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==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]].
===About Igneous Rocks===
: When [[magma]] or [[lava]] [[freezing|freezes]] it is called an '''igneous''' rock.
: When the [[magma]] is trapped underground it [[freezing|freezes]] slowly and this makes very large [[cyrstalcrystal]]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 sharp interlocking [[extrusiveGrain (Rock)|grains]] rock.
===Examples===
|[[File:Diorite.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Granite]] is an [[igneous]] rock with large interlocking [[Grain (Rock)|grains]].| style="height:20px; width:200px; text-align:center;" |[[Gabbro]] is an [[intrusive]] [[igneous]] rock.| style="height:20px; width:200px; text-align:center;" |[[Diorite]] cools very slowly underground so it has large [[crystal]]s.
|}
|[[File:Pumice.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Basalt]] forms from [[lava]] so it is an [[extrusive]] [[igneous]] rock.| style="height:20px; width:200px; text-align:center;" |[[Obsidian]] is an [[igneous]] rock that cools so quickly that [[crystal]]s don't have any time to form at all.| style="height:20px; width:200px; text-align:center;" |[[Pumice]] bursts out of [[Volcano]]es and gives of [[gas]]es that make bubbles inside making it look like a sponge.
|}