time+travel

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 * Time Travel **

Precambrian - the oldest division of geological time, named after Cambria, Wales, were fossils of this period were found. This is the longest era of four. Paleozoic - the era of geological time characterized by the appearance of primitive fishes, land plants, primitive reptiles. This is the second longest era of four. Mesozoic - relating to the third era of geological time. This is the third longest era of four. Cenozoic -  relating to the latest era of geological time. This is the shortest era of four. Four Eras of Geological time : Precambrian, Paleozoic, Mesozoic, and Cenozoic. Albert Victor - in 1911, young German scientist thinking how continents and oceans change over geological time. His idea is revolutionary because the Earth surface starts to be fixed, permanent and unchanging. His concept became basis for the modern theory of Plate Tectonics. Pangaea - meaning all lands 8. Oceans are as old as Earth. Mid-Ocean Ridges - discover enormous mountains chains in fracture crust. Late 1960's it was cleared that enough evidence had been gathered to confirm Wegener's theory of Continental Drift .


 * Questions: **


 * 1. ****who discovered the Four Era of Geological time? **


 * 2. ****Why Precambrian is the longest era of four? **


 * 3 ****. ****Why they named the super continent PANGAEA? **


 * I think the point of watching those videos were, of course to learn...and maybe to be widely awake (since we are exercising at that time) **

great 48/48