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Understanding Plate Tectonics: Earth's Dynamic Crust and Its Boundaries

Dive into the fascinating world of plate tectonics, where the Earth’s crust, known as the lithosphere, is divided into tectonic plates resembling jigsaw puzzle pieces. Discover how these plates interact at three types of boundaries: divergent, convergent, and transform, each shaping our planet's landscape. Explore seafloor spreading at the Mid-Ocean Ridge, mountain formation in Hawaii, and the transformative actions at California's San Andreas Fault. Engage in hands-on activities to simulate Earth's surface changes and solidify your understanding of these powerful geological processes.

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Understanding Plate Tectonics: Earth's Dynamic Crust and Its Boundaries

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  1. Plate Tectonics January 2012

  2. Earth’s Plates • The crust is the solid layer (also called the lithosphere) • It is broken into piecescalled tectonic plates. • The tectonic plates are like the pieces of a jigsaw puzzle. • Plates intersect or meet at boundaries • Three different types of boundaries • Look at this picture, and draw each of the three types of boundaries.

  3. Seafloor spreading • Watch this animation. • The Mid-Ocean Ridge is an example of a divergent boundary. • It can be seen from space. • It is on the ocean floor • Think: if the ocean floor spreads apart here, what must happen somewhere else?

  4. Mountain making Convergent boundaries Example in Hawaii • Plates move toward each other • When they collide, one moves under the other • Mountains are created • Volcanoes occur

  5. Plate movement is powerful! Mountain building Effects of plate movement

  6. Transform boundaries No elevation, side to side only California’s San Andreas Fault

  7. One more example of San Andreas power!

  8. Now, it’s your turn! • Read your text (pages 324 – 328, & 334 – 337.) • Write your background paragraph telling how the Earth’s surface changes. • Gather materials • “Build” your mantle and crust • Simulate the boundaries and their movement • Can you make mountains, mid ocean ridges, and bend railroad tracks??

  9. Homework • Complete your reading of assigned text pages tonight (324 – 328, & 334 – 337). • Write 3-4 sentences about the ways the Earth’s surface can change as a result of plate movement at boundaries. • Come prepared to test your knowledge in our lab.

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