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The Rock Cycle
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Rocks are classified into three main groups, according to how they are formed: (1) igneous rocks,
(2) sedimentary rocks and (3) metamorphic rocks. Rocks are never actually destroyed; they are broken down and "recycled" in the rock cycle.

Rock Cycle Diagram modified from National Aeronautics and Space Administration
TEST YOURSELF - Transform the Rock   |   "Rock Cycle" BrainPOP Movie   |   Harcourt "Rock Cycle"
Water Cycle   |   ROCK CYCLE   |   Carbon Cycle   |   Nitrogen Cycle   |   Interactive Assessment Worksheets © by Alan & Hui Meng