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→Key Stage 3
==Key Stage 3==
===Meaning===
[[File:Diorite.png|right|300px|thumb|You can see the sharp interlocking grains of the [[igneous]] rock.]]
An [[igneous]] rock is a [[rock]] formed from [[magma]] or [[lava]].
: When the [[magma]] is trapped underground it [[freezing|freezes]] slowly and this makes very large [[cyrstal]]s in the rock. This is called [[intrustive]] rock.
: When the [[lava]] comes out of the [[volcano]] it cools down and [[freezing|freezes]] quickly making small [[crystal]]s. This is called [[extrusive]] rock.
: [[Igneous]] rocks have large sharp interlocking [[Grain (Rock)|grains]].
===Examples===