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===Structure of Earth===
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|[[File:EarthStructure.png|center|500px]]
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| style="height:20px; width:200px; text-align:center;" |A [[diagram]] showing the layers of the [[Earth]].
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*[[Crust]]: The top layer of the [[Earth]] is called the [[Crust]]. It is made of [[rock]]s but two thirds is covered in a layer of [[water]].
*[[Mantle]]: The layer under the [[Crust]] is called the [[Mantle]]. It is made of [[rock]] that is under such a high [[pressure]] that it behaves [[Plastic (Property)|plastically]].
*[[Outer Core]]: The [[Outer Core]] is a [[liquid]] layer below the [[Mantle]].
*[[Inner Core]]: Underneath the [[Outer Core]] is the [[Inner Core]] at the very centre of [[Earth]]. It is a [[solid]] [[sphere]].
===Composition of Earth===
The different layers of [[Earth]] are made of different materials.
*[[Crust]] - The most common chemical elements in the [[Crust]] are [[Oxygen]] (46.6%), [[Silicon]] (27.7%), [[Aluminum]] (8.1%), [[Iron]] (5.0%), [[Calcium]] (3.6%).
*[[Mantle]] - The [[Mantle]] is mostly made of [[Silicate]] [[rock]]s.
*[[Outer Core]] - The [[Outer Core]] is mostly made of [[liquid]] [[Iron]] and [[Nickle]].
*[[Inner Core]] - The [[Inner Core]] is mostly made of [[solid]] [[Iron]] and [[Nickle]].
===Earth's Atmosphere===