5. What do you call rocks that have been altered by heat and pressure beneath the earth's surface? A. extrusive igneous rocks C. metamorphic rocks B. intrusive igneous rocks D. sedimentary rocks 6. What characteristic is found in sedimentary rocks? A. crystals C. gas bubbles B. fossils D. glassy surface 7. When magma crystallizes and forms big crystals while still inside the earth, what type of rock is formed? A. extrusive igneous rock B. intrusive igneous rock C. metamorphic rock D. sedimentary rock 8. Which rock cycle processes are involved in the formation of igneous rocks? A. compacting and cementing B. heat and pressure C. melting and cooling D. weathering and erosion 9. Which of the following processes of the rock cycle can change granite, (igneous rock), into gneiss (metamorphic rock)? A. compacting and cementing C. melting and cooling B. heat and pressure D. weathering and erosion
