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Published byNoah Rodger Hopkins Modified over 9 years ago
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Changing Nature of Earth Mr. Lin Image Courtesy of http://www.spacetoday.org/images/SolSys/Earth/EarthBlueMarbleWestTerra.jpg
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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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Theory of Continental Drift Image Courtesy of http://www3.bc.sympatico.ca/Moon/earths.gif
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Image Courtesy of http://geology.com/pangea- continental-drift.gif
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Theory of Continental Drift Image Courtesy of http://www.noc.soton.ac.uk/gg/classroom@sea/carlsberg/images/plate_history_lge.jpg
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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
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How Do the Continents Move?
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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
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Plates Image Courtesy of http://www.dkimages.com/discover/previews/1244/597340.JPG
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Plates Image Courtesy of http://www.windows.ucar.edu/earth/images/earth_plates_usgs_L.jpg
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Plate Tectonics Show Video on Plate Tectonics
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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
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Convergent Plates
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Mountains like Mt. Everest are built by Convergent Plates
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Divergent Plates
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Transformational
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Mwwwaaa hahahahA HAHAH!!! So What Moves the Plates? (Let’s first investigate the layers of the EARTH)
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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
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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
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Layers of the Earth Image Courtesy of http://volcano.und.edu/vwdocs/vwlessons/lessons/Earths_layers/Earths_layers3.html
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