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What do you mean by rock? How are rocks formed
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Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere. ... Igneous rocks are formed when magma cools in the Earth's crust, or lava cools on the ground surface or the seabed.
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A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle. Sedimentary rocks are formed from pieces of other existing rock or organic material.
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