Coach Williams Room 310B.  Igneous Rocks  What are Igneous Rocks.

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The rocky outer layer of the Earth.
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Presentation transcript:

Coach Williams Room 310B

 Igneous Rocks

 What are Igneous Rocks

 Crystallized magma  “Ignis” = fire  Lava- magma flowing onto surface

 Extrusive ◦ Cool quickly, fine-grained, on surface  Intrusive ◦ Cool slowly, coarse-grained, beneath surface

 Slushy mix of molten rock, gases, minerals  SiO 2 most abundant  800 – 1200 ° F to melt rocks  Factors that affect magma ◦ Temperature- deeper = hotter ◦ Pressure- deeper = more pressure ◦ Water- affects melting point ◦ Minerals- affects melting point

 Partial Melting ◦ Different substances, different melting points ◦ Rock parts melt at different temperatures  Fractional Crystallization ◦ Magma cools and crystallizes ◦ Rock parts crystallize at different temperatures

 Relationship: cooling magma/mineral formation

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