Metamorphic rocks
Definition.
Metamorphic rocks are rocks that form when rocks change.
How they change.
1. Heat.
Rocks deep inside the Earth get very hot.
Heat makes the particles rearrange.
The rock becomes harder.
2. Pressure.
Heavy rocks press from all sides.
Pressure squeezes the rock.
Minerals line up and form layers.
Properties.
Very hard and strong.
Can be layered.
Used in buildings and statues.
Example.
Marble.
Slate.
Gneiss.
Quartzite.
Fun Fact.
Quartzite is so hard that it can scratch glass.
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