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1.0 The Restless Earth
1.1 Rock Types
Igneous: Formed from MAGMA. Very hard rock.
Intrusive- when magma cools slowly underground forming large crystals. Eg; Granite.
Extrusive- If the magma comes above ground, becomes lava and cools quickly, forming tiny crystals. Eg: Basalt.
Sedimentary: Formed when ERODED SEDIMENTS from dead plants, animals and rock particles build up in layers and become compressed. Eg...