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. Image Courtesy of http://upload.wikimedia.org/wikipedia/common s/6/65/Pangaea.png PANGAEA

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_imag e/convergent-boundary-oceanic-continental-still.gif

13. Convergent Plates

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

15. Divergent Plates

16. Transformational

17. Mwwwaaa hahahahA HAHAH!!! 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/image s/artikel/abb10_gross.jpg

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

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