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The Rock Cycle

This Prezi describes how the rocks are formed, and re-created into other different rocks.
by

Jotham Chow

on 29 April 2010

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Transcript of The Rock Cycle

The Rock Cycle So let's start with Sediments In a cycle everything is connected There is no end And there is no start Sediment What is sediment? Some Examples Sand Boulders Gravel Clay Mud Just add some Pressure What makes sediment into a rock? Sediment builds up along rivers and Seas and lakes Sediment is an earthly matter Then they build up so much that they pressurize the sediment at the bottom And turns them into ROCK From this point it can go two ways And the other is into a Metamorphic Rock One is it turns back into sediment With some precipitation And some wearing down Metamorphic Rocks These rocks are rocks that come from igneous and sedimentary rocks They've been changed so much, that they've turned into another rock. How? These little rocks get sucked beneath the earth Then there's the heat And there's the pressure With these two things combined, they change From here, it can go two ways One is into sediment With some weathering And precipitation The other is into magma Magma Magma is a hot substance found within the earth When the metamophic rocks are given even more heat then when they change, they will melt Melt into magma Igneous Rocks There are two types of igneous rocks The other is extrusive One is intrusive The other is extrusive When magma cools it will turn into a rock An igneous rock The intrusive is where magma inside the earth cools and turns to rock The extrusive is where the magma spews outside of the earth Through volcanoes And then they cool down and turn into a rock The intrusive igneous rocks cool slower While the extrusive igneous rocks cool faster If the rock cools faster, it would look nice and shiny. From here it can go 3 ways One is into magma again With some more melting Another is into a metamorphic rock With some heat and pressure And last but not least into sediment With some wearing down and precipitation. Some characteristics of sedimentary rocks are Soft, breaks easier than the other two types of rocks They have many layers You can see lots of tiny pieces of sediment Characteristics of Metamorphic rocks There might be spaces inside the rock If it cools quickly, it will look shiny Characteristics of Igneous Rocks They have nice wavy patter They might have shiny bits on them Or they can look shiny for extreusive rocks With some heat and pressure Which takes us back to Sediment
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