A ==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 [[crystal]]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 [[Grain (Rock)|grains]]. ===Examples==={| class="wikitable"|+ Intrusive Igneous Rocks|-|[[File:Granite.png|center|200px]]|[[File:Gabbro.png|center|200px]]|[[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.|} {| class="wikitable"|+ Extrusive Igneous Rocks|-|[[File:Basalt.png|center|200px]]|[[File:Obsidian.png|center|200px]]|[[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.|}