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Plate tectonics Yes, the continents do move! (SC.7.E.6.5) Pre-assessment 1. Earth’s mantle plays an important role in plate tectonics. Why is the mantle so important to this process? A. B. C. D. Earthquakes occur constantly in the mantle, which causes the plates to move. The mantle is made up entirely of liquid rock, on which Earth’s crustal plates can float. Heavy metals in the mantle set up strong magnetic fields that attract and repel Earth’s plates. Temperature differences in the mantle set up convection currents that help to drive the movement of the plates. Pre-assessment 2. Two tectonic plates collide and one sinks beneath the other. What do you predict will form? A. volcanoes B. hurricanes C. abyssal plains D. mid-ocean ridges Brain Pop Movie: Plate tectonics 1. Layers of the Earth Crust Mantle (convection) Outer core (liquid) Inner core (solid) 2. Types of plate movement Divergent (sea floor spreading) Convergent (mountains) Transform (sliding) Alternative interactive BBC video Tectonic Plates – Discovery Education Skill Builder Use the menu on the right to explore Convergent Boundary Transform Boundary Divergent Boundary asdfasdfasSDF Identify the following as either a convergent, divergent or transform boundary! North American Plate and Eurasian Plates Indian and Eurasian Plates The San Andreas Fault Mid-Ocean ridges Mountains Divergent Boundary! Divergent Boundary! Convergent Boundary! Convergent Boundary! Transform Boundary! Dance of the Plates Discovery Education Exploration