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Continental Drift

Continental Drift

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Continental Drift

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  1. Continental Drift By: Anthony Hill

  2. WWK • Explain the process of continental drift and how it has evolutionized our planet.

  3. WWK Information 1 • A  link   is   drawn   between   two   separate  phenomena,   continental drift, and the  expansion of the universe.  This   link is not an alternative explanation to continental drift   but  is an  attempt to  explain why  this phenomenon should   occur  and why  all continents  were oncepart of a single continent.    

  4. WWK Information 2 • The present theory of  continental drift was first proposed  by  Alfred Wegener  in 1912. • It is  thought that  all the  continents    were    once    joined together   in   one  super-continent, named  Pangaea. • The rest of  the earth was   covered  with  one  huge  ocean.  • Pangaea split apart  into the major continents we  have  today.  • The  upwelling material  was thought  to be  a  result of convection forces within the earth. • This material  reached the  surface at oceanic ridges  and returned to the   earth at sub ducting oceanic trenches.  

  5. K.S. • What is Continental Drift theory?

  6. Answer to K.S. • The continental drift theory says that all the continents used to be attached in one big continent. Seismic activity caused them to break apart and drift away from one another on the tectonic plates. A map of the world does look like a puzzle...

  7. Vocabulary • Continental Drift- The gradual movement of the continents across the earth’s surface through geological time. • Plate tectonics- A theory explaining the structure of the earth’s crust. • Divergent Boundaries- Occurs when two plates move apart. • Faults- A large fracture in rock along which movement occurs.