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Earth Science: Earth’s interior

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Earth's layers from Friday 10/22/10 and Monday 10/25/10 notes.

Earth's layers from Friday 10/22/10 and Monday 10/25/10 notes.

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Earth Science: Earth’s interior Earth Science: Earth’s interior Presentation Transcript

  • Earth’s Interior Ch 2, Lesson 3
  • Layers
    • Earth’s interior is made up of layers.
    • Each layer has a different composition, pressure, and temperature.
  • Seismic Waves
    • Scientist learned about the Earth’s layers using seismic waves from earthquakes.
    • Wave’s speed and direction change when going through different materials (solid rock, liquid rock, solid metal, liquid metal)
  • Crust
    • Thin, rocky, outer layer of Earth.
      • Two types:
        • Continental crust (continents or land)
        • Oceanic crust (under the ocean)
  •  
  • Lithosphere
    • The crust and the solid uppermost layer of the mantle.
  •  
  • Asthenosphere
    • Heated rock under the crust.
      • Rock is heated so much it acts like playdough.
  •  
  • Mantle
    • The thick middle layer of Earth
      • Composed of rock
  •  
  • The Outer Core
    • A layer of melted metal (iron and nickel)
    • Denser than the mantle
  •  
  • The Outer Core
    • Solid ball of iron.
    • Earth’s densest layer.
    • Temperature comparable to the surface of the sun!
  •