2. What are the three main types of rock? How are they formed?
Answers
Answer:
Types of rocks
Metamorphic rocks
Sedimentary rocks
igneous rocks
igneous rocks, also known as volcanicrocks, are formed at the crust's surface as a result of the partial melting of rocks within the mantle and crust. Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface.
Formation of metamorphic rocks
Metamorphic rocks are created by the physical or chemical alteration by heat and pressure of an existing igneous or sedimentary material into a denser form. ... In some cases, heat from the Earth's interior can melt the rock slightly, in a process termed "contact metamorphism."
Sediment transport and deposition
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. Thissediment is often formed when weathering and erosion break down a rock into loose material in a source area.
Igneous, sedimentary and metamorphic rocks are the three types of rocks. ... to form sedimentary rocks, or they may melt under great heat and pressure to form ... igneous rocks are formed by volcanoes...