Rocks are made up of M-.-R-.-
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Rocks are made up of different minerals and form the Earth's crust (outer layer). Different combinations of minerals form rocks; minerals are made of elements. There are 3 different types of rocks; igneous, sedimentary and metamorphic. Igneous rock is formed when magma or lava from volcanoes cools.
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Rocks are composed primarily of grains of minerals, which are crystalline solids formed from a chemical compound arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds.
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