A Plate Tectonics Webquest Directions: Go to the websites listed below. Answer the questions and fill in the blanks that correspond with each website. Websites: Site 1: http://www.enchantedlearning.com/subjects/astronomy/planets/earth /Continents.shtml Site 2: http://www.learner.org/interactives/dynamicearth/plate.html Site 3: http://earthquake.usgs.gov/eqcenter/recenteqsww/ Site 4: http://www.classzone.com/books/earth_science/terc/content/investigations/e s1001/es1001page02.cfm Site 5: http://www.tasagraphicarts.com/activities/Plates.html Site 1 Information: Watch the animated continental drift image and make note of how the continents have moved over time!! 1. How many major plates are there? 2. List the names of the major tectonic plates. 3. The theory of plate tectonics explains the movement of Earth’s ____________________ and also explains the causes of _______________________________, ___________________________________, ________________________________, ___________________________________, and many other geologic phenomenon. 4. What is the estimated speed at which plates move annually? 5. Where does most of the Earth’s seismic activity occur? 6. The top layer of the Earth’s surface is called the ___________________ 7. Which type of crust is denser? continental crust (circle one) oceanic crust or A Plate Tectonics Webquest 8. Draw an illustration of the outer layers of the Earth. Label the following: oceanic crust, continental crust, mantle, lithosphere, asthenosphere. Types of Plate Movements – fill in the information from Website 1 to complete the notes on plate movements. Divergent Plate Movement 9. “_____________________________________________ is the movement of two oceanic plates away from each other (at a _________________________ plate boundary), which results in the formation of new __________________________________________ … along a mid-ocean ______________________. Where the oceanic plates are moving away from each other is called a _____________________________________.” Convergent Plate Movement 10. “When two plates collide (at a ____________________________ plate boundary), some crust is destroyed in the impact and the plates become _______________________. The results differ, depending upon what types of plates are involved.” 11. Describe what happens when an oceanic plate collides with a continental plate. 12. Describe what happens when two oceanic plates collide. 13. Describe what happens when two continental plates collide. Lateral Slipping Plate Movement A Plate Tectonics Webquest 14. “When two plates move sideways against each other (at a ________________________plate boundary), there is a tremendous amount of friction which makes the movement jerky. The plates slip, then stick as the friction and pressure build up to incredible levels. When the pressure is released suddenly, and the plates suddenly jerk apart, this is an ________________________________.” Site 2 Information: 15. Use arrows to draw an illustration of how plates move at a convergent boundary. List two examples of convergent plate boundaries. 16. Use arrows to draw an illustration of how plates move at a divergent boundary. List two examples of divergent plate boundaries. 17. Use arrows to draw an illustration of how plates move at a transform boundary. List two examples of transform plate boundaries. 18. Click on the Plates and Boundaries Challenge. See how many plates and boundary types you can label correctly. Site 3 Information: 19. What is the time and number of earthquakes recorded on this map? Time_______________________________ Number of earthquakes_____________ 20. How many earthquakes have occurred within the last hour? 21. Click on the United States on the map. How many earthquakes have occurred in the U.S. in the last hour, and day? A Plate Tectonics Webquest Hour______________________ Day__________________________ 22. Where do most of the earthquakes occur in the U.S.? Site 4 Information Answer the questions that are in blue on each slide. 1. 2. 3. 4. 5. 6. 7. 8. 9. Site 5: If time permits – go to site # 5 and quiz yourself. See if you can put the plates in the correct position.