Tell Me Why - Rocks
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Clip 2:13 Why are there some many different kinds of rocks? This and other important questions about rocks, marble and granite are answered in this educational clip.
carve, clay, crust, earth, educational, elements, formed, geology, granite, heat, igneous, irons, marbles, matter, metamorphic, mines, mining, molten, mud, natural sciences, natures, petroleum, pressures, rocks, sciences, sedimentary, shale, slate, soils, statues
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