Difference between revisions of "Igneous"
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===About Igneous Rocks=== | ===About Igneous Rocks=== | ||
: When [[magma]] or [[lava]] [[freezing|freezes]] it is called an '''igneous''' rock. | : 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 [[cyrstal]]s in the rock. | + | : 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. | + | : When the [[lava]] comes out of the [[volcano]] it cools down and [[freezing|freezes]] quickly making small [[crystal]]s. This is called [[extrusive]] rock. |
===Examples=== | ===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]] cools very slowly underground so it has large [[crystal]]s. | ||
| + | | style="height:20px; width:200px; text-align:center;" |[[Diorite]] is an [[intrusive]] [[igneous]] rock. | ||
| + | |} | ||
| + | |||
| + | {| 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. | ||
| + | |} | ||
Revision as of 09:38, 3 October 2018
Key Stage 3
Meaning
An igneous rock is a rock formed from magma or lava.
About Igneous Rocks
- When magma or lava freezes it is called an igneous rock.
- When the magma is trapped underground it freezes slowly and this makes very large cyrstals in the rock. This is called intrustive rock.
- When the lava comes out of the volcano it cools down and freezes quickly making small crystals. This is called extrusive rock.
Examples
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| Granite is an igneous rock with large interlocking grains. | Gabbro cools very slowly underground so it has large crystals. | Diorite is an intrusive igneous rock. |
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| Basalt forms from lava so it is an extrusive igneous rock. | Obsidian is an igneous rock that cools so quickly that crystals don't have any time to form at all. | Pumice bursts out of Volcanoes and gives of gases that make bubbles inside making it look like a sponge. |