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Layers of the Earth

http:// www.youtube.com/watch?v=Q9j1xGaxYzY. Layers of the Earth. 8-3.1 Summarize the three layers of Earth – crust, mantle, and core – on the basis of relative position, density, and composition . TERMS. Crust Mantle Core Density Composition Lithosphere Asthenosphere

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Layers of the Earth

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  1. http://www.youtube.com/watch?v=Q9j1xGaxYzY Layers of the Earth 8-3.1 Summarize the three layers of Earth – crust, mantle, and core – on the basis of relative position, density, and composition.

  2. TERMS • Crust • Mantle • Core • Density • Composition • Lithosphere • Asthenosphere • Oceanic crust – basalt • Continental crust - granite

  3. Essential Information • The Earth has layers that have specific conditions (states) and composition (made up of).

  4. Summary of Earth’s Layers

  5. Summary of Earth’s Layers Copy Table into Notebook

  6. Summary of Earth’s Layers Copy Table into Notebook

  7. Summary of Earth’s Layers Copy Table into Notebook

  8. Summary of Earth’s Layers Copy Table into Notebook

  9. Summary of Earth’s Layers Copy Table into Notebook

  10. Summary of Earth’s Layers Copy Table into Notebook

  11. Summary of Earth’s Layers Copy Table into Notebook

  12. How can you use your hands to remember the layers of the Earth?

  13. Middle layer, thickest layer; top portion called the asthenosphere

  14. Heaviest material; most dense layer

  15. Density increases with depth because of increasing pressure

  16. Least dense layer overall; Oceanic crust (basalt) is more dense than continental crust (granite)

  17. Hot softened rock; contains iron and magnesium

  18. Solid Rock – mostly silicon and oxygen • Oceanicbasalt • Continental granite

  19. Mostly iron and nickel; outer slow flowing liquid, inner part, solid

  20. The lithosphere is a "rocky“ rigidoutermost shell of a rocky planet. On Earth, it comprises the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or more.

  21. Asthenosphere - is a portion of the upper mantle just below the lithosphere that is involved in plate tectonic movements. The asthenosphere is a highly viscous, mechanically weak deforming region, but pressures keeps it like a thick soupy plastic. The Asthenosphere has a relatively low density so Seismic waves pass relatively slowly through the asthenosphere compared to the overlying lithosphere.

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