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Name_______________________________________________________________________ Date__________________________________ Hour ____________ Igneous Rock Section 5.1 pages 112-117 Read and complete each statement. 1. 2. 3. Molten rock inside Earth’s crust is called _______________________________________________________________________. A(n) __________________________________________________________________ is formed from the crystallization of magma or lava. Magma that flows out onto Earth’s surface is called ________________________________________________________________. For each statement below, write true or false. ___________________________4. Magma is often a slushy mix of molten rock, gases and mineral crystals. ___________________________5. Silica is the most abundant compound found in magma. ___________________________6. Magmas are classified as basaltic, andesitic, or rhyolitic. ___________________________7. In the laboratory, rocks must be heated from 8000oC to 12000oC before they melt. __________________________ 8. Heat in the upper mantle and lower crust may come, in part, from the decay of radioactive elements. Section 5.2 pages 118-123 1. 2. 3. 4. 5. 6. 7. 8. 9. When magma cools and crystallizes below Earth’s surface it is called ________________________________________________. When lava cools and crystallizes on Earth’s surface it is called ________________________________________________________. What are the two classifications of igneous rock according to their mineral compositions? ____________________________________________and ________________________________________________. Explain the silica content of basaltic and granitic rocks. ________________________________________________________________ ________________________________________________________________________________________________________________________________ What are the two types of texture for igneous rock? __________________________________ and ____________________________. Explain what happens to lava that cools on the Earth’s surface. What type of crystals are formed? Give two examples of this type of rock. ____________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ Explain what happens to magma that cools below the Earth’s surface. What type of crystals are formed? Give two examples of this type of rock. _______________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ What causes minerals to form both large and small crystals in the same rock? ______________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ Explain how vesicular rocks are formed. Give an example. ____________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________