what are rocks?

Question

info on rocks,types of rocks,rock which is naturally occuring substance.

Answer 1

A rock is a naturally occurring aggregate of minerals and/or mineraloids. Rocks are classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into igneous, sedimentary and metamorphic. They may also be classified according to grain size, in the case of conglomerates and breccias or in the case of individual stones.

1.Igneous rocks
Igneous rocks are formed from molten magma and are divided into two main categories: plutonic rock and volcanic. Plutonic or intrusive rocks result when magma cools and crystallises slowly within the Earth's crust, while volcanic or extrusive rocks result from magma reaching the surface either as lava (when the molten rock is in the mantle, it is called magma, when it is above the crust, it is called lava) or fragmental ejecta. Intrusive igneous rocks usually take a few thousand years to cool whereas extrusive igneous rocks take only a few days or weeks to cool and solidify.

2.Sedimentary rocks
Sedimentary rocks are formed by deposition of either clastic sediments, organic matter, or chemical precipitates (evaporites), followed by compaction of the particulate matter and cementation during diagenesis. Sedimentary rocks form at or near the Earth's surface.

3.Metamorphic rocks
Metamorphic rocks are formed by subjecting any rock type (including previously-formed metamorphic rock) to different temperature and pressure conditions than those in which the original rock was formed. These temperatures and pressures are always higher than those at the Earth's surface and must be sufficiently high so as to change the original minerals into other mineral types or else into other forms of the same minerals (e.g. by recrystallisation).

-The transformation of one rock type to another is described by the geological model called the rock cycle.

-The Earth's crust (including the lithosphere) and mantle are formed of rock.

-Petrology is the study of rocks.

Answer 2

A mineral is usually defined as a homogeneous, naturally occurring, inorganic solid.Each mineral has a definite chemical composition and a definite crystalline structure.A rock may be thought of as an aggregate of minerals. Igneous (volcanic) or (plutonic) sedimentary and metamorphic are types of rocks. The National Audobon Society Field Guide to North American Rocks and Minerals is a great book that tells you all you want to know about rocks. And it is loaded with pictures to aid in identification.

Answer 3

A rock is a naturally occurring aggregate of minerals and/or mineraloids. Rocks are classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into igneous, sedimentary and metamorphic. They may also be classified according to grain size, in the case of conglomerates and breccias or in the case of individual stones.

Igneous rocks
Igneous rocks are formed from molten magma and are divided into two main categories: plutonic rock and volcanic. Plutonic or intrusive rocks result when magma cools and crystallises slowly within the Earth's crust, while volcanic or extrusive rocks result from magma reaching the surface either as lava (when the molten rock is in the mantle, it is called magma, when it is above the crust, it is called lava) or fragmental ejecta. Intrusive igneous rocks usually take a few thousand years to cool whereas extrusive igneous rocks take only a few days or weeks to cool and solidify.

Sedimentary rocks
Sedimentary rocks are formed by deposition of either clastic sediments, organic matter, or chemical precipitates (evaporites), followed by compaction of the particulate matter and cementation during diagenesis. Sedimentary rocks form at or near the Earth's surface.

Metamorphic rocks
Metamorphic rocks are formed by subjecting any rock type (including previously-formed metamorphic rock) to different temperature and pressure conditions than those in which the original rock was formed. These temperatures and pressures are always higher than those at the Earth's surface and must be sufficiently high so as to change the original minerals into other mineral types or else into other forms of the same minerals (e.g. by recrystallisation).

The transformation of one rock type to another is described by the geological model called the rock cycle.

The Earth's crust (including the lithosphere) and mantle are formed of rock.

Petrology is the study of rocks

Answer 4

To be honest, I'm glad the music is actually getting all the attention now than the actual stars because let's face it, the music MADE the stars! That's why they're ROCKstars and why they are known. They are not known for their exploits but for their work that makes the exploits known. Which is also similar to what Rckets was saying. But I do get what you mean about the focus being made entirely on the genre and not on the actual actions of the artist. The artist is the one who makes the music and produces it so they should be recognized too. But you got to admit, most individuality has gone down society's drain hole so I don't think it matters what people do anymore because it's nothing new. Just hot attention for a tabloid newspaper.

Answer 5

I teach 3rd grade and I have been teaching this to my students. :)

1. igneous These are rocks made from magma. They are nicknamed Fire Rocks.

2. sedimentary These rocks are made from layers and layers of sand over thousands of years.

3. metamorphic Metamorphic rocks are made from igneous and sedimentary rocks that are put under so much pressure that they change into a new type of rock.

Answer 6

Intrusive igneous rocks are formed when the magma cools underground; while extrusive igneous rocks are formed
The three types of rocks are:-
Igneous, Sedimentary and Metamorphic

Answer 7

your head

Answer 8

Some can be a source of joy, companionship, emotional support and comfort that lasts a life time.

Peter, my pet rock, asked me to let you know this in the hopes that someday you too will meet that perfect rock that was formed just for your benefit. Good luck.

Answer 9

Rocks as per normal English means ' lumps'. It can be made of any substance. You are not clear, to what, you are referring to.

Answer 10

compressed solid masses of minerals, there are 1000's of varietys of rocks..they fall into the mineral catagory along with gemstones, which is where most natural gems are formed.