*Scientific Keywords Based Upon The Movement of Earth’s Tectonic Plates.

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Continental drift

Tectonic Plates Pangaea Divergent

Margin

Plate Tectonics Explained

Number of Earthquake

s Worldwide for 2005 -

2012

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*Continental Drift.

*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.

Home*Tectonic

Plates.

*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.

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*Pangaea.

*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.

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*Divergent Margin

*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.

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*Plate Tectonics Explained

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*Number of Earthquakes

Worldwide for 2005 - 2012

Magnitude 2005 2006 2007 2008 2009 2010 2011 2012

8.0 to 9.9 1 2 4 0 1 1 1 2

7.0 to 7.9 10 9 14 12 16 23 19 12

6.0 to 6.9 140 142 178 168 144 150 185 108

5.0 to 5.9 1693 1712 2074 1768 1896 2209 2276 1401

4.0 to 4.9 13917 12838 12078 12291 6805 10164 13315 9534

3.0 to 3.9 9191 9990 9889 11735 2905 4341 2791 2453

2.0 to 2.9 4636 4027 3597 3860 3014 4626 3643 3111

1.0 to 1.9 26 18 42 21 26 39 47 43

0.1 to 0.9 0 2 2 0 1 0 1 0

No Magnitude864 828 1807 1922 17 24 11 3

Total 30478 29568 29685 31777 14825 21577 *22289 *16667

EstimatedDeaths

88003 6605 712 88011 1790 320120 21953 768

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* Total Number of Earthquakes Worldwide vs. Estimated Deaths

for 2005 - 2012

2005

2006

2007

2008

2009

2010

2011

2012

0

50000

100000

150000

200000

250000

300000

350000

TotalEstimated deaths