what is Rock ? explain it please fast
Answers
Answer:
A rock is a solid mass of geological material .Geological materials include individual mineral crystals inorganic non- mineral solid like glass , pieces broken from other rock and even fossils.
what is Rock ?
Rocks are a natural mass of mineral matter that makes up the earth's crust. They can be of different colour, size and texture.
explaination :
There are two basic types:
(1) Intrusive (formed underground)
(2) Extrusive (formed above ground)
Within those two major categories, there are many, many sub-categories. You can categorize an igneous rock by how it is formed, where it is formed in the earth, its chemical make-up, its mineralogical make-up, its appearance or a combination of these and other factors.
Extrusive rocks are formed at the surface and are fine grained due to rapid cooling and plutonic rocks are coarse grained forming deep underground where extremely slow cooling allowed the growth of large crystals. Hypabyssal rocks are intermediate between these types and form in dykes and sills at higher levels in the crust.
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