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Earth Science

Earth Science

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Earth Science

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  1. Earth Science Coach Williams Room 310B

  2. Chapter 5 • Igneous Rocks

  3. 5.1 • What are Igneous Rocks

  4. Igneous Rocks • Crystallized magma • “Ignis” = fire • Lava- magma flowing onto surface

  5. Types of Igneous Rocks • Extrusive • Cool quickly, fine-grained, on surface • Intrusive • Cool slowly, coarse-grained, beneath surface

  6. Identify: Igneous Rocks

  7. Magma • Slushy mix of molten rock, gases, minerals • SiO2 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

  8. Pictures of Igneous Rocks • http://geology.com/rocks/igneous-rocks.shtml

  9. How Rocks Melt • 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

  10. Bowen’s Reaction Series • Relationship: cooling magma/mineral formation