Plate tectonics theory

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Explaining plate movement • continental drift “<strong>theory</strong>” (really a hypothesis) • presented evidence that plates had moved, but could not explain how. •Theory lacked a “mechanism” for plate movement. • modern plate tectonic <strong>theory</strong> • provided mechanism (how) and driving force (why)
Continental Drift Theory / Hypothesis
Page 1: Plate tectonics theory • Earth’
Page 6 and 7: Other evidence discussed in text Co
Page 8: A simple lab model of the earth’s
Page 11 and 12: 1.25” Styrofoam ρ
Page 13 and 14: Crust is thin upper “skin” of l
Page 15 and 16: Continental crust is lighter (less
Page 17 and 18: Continental margins: transitions be
Page 19 and 20: Passive continental margins: Oceani
Page 21 and 22: Active continental margins: If move
Page 23 and 24: Active continental margins: Oceanic
Page 26 and 27: Now know of three types of motion a
Page 28 and 29: An oceanic-oceanic convergent plate
Page 31 and 32: Divergent boundaries are located ma
Page 33 and 34: A continental-oceanic transform pla
Page 36: Testing Plate tectonics model • P

Plate tectonics theory

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