2. Continental drift Tectonic Plates Pangaea Divergent Margin Plate Tectonics Explained Number of Earthquakes Worldwide for 2005 - 2012

3. * Continental drift is the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed. The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596.

4. * Plate tectonics (also known as Tectonic Plates) is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.

5. * Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It formed around 300 million years ago and then began to break apart after about 100 million years.

6. * A divergent boundary or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other. * Divergent boundaries within continents initially produce rifts which eventually become rift valleys. * Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges. Divergent boundaries also form volcanic islands which occur when the plates move apart to produce gaps which molten lava rises to fill.

8. Magnitude20052006200720082009201020112012 8.0 to 9.912401112 7.0 to 7.9109141216231912 6.0 to 6.9140142178168144150185108 5.0 to 5.916931712207417681896220922761401 4.0 to 4.913917128381207812291680510164133159534 3.0 to 3.9919199909889117352905434127912453 2.0 to 2.946364027359738603014462636433111 1.0 to 1.92618422126394743 0.1 to 0.902201010 No Magnitude864828180719221724113 Total304782956829685317771482521577*22289*16667 Estimated Deaths 88003660571288011179032012021953768