Layers of the Earth Kim Lachler 2010 NCES 6.E.1.3

Density Before talking about the layers of the earth it is important to understand density. Before talking about the layers of the earth it is important to understand density.

Density Density = Mass/Volume Density = Mass/Volume Coke/diet coke demoCoke/diet coke demo Both cans have the same volume. Both cans have the same volume. Why did the coke sink and the diet float? Why did the coke sink and the diet float? Coke has more sugar, therefore more mass per volume.Coke has more sugar, therefore more mass per volume.

There are 2 different models to show the layers of the Earth. The_Inner_Structure_of_the_Earth.mov The_Inner_Structure_of_the_Earth.mov 1) Composition -It is based on the compounds of the Earth. In other words, what they are made of. 2) Physical Structure - It is based on the physical properties. In other - It is based on the physical properties. In other words, what it is like. words, what it is like.

Composition Layers Crust Mantle Core

Composition Layers The crust The crust Outer most layerOuter most layer Thinnest layerThinnest layer km thick ( the ocean or a mountain) km thick ( the ocean or a mountain) Less than 1% of the Earths massLess than 1% of the Earths mass

Composition Layers Oceanic crust Oceanic crust DenserDenser Consist mainly of the elements iron, calcium, and magnesium.Consist mainly of the elements iron, calcium, and magnesium. Continental crust Continental crust Less denseLess dense Consist mainly of oxygen, silicon, and aluminum.Consist mainly of oxygen, silicon, and aluminum.

Composition Layers The mantle The mantle Denser then the crustDenser then the crust Contains more magnesiumContains more magnesium 2,900 km thick2,900 km thick Makes up 67% of the Earths massMakes up 67% of the Earths mass

Composition Layers Core Core Center of the EarthCenter of the Earth DenserDenser Containing Iron and NickelContaining Iron and Nickel 3,430 km thick3,430 km thick 33% of the Earths mass33% of the Earths mass

Physical Layers lithosphere asthensphere mesosphere outer core inner core

Physical Layers Lithosphere Lithosphere Rigid layerRigid layer Outer most layerOuter most layer 15 – 300 km thick15 – 300 km thick Consists of the crust and the outer most part of the mantleConsists of the crust and the outer most part of the mantle Divided into pieces (tectonic plates)Divided into pieces (tectonic plates)

Physical Layers Asthenosphere Asthenosphere Solid rockSolid rock 250 km thick250 km thick Plastic layer of the mantlePlastic layer of the mantle What the lithosphere moves onWhat the lithosphere moves on

Physical Layers Mesosphere Mesosphere StrongerStronger Lower portion of the mantleLower portion of the mantle 2550 km thick2550 km thick

Physical Layers Outer Core Outer Core LiquidLiquid Melted Iron and NickelMelted Iron and Nickel 2,200 km thick2,200 km thick

Physical Layers Inner Core Inner Core SolidSolid Consist of Iron and NickelConsist of Iron and Nickel 1,230 km thick1,230 km thick Hottest layerHottest layer If it is hotter than the outer core than why is it not liquid like the outer core? If it is hotter than the outer core than why is it not liquid like the outer core? Too much pressure!!!!!!Too much pressure!!!!!!

Bibliography Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Orlando, Fl, 2005 Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Orlando, Fl, 2005 Google Images, Layers of the Earth ages&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai= accessed 9/26/2010 Google Images, Layers of the Earth ages&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai= accessed 9/26/ ages&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai ages&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai