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Earth’s Layers

Earth’s Layers. Pages C6-11. Earth’s Layers. Crust-where we walk Mantle-thickest layer, made mostly of solid rock Core (Outer and Inner) – deep inside the earth, made of iron and nickel. How deep are the layers?. Crust: 3-43 miles deep Mantle: about 1,790 miles deep

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Earth’s Layers

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  1. Earth’s Layers Pages C6-11

  2. Earth’s Layers • Crust-where we walk • Mantle-thickest layer, made mostly of solid rock • Core (Outer and Inner) – deep inside the earth, made of iron and nickel

  3. How deep are the layers? • Crust: 3-43 miles deep • Mantle: about 1,790 miles deep • Outer Core: about 1,410 miles deep • Inner Core: about 750 miles deep

  4. Which layer is the hottest? • Inner Core-may be as hot as the sun

  5. What are Plates? • Continent-sized slabs that make up the crust and the mantle • Plates are constantly moving, very slowly

  6. Plates Move: • Away from each other • Toward each other • Past each other

  7. When Plates Move Together • Mountains or Volcanoes are formed

  8. When Plates Move Past Each Other • Earthquakes occur

  9. Railroad tracks after an earthquake.

  10. For Discussion • What are the three layers of the earth? • Crust, Mantle, Core • On which layer do we live? • Crust

  11. Which is the thickest layer? • Mantle • Which layer is the hottest? • Inner Core

  12. How often do earth’s plates move? • They are in constant motion. • At what speed do they move? • Slowly (only a few centimeters per year)

  13. What is formed when plates move together? • Mountains and Volcanoes • What happens when plates slide past each other? • Earthquakes occur.

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