2 What is a Theory? In science, it’s almost the same as a fact Must be some sort of evidence to support a theoryEven with evidence there is still debate about how true it is
3 Continental Drift Theory Alfred Wegener said the world used to be one large land mass millions of years agoThe land was called PangaeaPangaea kept moving apart a few centimeters each yearAfter millions of years it became the world we see today
5 Continental Drift Theory Evidence for Continental DriftincludesincludesincludesincludesContinental EdgesRock StructuresSame FossilsClimatefit likeshowedseen in evidence fromfoundMountains with similar featuresPuzzle PiecesContinental ice sheetsOn different continents
6 Plate TectonicsPlate Tectonics – a more advanced theory about how the continents moveExplains that there are loose plates in the earth that shift causing:Oceanic TrenchesMountainsVolcanoesEarthquakes.