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The Earth’s Crust in Motion Name ___________________________ The crust of the earth, or lithosphere, is broken into a number of tectonic plates that float on the layer of the mantle called the asthenosphere. Because the plates are moving, the appearance of the world map actually changes over time. Over 200 million years ago all land masses were connected in a large body called Pangaea. As the plates continued to move, land masses pushed into each other, moved away from each other, and slid past each other. The plates continue to move today changing the appearance of Earth’s surface. Not all plates move in the same direction or at the same rate. Procedure: 1. Cut out the individual tectonic plates and assemble them into the current world map. Glue this world map to the back of your paper. 2. Use the provided key to label each of the plates. 3. Label each named tectonic plate with an arrow to show the direction it is moving and the velocity at which it is traveling. 4. Answer the analysis questions. Tectonic Plate Approximate Direction Approximate Velocity (cm/yr) African W 1.622 Antarctic SW 2.21 Arabian NW 2.236 Australian N 5.808 Caribbean W 3.03 Cocos NE 11.571 Eurasian W 2.252 Indian N 2.593 Juan de Fuca NE 10.446 Nazca E 3.586 North American W 4.114 Pacific NW 11.78 Phillippine NW 10.574 Scotia W 4.893 South American W 4.83 Map: Glue your map in the space provided. Analysis Questions: Answer with complete sentences. 1. Which tectonic plate is moving the fastest? Which tectonic plate is moving the slowest? 2. What type of boundary occurs between the South American and African plates? What type of land form is located there as a result of this boundary type? 3. What type of boundary is located between the Indian and Eurasian plates? What type of landform is located there as a result of this boundary type? 4. Where on the map can you see a transform boundary? What even would you expect to happen there?