Sky05313MineralsandRocks

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There are 3 types of rocks:__ __2 types of Igneous rock are:__ -Intrusive: which froms under the earths crust. -Extrusive: which forms above the earths surface. __3 types of Sedimentary rocks are:__ -Clastic: when rock or mineral fragments stick together. -Chemical: when sedimentary rock forms when minerals crystallize out of a solution eg: salt water becoming rock. -Oraganic: when rock forms from the remains of organisms. __2 types of Metamorphic rocks are:__ -Contact: Coming in contact with magma, when the magma moves through the earths crust it "cooks" it and turns the surrounding minerals into different minerals. -Regional: When pressure builds up in a rock that is deeply burried or when pieces of the earths crust collide.
 * Igneous**: Is caused by magma freezing or coolig;
 * Sedimentary:** Is formed at or near the earths surface, and itis not formed under heat and pressure;
 * Metamorphic:** Is when rocks undergo structure, texture, and composition changes due to heat and pressure;

__7 ways to distinguish minerals are:__ -Luster** (how does it reflect light?)
 * -Color
 * -Streak** (does it leave a mark on a ceramic tile?)
 * -Fracture** (how does it break?)
 * -Mohs Hardness Scale** (1-10, when you scratch it does it flake off?)
 * -Density** (Mass/Volume)
 * -Special Properties** (Magnetic, taste test, chemical reaction, radio active, optical, flourescent?)

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