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Earth's Composition

Published on Nov 18, 2015

This PowerPoint will tell you about Earth's layers and composition.

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1.

EARTH'S COMPOSITION

BY: POLLY MEDLIN
Photo by woodleywonderworks
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LAYERS

Photo by BlatantWorld.com
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Earth has four main layers. The four layers are the crust, mantle, outer core, and inner core.

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CRUST

Photo by trudeau
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The crust is a layer of rock that forms Earth's outer skin. The crust is right above the mantle, and is the coolest layer in temperature. Crust has two main rocks that make it up, basalt and granite. Basalt make up most of the oceanic crust. Granite makes up most of the continental crust.

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MANTLE

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The mantle is the second layer in the Earth. It is hot,dense, and semi-solid. The mantle lies between the crust and the outer core. The mantle also has a lithosphere and an asthenosphere.

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OUTER CORE

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The outer core is the third main layer of the Earth. It is made up of mostly iron and nickel. The iron and nickel is melted into a type of molten lava, which makes the outer core very hot.

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INNER CORE

Photo by Argonne National Laboratory
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The inner core is the fourth main layer of the Earth. It inner core is very hot, although it happens to be solid. It is known to be as hot as the center of the sun.

Polly Medlin