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Asthenosphere, Lithosphere, Convection Do Now: 6/11 1. What continental drift? 2. What is Pangaea? 1. On your Do Now, copy the diagram below and label the layers of the Earth. 2. Which layer of the Earth contains the continents we live on? Guided Notes: 6/11 Tectonic Plates A tectonic plate is made of the lithosphere. The lithosphere is crust (oceanic or continental) connected to a hard rock layer below Tectonic plates are moved by the asthenosphere The asthenosphere is a slushy part of the Upper Mantle --10 km --100 km --200 km Guided Notes: 6/11 Tectonic Plates Lithosphere -cooler Asthenosphere -very hot -hard, solid rock -slushy -contains the crust and hard -causes lithosphere to break part of the mantle into tectonic plates -is what tectonic plates are made of -moves tectonic plates Guided Notes: 6/11 Tectonic Plates Convection- the cycle of heat rising and cold material sinking (think of boiling water) Tectonic plates move because of convection of the asthenosphere acts like wheels rolling them around Drawing Assignment 1. Draw a diagram of a tectonic plate. Include both oceanic and continental crust, and arrows showing the convection of the asthenospher (Figure 8, pg. 400). Label: continental crust, oceanic crust, lithosphere, asthenosphere, convection arrows Make it look good! We’re putting this up in the classroom!