There are three ways that geologist classify rocks into three major groups. One of those groups is Igneous rock. An Igneous rock is a rock that forms from the cooling of magma or lava.There are two ways a Igneous rock can form. Extrusive and Intrusive rocks. Extrusive rocks from outside of the earth's crust. Once the magma comes above the surface, it turns to lava and Extrusive rocks can form. Intrusive rocks form inside of the earth crust, and forms by magma.
About 3,000 years ago ancient Egyptians used Igneous rocks, such as granite, to create builds and statues. Back 600 years ago, the Incas used Granite and other Igneous rocks to create statues and buildings. Today we use igneous rocks for kitchen tables, gravestones, counter tops, concrete, building, columns, cleaning products, and other uses.
About 3,000 years ago ancient Egyptians used Igneous rocks, such as granite, to create builds and statues. Back 600 years ago, the Incas used Granite and other Igneous rocks to create statues and buildings. Today we use igneous rocks for kitchen tables, gravestones, counter tops, concrete, building, columns, cleaning products, and other uses.