The Earth's Inner Layers

By Gabe Smith

The Crust

The temperature is whatever the air temperature is.

The crust is on the top of the earth.

The thickness is 5-30 km.

The Sub-layers are the Oceanic crust and Continental crust.

Three Facts about the crust is that people have only dug two miles into the crust, but the biggest cave is 5 miles into the crust. It is the first layer of the earth. It is a solid shell around the earth.

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The Mantle

The temperature is about 1,000 C.

The depth is 30 km.

The thickness is 3,500 km.

The two Sub-layers are the Asthenosphere and Lithosphere.

Three Facts are that the mantle is the Second layer of the earth. It takes up 84% of the earth. Made from iron and magnesium.

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The Core

The temperature is 6,000 C.

The core is about 3,530 km deep.

The thickness of the core is 2,900 km.

The Sub-layers are the Outer core and Inner core.

Three Facts About the Earth's core: The core is the deepest layer of the earth. Inner core is solid. Outer core is solid but flows.

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Convection in the Mantle

convection currents are when the core heats up the mantle so the molecules spread apart and its not as dense which causes it to rise. When it gets to the top it slowly pushes the tectonic plates apart. It cools down and gets dense so it falls back down and starts the cycle over again.
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Follow up Questions

I also want to learn about how far you can go into the earth with out getting to hot.

Citations

interactives dynamic earth. (2014). Retrieved November 3, 2014, from Annenburg foundation
website: http://www.learner.org/interactives/dynamicearth/structure.html

layers of the earth. (2014). Retrieved November 3, 2014, from coolmath.com website: http://www.sciencemonster.com/earth-science/layers-of-the-earth.htm