A:B: Continents fitting together like a puzzle. Matching fossils found in opposite sides of oceans. C:D: Matching mountains structures found in opposite sides of oceans. All of these #4 Which of the following support/s the concept of Plate Tectonics? Watch short Plate Tectonics video
A:B: Mid-ocean ridgemantle C:D: Rift valleyplates #12 As a result of sea floor spreading, magma moves toward the __________, cools and forms new ocean floor and ridges. Watch short Sea-Floor Spreading video
A:B: crustal plates continue to move crustal plates are no longer moving C:D: weather patterns are repeating None of these #14 The observable hot spot activity in a mid- ocean ridge is evidence that ____________.
Explain what is happening at X trying to use the underlined words. This is a divergent plate boundary. Convection currents of magma in the lithosphere located in the mantle cause magma to move up through the Mid-Atlantic Ridge. New rock covers old rock when the magma cools. The result is sea floor spreading. (Watch the video in #12 for a good explanation.) X #16
Explain what is happening at Z trying to use the underlined words. This is a convergent plate boundary. The more dense ocean floor crust pushes under the continental crust. This movement is called subduction. Volcanoes can result from this process. Z #17
A:B: Convergent Divergent C:D: Transform None of these #18 Subduction zones and volcanic islands are landform created by what boundary?