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Earth’s Layers

Earth’s Layers. Inside the Earth. Composition of the Earth. The outer layer of the Earth in less dense than the inner layer. Three main layers of the Earth: crust, mantle, core. Cite: http://www.kidscosmos.org/kid-stuff/mars-trip-graphics/earth-interior-diagram.gif. Inside the Earth.

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Earth’s Layers

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  1. Earth’s Layers Spring 2006, Pflugerville ISD

  2. Inside the Earth Composition of the Earth The outer layer of the Earth in less dense than the inner layer. Three main layers of the Earth:crust, mantle, core. Cite: http://www.kidscosmos.org/kid-stuff/mars-trip-graphics/earth-interior-diagram.gif Spring 2006, Pflugerville ISD

  3. Inside the Earth The crust ranges from 5-100 km . Continental crust is made of light and less dense materials: silicon, oxygen and aluminum. Oceanic crust is made of heavy and more dense materials: iron, calcium, and magnesium. Spring 2006, Pflugerville ISD Cite: http://binky.thinkquest.nl/~ll125/images/struct.jpg

  4. Inside the Earth The mantle is between the crust and the core. It is very thick and has the most mass. We infer what the mantle looks like by looking at the surface of the Earth. The mantle is made of iron and magnesium. Cite: http://www.greatbasinnaturalhistory.org/Geology/Images/Mantle%20Convection.gif Spring 2006, Pflugerville ISD

  5. Inside the Earth The core begins at the bottom of the mantle and ends at the center. The core is made of iron, nickel , sulfur and oxygen. Cite: http://www.oup.co.uk/images/oxed/children/yoes/earth/earthcore.jpg Spring 2006, Pflugerville ISD

  6. Inside the Earth Five Main Layer of the Earth • Lithosphere • Asthenosphere • Mesosphere • Outer core • Inner core Spring 2006, Pflugerville ISD Cite: http://jersey.uoregon.edu/~mstrick/AskGeoMan/AskGeoImages/Earth.layers.image.gif

  7. Inside the Earth The lithosphereis the crust and the rigid upper part of the mantle. It is divided into pieces called plates. Spring 2006, Pflugerville ISD Cite:http://www.craigtutoring.com/earthscienceimages/lithosphere.gif

  8. Inside the Earth The asthenosphere is the soft layer on which the plates move. It is solid rock that flows very slowly. Cite: http://www.ucmp.berkeley.edu/geology/curr2.JPG Spring 2006, Pflugerville ISD

  9. Inside the Earth The mesosphere is the strong lower part of the mantle. Spring 2006, Pflugerville ISD Cite: http://courses.eas.ualberta.ca/eas421/images/diagrams/0108earth.gif

  10. Inside the Earth The outer core is the liquid layer that slowly circulates. Electrical currents within it generate the Earth’s magnetic field. Every 100,000years or so, the magnetic field reverses itself. Spring 2006, Pflugerville ISD Cite: http://news-service.stanford.edu/news/2002/april24/gifs/earth_350.jpg

  11. Inside the Earth The inner core is a solid, dense center. Temperature is around 4300 degrees Celsius. Scientist know this by recreating pressures like that of the core. Spring 2006, Pflugerville ISD Cite: http://www.phschool.com/atschool/science_activity_library/images/earths_interior.jpg

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