Earth Materials â Geology Plate tectonics Why have all the mountains not worn away by now? 100âs of free pptâs from www.pptpoint.com library Earth Structure Radius 6300-6400km…

Earth Science Continents Drifting Alfred Wegener in 1912 Wegener thought whole sections of the crust moved (plate tectonics) Some people did not understand and thought the…

4 Layers of the earth 7 main plates of the earth 3 main plate boundaries 2 types of crust 3 main features of plate tectonics (F.E.E.D) 3 main theorists and theories Human…

Volcanoes Volcanoes and Plate Tectonics A _____________ is a weak spot in the crust where molten material, or _______, comes to the surface. ________ is a molten mixture…

Plate tectonics PRESENTED BY-G.S.YADAV J.N.V.-KORBA G S YADAV Earth Structure Radius 6300-6400km Thin crust Mantle extends almost halfway to the centre The core makes up…