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Where Do Rocks Come From?

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by

Shane Tatman

on 24 September 2015

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Transcript of Where Do Rocks Come From?

Where Do Rocks Come From?
The Rock Cycle
All Rocks Come From the Earth
The Earth has three main parts:
1. Core: This is the center of the Earth and it is made of metal
2. Mantle: The mantle is comprised of rocks so hot that they are melted. This causes them to flow like toothpaste.
3. Crust: This is the hard outer layer of the Earth. it is made of solid rock.
GOAL!
1. Weathering forms Sedimentary Rocks
2. Heat and Pressure forms Metamorphic Rock
3. Melting forms Igneous Rocks
Any kind of rock can change into any other kind of rock. It just might take a long, long time. This is the rock cycle!
The Layers of the Earth
Types of Rocks:
Metamorphic
Meta
- means change.
Morph
- means shape or form. Metamorphic rocks change from one kind of rock into another kind of rock. The rocks change because of great heat (by being near or touching hot lava) and pressure (buried deep in the Earth's crust).
Types of Rocks:
Igneous
There are three types of rocks:
1. Igneous: These start out as melted rock in the Earth's mantle as magma, and then comes to the surface in volcanoes as lava.
Cool Rock Cycle Movie
Types of Rock: Sedimentary
Sedimentary rock form from bits and pieces of recycled rock. Rocks are broken through the process of weathering (wind, water, ice), moved down river and streams through the process of erosion, and then build up in layers called sediment.
The Rock Cycle
A Fun and Informative Rock Cycle Video
Full transcript