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The Rock Cycle by Isabella Schulte

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kelly schulte

on 16 February 2015

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Transcript of The Rock Cycle by Isabella Schulte

Tuesday, February 17, 2015
Metamorphic Rock forms when high temperature and pressure change the texture and mineral content of rock. For example, a rock could be buried where the temperature, pressure or a chemical process is high. Over millions of years, the solid rock changes. Gneiss is an example of a metamorphic rock that is made up of bands of light and dark minerals.
Granite is a type of Igneous Rock. Our kitchen counter is made of granite. Igneous Rock forms when magma or lava cools and hardens to become solid. The longer the cooling takes, the more time the crystals have to grow. Granite that cools slowly makes larger crystals.
A rock may seem like it is going to stay in one place and never change. But, over millions of years, any of the three types of rocks can be changed into one of the other types. When a rock changes from one type to another, it is call the rock cycle.
WEATHERING: water, wind, ice and changes in temperature
EROSION: sediment is moved from on place to another
DEPOSITION: process by which sediment comes to rest
TEMPERATURE: magma, lava, and new rocks are formed
PRESSURE: buried rocks can be squeezed by layers of rock on top
Sedimentary Rock is a composite of mineral formed from solutions or sediments from older rocks. Sedimentary rock forms when the weight from pressure above presses down on layers of minerals or sediment, or when mineral dissolved in water solidify between sediment pieces and cement them together. They are named after sediments that make them up. Sandstone and limestone are two examples.
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