Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Cornell Notes Topic/Objective: The Theory of Plate Tectonics Name: Class/Period: Date: Essential Question: What is the theory of plate tectonics? What are the three types of plate boundaries? Questions: Notes: plate tectonics - • • _______________suggests that Earth’s surface is divided into large ___________ of rigid rock and each plate ____________ over Earth’s hot and semi plastic mantle. In the 1940s scientists determined the depth of the ocean using an echo sounder. mid-ocean ridges- Seafloor spreading – In your own words describe what plate tectonics is? Divergent plate boundary - • • When the ___________ spreads at a mid-ocean ridge, lava erupts, cools, and forms new ___________. _____________ plate boundaries can also exist in the middle of a continent, where they ___________ continents apart and form rift valleys. Divergent Boundary Diagram Transform plate boundary - • As they move past one another, the plates can get stuck and stop moving. • Transform Plate Boundary Diagram Convergent plate boundariesSubduction- • When an __________ plate and a ____________ plate collide, the denser oceanic plate subducts under the edge of the continent, creating a deep ______________ and a line of _______________ above the subducting plate on the edge of the continent. • When two ______________ plates collide, neither plate is subducted, and _______________ form from uplifted rock. Convergent continental oceanic plate boundary Diagram What are three types of plate boundaries? Evidence for Plate Tectonics • _____________ form where plates separate along a mid-ocean ridge or continental rift or collide along a subduction zone. • . • • Earth’s plates move because the asthenosphere moves underneath the lithosphere. Convection – • Convection currents in the asthenosphere act like a conveyor belt _______________ the lithosphere above it. Summary: Questions: Notes: Summary: