the SMALLER the crystals, or the slower the cooling the LARGER the crystals
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INTRUSIVE IGNEOUS ROCK
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INTRUSIVE IGNEOUS ROCK A rock formed by cooling magma below the surface
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INTRUSIVE IGNEOUS ROCK Cooled SLOW
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INTRUSIVE IGNEOUS ROCK Contains LARGE crystals or grains
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INTRUSIVE IGNEOUS ROCK Formed INSIDE THE EARTH from MAGMA
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EXTRUSIVE IGNEOUS ROCK
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EXTRUSIVE IGNEOUS ROCK A rock formed by cooling lava on the surface
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EXTRUSIVE IGNEOUS ROCK cooled FAST
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EXTRUSIVE IGNEOUS ROCK Contains SMALL Crystals or Grains
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EXTRUSIVE IGNEOUS ROCK Formed on the surface of the Earth from lava
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TEXTURE Fancy name for Crystal size or how the surface feels
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Coarse Texture mean LARGE CRYSTALS
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Fine texture means SMALL CRYSTALS, makes it more difficult to identify
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Glassy Texture means very rapid cooling resulting in no crystals ex. Obsidian
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PUMICE - type of lava rock, rough surface with very low density, cooled rapidly trapping in gasses
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