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5-Plate tectonics - Where are earthquakes(yellow dots...

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Where are earthquakes (yellow dots) located relative to main features of Earth s surface? Mid-ocean ridges Trenches Mountain belts LG2
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Where are active volcanoes (orange triangles) located relative to main features of Earth s surface? Mid-ocean ridges (not all shown) Mountain belts next to trenches Red Sea and East Africa LG2
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Earth s surface can be divided into plates on the basis of tectonic activity Earthquakes, volcanism, and/ or mountain building = tectonic activity Belts of tectonic activity divide lithosphere into tectonic plates LG3
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How are those plates structured below the Earth s surface (i.e., in a cross section)? ?????????????????????????????????????? ??????????????????? LG4
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Each tectonic plate behaves as single unit and interacts with other plates in three possible ways. Move apart: divergent boundary Move toward each other: con vergent boundary Move horizontally past one another: transform boundary
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Three layers are depicted here (maybe four?) what are they? Move apart: divergent boundary Move toward each other: con vergent boundary Move horizontally past one another: transform boundary
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Continental crust Oceanic crust Mantle Earth can be divided into layers of different composition : Core Mantle Crust
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Continental crust Oceanic crust Mantle Why are there two kinds of crust? How do they differ? Can continental crust have ocean on top? Continental shelf
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Compositional layers of Earth differ in their amounts of Silicon (Si) and Iron (Fe). Core : nearly all Fe Density = 12-15 gm/L Mantle : Silicate rocks high in Fe Density = 3.4 to 5.6 gm/L Continental crust: Si- rich, Fe-poor rocks Density = 2.8 gm/L Oceanic crust: Rocks intermediate in Fe composition Density = 3.2 gm/L
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ASTHENOSPHERIC MANTLE: Mostly solid (>98%), very hot, weak = flows under pressure LITHOSPHERIC MANTLE: Strong = breaks under pressure, attached to overlying crust. ASTHENOSPHERIC MANTLE LITHOSPHERIC MANTLE CONTINENTAL CRUST OCEANIC CRUST LITHOSPHERE = strong, rigid part of Earth = tectonic plates Layers of the upper Earth can also be divided based on how they behave under pressure: whether they tend to break or flow.
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A B C D crust Lithospheric Mantle Asthenospheric mantle rest of the upper mantle Lithosphere - rigid Asthenosphere – solid, but so hot that it will flow. Thus far weaker than the lithosphere Earth Layers (Cross section of the Earth s crust and upper mantle) LG4
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How are those plates structured below the Earth s surface (i.e., in a cross section)? Cross section has to depict how plates on surface relate to the crust, lithospheric mantle and asthenosphere LG4
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How are those plates structured below the Earth s surface (i.e., in a cross section)? Fill in cross section to depict how plates on surface relate to the crust, lithospheric mantle and asthenosphere (just focus on layers, ignore ridge and trench for now) LG4
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How plates are structured below the Earth s surface (i.e., in a cross section).
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