There are types of rock
Igneous rocks are formed by (melted underground rock) which is pushed up to the and often out
Igneous rocks contain various in randomly arranged . The and of the crystals depend on speed of cooling
There are 2 types of igenous rock- and
Extrusive igneous rocks cool ground
Intrusive igneous rocks cool ground
Igneous rocks don't form as any wil have melted to form in the original rock
Sedimentary rocks are formed by layers of , which are that are deposited
To form sedimentary rocks, over time the are together by that act as glue
To form sedimentary rocks, the weight of the on top squashes the at the botoom. This is called
can form in the sediments. this is the long dead remains of animals and plants
Metamorphic rocks are made by the result of and pressure acting on existing over a period of time
Metamorphic rocks may have tiny and some have
Metamorphic rocks are always made from crystals
Metamorphic rocks usually have different properties to the from which
Metamorphic rocks are never made from rock
Metamorphic rocks rarely contain . The don't normally usrvive the and
Metamorphic rocks can be heated up by the movement of or
The higher temperature and pressure of rock when formed, the crystal size and the thickness of layers
