The Three Main Rocks
There are three main rocks on Earth.
They are Igneous rock,Sedimentary rock,
and metamorphic rock.
Igneous Rock
Igneous rock is rock made from magma or
it can be made from lava that is hardened
and cooled.The nickname for Igneous rocks is "fire made" rock.There is 2 types
of Igneous rock.They are intrusive Igneous
rock,and extrusive Igneous rock.Intrusive
Igneous rock is magma that has been cooled and turned into rock.An example
of intrusive Igneous rock is granite.
Sedimentary Rock
Sedimentary rocks are sediments and decomposed plants and animals mashed together by pressure.Some examples of Sedimentary rocks are limestone,and sandstone.
Metamorphic Rock
Metamorphic rock is Igneous or Sedimentary rock changed by heat and pressure.Morph means "to change".