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All the different rocks found on the Earth are divided into three primary categories: igneous, sedimentary and metamorphic. All other smaller categories of rocks fall into one of these larger categories.
Igneous rocks are created by the cooling of magma which is a liquid found below the Earth's crust. Igneous rocks are gradually degraded by elements of the atmosphere like wind, water, etc. The resulting particles form rocks that lie in the category of rocks known as sedimentary rocks. Metamorphic rocks are formed when sedimentary, igneous or other metamorphic rocks are subjected to high pressures and temperatures. This changes the constituents of the original rocks and lead to chemical and physical changes which creates another class of rock.
next think about meteorites and whether they are one of the three classes....after all, not formed on earth and do we know what forces they have gone through?
No, just the three because all the rock found on Earth are put into igneous, sedimentary and metamorphic.
No, just the three because all the round on Earth are put into igneous, sedimentary and metamorphic.
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