This is for school so it is important.
The Igneous rocks are formed by heat and pressure and then are out of the volcano and it becomes an Igneous rock, it is pretty much cooled magma/lava. It forms inside a volcano then out side. It is the darkest rock you can find.
Metamorphic rocks are formed by pressure their is other rocks that melt into it but also gets pressed into it. it forms in the mantle and then comes out into the crust. This is the only other rock that contains a lot of other rocks in it beside meters.
The sedimentary is the most common rock because it is above ground
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