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Plate Tectonics Understanding what causes the plates to move EQ: How do you know the Earth’s Core is hot? Fact: No one has ever drilled through crust Evidence: Magma Volcanoes Earthquakes Tsunamiis Layers of the Earth Upper Mantle Lower Mantle Outer Core Inner Core asthenosphere 3 Forms of Heat Transfer Radiation- transfer of energy without touching; light --- heat energy Conduction- transfer of heat energy through solids (metal pan for cooking) very even Convection- transfer of heat energy in a liquid very unequal (hot spots and cold areas develop that’s why you stir soups) Nacho-tonics Using Nachos you can simulate why the Earth’s plates move The materials will represent the parts of the Earth Nacho-tonics Pan = core (inner core specifically since it’s a solid) Cheese = Mantle (liquid like but high density material) Chips= Earth’s Crust (solid less dense than liquid underneath) Origin of Atmosphere and Oceans Magma released gases and liquid Water Vapor as it came to the Surface This can be “proven by” placing lid over pan. Lid acts as Earths Magnetic Field Shielding Earth from Solar Wind As a result a “thick” atmosphere develops and clouds and rain form