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The rock cycle • Topics: Mineral and Rock processes; Characteristics of rocks and minerals • NCSCOS 3.04 Describe the processes which form and the uses of earth materials: rock cycle, minerals, characteristics of rocks, economic use of rocks and minerals, value of gems and precious metals, common gems, minerals, precious metals and rocks found in NC. • ES 6.E.2.3 Explain how the formation of soil is related to the present rock type and the environment in which it develops. 6.E.2.3 explained: Forces deep inside Earth and at the surface produce a slow cycle that builds, destroys, and changes rocks and crust. Plate movements start the rock cycle by helping to form magma, the source of igneous rocks. Plate movements also cause faulting, folding and other motions of the crust that help form sedimentary and metamorphic rock. Minerals form as hot magma cools inside the crust, or as lava harden on the surface. When liquids cool to a solid state, they form crystals. When elements and compounds that are dissolved in water leave a solution, crystallization of minerals occurs. Types of Rocks Igneous Metamorphic Sedimentary Rocks Sedimentary Come to the board and draw the rock cycle. Start with magma Rock cycle interactive • http://www.classzone.com/books/earth_scien ce/terc/content/investigations/es0602/es0602 page02.cfm • www.classzone.com Answers to puzzle