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NS 1300 Emergence of Modern Science

NS 1300 Emergence of Modern Science. Chapter #17 Plate Tectonics. Plate Tectonic Theory. Continental Drift Pangea Biogeography Magnetic Reversals. Earth’s Interior. Inner Core (solid) Outer Core (liquid) Mantle Moho Athenosphere (plastic) Lithosphere (crust) Hydrosphere Atmosphere.

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NS 1300 Emergence of Modern Science

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  1. NS 1300 Emergence of Modern Science Chapter #17 Plate Tectonics

  2. Plate Tectonic Theory • Continental Drift • Pangea • Biogeography • Magnetic Reversals

  3. Earth’s Interior • Inner Core (solid) • Outer Core (liquid) • Mantle • Moho • Athenosphere (plastic) • Lithosphere (crust) • Hydrosphere • Atmosphere

  4. Crust – Mantle Boundary

  5. Crustal Plates

  6. Types of Plate Boundaries • Divergent Plate Boundaries • Convergent Plate Boundaries • Transform Plate Boundaries

  7. Divergent Plate Boundaries • Sea-Floor Spreading • Age of Ocean Floor • Magnetic Anomalies

  8. Convergent Plate Boundaries • Subduction • Volcanic Arcs • Orogeny

  9. Transform Boundaries • San Andreas Fault

  10. Hot Spots • Oceanic Hot Spots • Island Chains • Continental Hot Spots

  11. Describing Plate Motion • Rotation Pole • Angular Momentum • Pangea

  12. Geologic Maps

  13. Quiz • 1. T or F, the earth’s mantle is made of solid rock. • 2. T or F, the mid-ocean ridge is a convergent boundary. • 3. T or F, the Marianis trench is a divergent boundary. • 4. T or F, the San Andreas fault is a transform boundary. • 5. T or F, the Hawaiian Islands are the result of hot spot volcanism.

  14. Test Questions • The earth is made of many layers: the solid inner core, liquid outer core, plastic mantle, and solid crust. • The earth’s crust is a thin solid layer of rock floating on the plastic mantle below it. The crust is broken up into many plates. Plates can have ocean crust, continental crust, or combinations of both. • Hot spots in the mantle form island chains as ocean crust moves above them. • The theory of plate tectonics is the unifying theory of geology. Evidence of plate tectonics includes magnetic reversals, the shape of the continents, and patterns of biogeography, volcanic activity, and hot spot island chains. • Ocean crust is denser than continental crust, so it sinks deeper in the mantle. • Where plates move apart as new crust forms is called a spreading center or rift zone. This can occur in the oceans or on land. • When plates with ocean crust run into plates with continental crust they are subducted. • When two plates with continental crust collide, mountains form through orogeny. • When plates with a combination of ocean and continental crust collide they slide against each other along transform faults.

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