Ppt Continental Drift Plate Tectonics Powerpoint Presentation Id The history of continental drift 1. plate tectonics defined. 2. what did plate tectonics replace? 3. alfred wegener and continental drift. evidence theory outcome plate: the earth’s crust consists of a number of mobile plates, masses of crust that move independently of adjacent plates. Presentation transcript. continental drift & plate tectonics • continental drift is the idea that the continents move around on earth’s surface. • the surface of earth is broken into many pieces like a giant jigsaw puzzle. plate tectonics describes how these pieces move on earth’s surface. alfred wegener • alfred wegener was a german.
Ppt Continental Drift And Plate Tectonics Powerpoint Presenta Alfred wegener first proposed the theory of continental drift in the early 20th century. he noticed that the continents appeared to fit together and were once attached in a supercontinent called pangaea. wegener provided evidence from matching coastlines, fossil and rock formations, and paleoclimatic data to support his theory. Earth's lithosphere moves over time pangaea (break up) theory of plate tectonics oceanic is dense basalt. continental is lighter granite. size and thickness vary – a free powerpoint ppt presentation (displayed as an html5 slide show) on powershow id: 138408 mguwy. Follow. continental drift theory proposed that the continents were once joined together in a supercontinent called pangaea. wegener provided evidence like matching fossil and rock formations across continents, but his theory was rejected due to lacking an explanation for how the continents moved. later studies of the seafloor using sonar. Plate tectonics and continental drift. plate tectonics and continental drift. plate tectonics. the surface of the earth is composed of about a dozen major rigid, moving crustal plates and several smaller plates plates a. slabs of earth’s lithosphere (crust and upper mantle) b. average thickness is 100 km (62 miles) 195 views • 8 slides.
Ppt Continental Drift And Plate Tectonics Powerpoint Presenta Follow. continental drift theory proposed that the continents were once joined together in a supercontinent called pangaea. wegener provided evidence like matching fossil and rock formations across continents, but his theory was rejected due to lacking an explanation for how the continents moved. later studies of the seafloor using sonar. Plate tectonics and continental drift. plate tectonics and continental drift. plate tectonics. the surface of the earth is composed of about a dozen major rigid, moving crustal plates and several smaller plates plates a. slabs of earth’s lithosphere (crust and upper mantle) b. average thickness is 100 km (62 miles) 195 views • 8 slides. Plate tectonics. the document discusses plate tectonics and describes how the earth's lithosphere is broken into plates that move over time. it explains that plate tectonics built upon alfred wegener's theory of continental drift, which proposed that the continents were once joined together in a supercontinent called pangaea. there are nine. This document discusses plate tectonics and provides key information about the theory. it explains that 1) plate tectonics is known to occur through evidence like earthquakes and volcanoes occurring at plate boundaries, and magnetic stripes in ocean crust indicating sea floor spreading. it also notes that 2) most earthquakes and volcanoes happen along plate boundaries, and that 3) new ocean.
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