What are rocks??
Explain in Detail
Answers
1. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surfaceor underlying the soil.
2. a large piece of rock which has become detached from acliff or mountain; a boulder
.3. used to refer to someone or something that is extremelystrong, reliable, or hard.
4. (especially with allusion to shipwrecks) a source of danger or destruction.
Rocks are naturally formed, consolidated material composed of grains of one or more minerals. Geologists group rocks into three categories depending on their origin: igneous, sedimentary and metamorphic.
A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure.
Igneous rocks are formed from solidification of molten material. Sedimentary rocks are formed by the accumulation of fragmental material derived from preexisting rocks of any origin as well as the accumulation of organic material or precipitated material. Metamorphic rocks occur as a result of high pressure, high temperature and the chemical activity of fluids changing the texture and (or) mineralogy of preexisting rocks.