Plate Tectonics

Theory of Plate Tectonics Watch the video before completing the worksheet. What is the lithosphere? The crust The upper mantle The lower mantle A and B All of the above Fill in the blanks using the word options:mantle, crust, tectonic, lithosphere Tectonic plates are a block of lithosphere that consists of the crustand the rigid, outermost part of the mantle. Matching Terms Match the following terms and definitions by dragging a line between them. Continental Drift The theory that all continents were once one land mass that separated and drifted apart over time. Pangea the landmass that existed when all continents were joined Sea-floor spreading The process of new oceanic crust forming as magma rises toward the surface and solidifies Mid-ocean ridge A place where sea-floor spreading has occured Subduction when two tectonic plates collide, and one plate moves under the other and sinks into the mantle Subduction zones regions where subduction occurs theory of plate tectonics explains how large pieces of Earth’s outermost layer, called tectonic plates, move and change shape boundaries where tectonic plates meet convergent boundary boundary formed by the collision of two plates divergent boundary boundary between two tectonic plates that are moving away from each other transform boundary the boundary between two tectonic plates that are scraping past each other horizontally ring of fire a ring of volcanoes around the Pacific Plate Sort the tectonic plate movement by its effect: Does it destroy crust, or does it create new crust? Destroys Crust subduction convergent boundary mountain ranges Creates Crust Sea-floor spreading mid-oceanic ridge divergent boundary Land formations Match which land formation is caused by which kind of tectonic plate movement. continental-continental convergent mountain ranges continental-oceanic convergent volcanoes oceanic-oceanic convergent islands oceanic-oceanic divergent mid-ocean ridges continental-continental divergent valleys transform fault lines Subduction Trenches, volcanoes Fill in the blanks about transform boundaries and earthquakes. Plates separated by a transform fault do not glide past each other. Friction in the rocks causes the plates to lock. The friction, or pressure, builds until they SNAP! The sudden release of energy is what we feel during an earthquake.