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Earth Science: Earth’s interior
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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.

Published in: Technology, Business
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Transcript

  • 1. Earth’s Interior Ch 2, Lesson 3
  • 2. Layers • Earth’s interior is made up of layers. • Each layer has a different composition, pressure, and temperature.
  • 3. 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)
  • 4. Crust • Thin, rocky, outer layer of Earth. – Two types: • Continental crust (continents or land) • Oceanic crust (under the ocean)
  • 5. Lithosphere • The crust and the solid uppermost layer of the mantle.
  • 6. Asthenosphere • Heated rock under the crust. – Rock is heated so much it acts like playdough.
  • 7. Mantle • The thick middle layer of Earth – Composed of rock
  • 8. The Outer Core • A layer of melted metal (iron and nickel) • Denser than the mantle
  • 9. The Outer Core • Solid ball of iron. • Earth’s densest layer. • Temperature comparable to the surface of the sun!

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