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Changing Nature of Earth

Changing Nature of Earth. Mr. Lin. Image Courtesy of http://www.spacetoday.org/images/SolSys/Earth/EarthBlueMarbleWestTerra.jpg. Look at the World Map. It looks like a puzzle. Can anyone tell me why?. Image Courtesy of http://www.tlrp.org/international/images/world.gif.

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Changing Nature of Earth

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  1. Changing Nature of Earth Mr. Lin Image Courtesy of http://www.spacetoday.org/images/SolSys/Earth/EarthBlueMarbleWestTerra.jpg

  2. Look at the World Map. It looks like a puzzle. Can anyone tell me why? Image Courtesy of http://www.tlrp.org/international/images/world.gif

  3. Theory of Continental Drift Image Courtesy of http://www3.bc.sympatico.ca/Moon/earths.gif

  4. Image Courtesy of http://geology.com/pangea-continental-drift.gif

  5. Theory of Continental Drift Image Courtesy of http://www.noc.soton.ac.uk/gg/classroom@sea/carlsberg/images/plate_history_lge.jpg

  6. Theory of Continental Drift • A Theory that all the continents on Earth were originally a part of one large super-continent called Pangaea. • Plates on the Earth’s Crust have since moved parts of Pangaea away from each other. PANGAEA Image Courtesy of http://upload.wikimedia.org/wikipedia/commons/6/65/Pangaea.png

  7. How Do the Continents Move?

  8. Plate Tectonics • The Earth’s surface (called the Crust) is cracked into large “plates” • These plates float on the molten rock under the crust. Image Courtesy of http://www.gsi.ie/NR/rdonlyres/A3B07F5E-D9BB-4026-908D-DEB9B0217EA6/0/earth_cut.jpg

  9. Plates Image Courtesy of http://www.dkimages.com/discover/previews/1244/597340.JPG

  10. Plates Image Courtesy of http://www.windows.ucar.edu/earth/images/earth_plates_usgs_L.jpg

  11. Plate Tectonics Show Video on Plate Tectonics

  12. Plate Tectonics • When Plates are next to each other, they can move in three main ways: • Away from each other • Divergent • Into each other • Convergent • By sliding • Transformational Image Courtesy of http://geothai.net/2008/images/stories/article_image/convergent-boundary-oceanic-continental-still.gif

  13. Convergent Plates

  14. Convergent Plates Mountains like Mt. Everest are built by Convergent Plates

  15. Divergent Plates

  16. Transformational

  17. MwwwaaahahahahAHAHAH!!! So What Moves the Plates? (Let’s first investigate the layers of the EARTH)

  18. Layers of the Earth • Crust: Solid rock • Mantle: Melted rock • Outer Core: Melted metal • Inner Core: Solid Metal Image Courtesy of http://www.mgm.monschau.de/seismic/images/artikel/abb10_gross.jpg

  19. Mantle: 1,800 miles thick. Made of magma Outer Core: 1,400 miles thick. Made of liquid nickel and iron Crust: 3-5 miles thick. Made of rocks Inner Core: 800 miles thick. Made of solid nickel and iron

  20. Layers of the Earth Image Courtesy of http://volcano.und.edu/vwdocs/vwlessons/lessons/Earths_layers/Earths_layers3.html

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