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Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
Earth’s layers
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Earth’s layers

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Transcript

  • 1. Earth’s Layers
  • 2. Crust Outer most layer Thinnest 5 to 100 kilometer (km) thick Temperatures range from 0° C to 1000°C
  • 3. Crust Composition: mostly silicon, oxygen, sodium, small amounts of magnesium, potassium, and iron.
  • 4. Crust “Two Types”Continental Crust Thickestup to 100 km at mountains Most abundant rock is granite
  • 5.  Oceanic Crust Asthin as 5 km Most abundant rock is basalt Density averages 3g per cm³
  • 6. Crust/MantleMohorovicic Discontinuity (Moho): Transitionboundary between the crust and mantle
  • 7. Crust/MantleMohorovicic Discontinuity (Moho): This boundary marks a significant change in chemical composition.
  • 8. Mantle 67% of Earth’s mass 2,900 km thick Temperature ranges from 1000° C to 3700 ° C
  • 9. MantleDensity averages from 4.3g to 5.4g per cm³Composition: mostly silicon, oxygen, magnesium, and iron
  • 10. Mantle Convection currents occur here
  • 11. MantleDivided into 3 layers: 1. Lithosphere 2. Asthenosphere 3. Mesophere
  • 12. Mantle Lithosphere: 10 to 300 km thick Solid and made up of crust and mantle material VERY rigid Divided into sections called plates
  • 13. MantleAsthenosphere 250 km thick Soft layer that allows plates to shift
  • 14. MantleMesosphere 2550km thick Lower part of the mantle
  • 15. CoreDivided into 2 layers: 1. Outer Core 2. Inner Core
  • 16. CoreOuter Core Liquid 2200 km thick
  • 17. CoreOuter Core: Composition: Iron and Nickel, 10% sulfur and oxygen
  • 18. CoreOuter Core: Density: 10g to 12g per cm³ Temperature: 4000° to 5000° C
  • 19. CoreInner Core: Solid 1230 km thick About 6380 km beneath Earth’s surface
  • 20. Core Inner Core: Composition: Iron and Nickel Density: 15 g per cm³ Temperature: 5000° to 6000° C
  • 21. Earth’s Layers Scientistsuse indirect methods to gain information and knowledge of Earth’s interior (example: earthquakes).
  • 22. Earth’s Layers Seismic waves from earthquakes travel at different speeds depending on the density and composition of the ground they move through.
  • 23. Earth’s LayersScientists are able to take this information and learn about the interior of Earth.

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