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Layers of the Earth

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. Density. Density = Mass/Volume Coke/diet coke demo Both cans have the same volume. Why did the coke sink and the diet float?

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Layers of the Earth

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

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

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

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

  5. Composition Layers Crust Mantle Core

  6. CompositionLayers • The crust • Outer most layer • Thinnest layer • 5 -100 km thick ( the ocean or a mountain) • Less than 1% of the Earth’s mass

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

  8. Composition Layers • The mantle • Denser then the crust • Contains more magnesium • 2,900 km thick • Makes up 67% of the Earth’s mass

  9. Composition Layers • Core • Center of the Earth • Denser • Containing Iron and Nickel • 3,430 km thick • 33% of the Earth’s mass

  10. Physical Layers lithosphere asthensphere mesosphere outer core inner core

  11. Physical Layers • Lithosphere • Rigid layer • Outer most layer • 15 – 300 km thick • Consists of the crust and the outer most part of the mantle • Divided into pieces (tectonic plates)

  12. Physical Layers • Asthenosphere • Solid rock • 250 km thick • Plastic layer of the mantle • What the lithosphere moves on

  13. Physical Layers • Mesosphere • Stronger • Lower portion of the mantle • 2550 km thick

  14. PhysicalLayers • Outer Core • Liquid • Melted Iron and Nickel • 2,200 km thick

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

  16. Bibliography • Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Orlando, Fl, 2005 • Google Images , Layers of the Earth http://www.google.com/images?hl=en&source=imghp&q=layers+of+the+earth&btnG=Search+Images&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai= accessed 9/26/2010

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