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EARTH SCIENCE PHET: PLATE TECTONICS NAME: PER: DATE: Into any search engine or the URL box at the top type in “Plate Tectonics Simulation”. Run the simulation. Spend a few minutes exploring the simulation. Don’t worry, you can’t break it. NEXT: Select the “Crust” tab at the top of the simulation. Under view select “Both”. 1) What are the 3 variables that can be changed in this simulation? (Scale or zoom is a nice feature, but not a variable.) Q2 – Continental Crust 2) Try to duplicate the continental crust as accurately as possible. Be sure you have selected “Both” for density and temperature. Show on the diagram ON THE RIGHT where you set each variable. (In other words, draw where you must move the slides.) 3) Try to duplicate the oceanic crust as accurately as possible. Show on the diagram ON THE RIGHT where you set each variable. Q3 – Oceanic Crust 4) In terms of the ALL THREE variables you have investigated, describe how continental crust differs from oceanic crust. ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ NEXT: Select the “Plate Motion” tab at the top of the screen. Under view select “Both”. I also suggest using automated mode and “Show Labels”. 8) Investigate convergent boundaries (GREEN ARROWS). Report your findings in the following table. To use the DENSITY METER you drag it around the screen. You must make sure the POINTER IS IN EXACTLY THE MIDDLE OF THE CRUST. This is most difficult with Oceanic Crust because it is very thin! Left Side Crust Right Side Crust Continental Continental Continental Old Ocean Continental Old Ocean Continental Young Ocean Old Ocean Young Ocean Young Ocean Continental Young Ocean Old Ocean Which Crust is Denser? Which Crust Subducts? Do nonvolcanic Mountains Form? Does a Trench Form? On Which Crust Do Volcanoes Form? 9) Describe the relative motion of the plates at ALL convergent plate boundaries. ____________________ ____________________________________________________________________________________ 10) Three times you used the same two types of crust, but switched left and right sides. What do you observe about the results? Is the side the crust is placed on important? ____________________________________________________________________________________ ____________________________________________________________________________________ 11) Look for patterns in density, subduction, and volcanoes in the table. a) When a plate subducts what is always true about the density of the plate that subducts compared to the plate it subducts under? ______________________________________________________________________________ b) When volcanoes form, on which plate do they always form? ________________________________________________________________________________ _________________________________________________________________________________ 12) Explore how a continental-young oceanic crust collision differs from a continental-old oceanic crust collision. Describe the difference in the angle of subduction between old and new plates. ______________________________________________________________________________ ______________________________________________________________________________ How does the distance between the volcanoes and the plate boundary differ between old and new plates? ________________________________________________________________________ ______________________________________________________________________________ 13) Investigate divergent boundaries (red arrows). Click show labels. Describe the relative motion of ALL plates at divergent boundaries. ______________________________________________________ ____________________________________________________________________________________ 14) What is generated at ALL divergent plate boundaries? ____________________________________ ____________________________________________________________________________________ 15) Investigate transform fault boundaries (blue arrows). Describe the relative motion of ALL plates at transform fault boundaries.______________________________________________________________ ____________________________________________________________________________________