define rock???????????
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21
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A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks.
Answered by
36
the solid mineral material forming part of
the surface of the earth and other similar
planets, exposed on the surface or
underlying the soil.
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