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Name: __________________________ March 5, 2008 Genesis 17 Earth Science: Period: __ B Plate Tectonics WebQuest! Directions: Open the internet. Go the AHS website and click on “Staff Web Pages” on the lefthand column. Find Mr. Byers’ website and open the “Course Website” for FX/Earth Science. Click on “Class Documents” and you should find this Genesis uploaded. Go to the web addresses listed below and answer the questions that follow. Part I: Go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/intro.html 1.) Define plate tectonic theory. Plate tectonic theory is the theory that Earth’s outer layer ______________________ ________________________________________________________________________ 2.) What is another way of saying for “rift”? Another way of saying “rift” is _________________________________ 3.) In the rectangle, draw a sketch of the Earth with convection currents: 4.) List the four types of plate boundaries: Divergent Boundaries _____________ Boundaries _____________ Boundaries _____________ Boundaries Part II: Click on “Sea Floor Spread (Divergent Plate Boundary)” or go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/divergent.html 5.) Where is the Earth’s longest mountain chain? ________________________________ 6.) How long is it?! ____________________ miles long! 7.) Draw a diagram (with labels!) showing sea floor spreading in the rectangle below: 8.) At what rate does the Atlantic Ocean “grow” every year between North America and Europe? New ocean floor grows at about ___________ cm/year 9.) Where on Earth is the sea floor spreading much more rapidly? _______________________________________________ Part III: Click on “Continental Slide (Convergent Plate Boundary)” or go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/convergent.html 10.) Define “subduction”. Subduction = ___________________________ 11.) What landforms do convergent plate boundaries create? Deep ocean trenches and _______________________ ! Part IV: Click on “Continental Crush (continental-continental convergent boundary)” or go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/crush.html 12.) What is happening in the animation? ______________ are being formed! 13.) Think. Does this relate to where we live… how? Explain: _________________________ ______________________________________________________________________________ Part V: Click on “Slipin’ and Slidin’ (transform plate boundary)” or go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/transform.html 14.) What happens when two plates release built-up tension? __________________________ 15.) What is the most famous transform plate boundary? ____________________________ Part VI: Click on “Back to the first page of Plate Tectonics” or go to: http://www.pbs.org/wgbh/aso/tryit/tectonics/ 16.) Who first proposed the idea of continental drift? ______________________ When? ______ 17.) When was the theory generally accepted? ________________ Part VII: Go to: http://pubs.usgs.gov/publications/text/understanding.html 18.) Read this page carefully 19.) What is happening to Iceland? _________________________________________________ 20.) How did the Himalaya Mountains form? ________________________________________ ______________________________________________________________________________ 21.) Are they still forming? __________ Part VIII: Scroll to the top and clock on “Illustration of the Main Types of Plate Boundaries” or go to: http://pubs.usgs.gov/publications/text/Vigil.html 22.) Whoa!... Recreate this diagram in the rectangle below! (Make it your own, but include all the labels!) Labels! Color? 23.) At what type of plate boundaries do the following occur: a. Trenches: __________ boundaries b. Oceanic ridges: ___________ boundaries c. Island volcanoes: _________________ d. Continental volcanoes: _______________
