Van Andel, T. H. (n.d.). What was the evidence for Wegener’s theory? Michael Leddra. Terms in this set (33) The Continental Drift Theory. C. Is the idea that the continents are slowly drifting further away from each other. National Geographic. You may imagine that these plates are zipping along, but in fact, they are moving VERY SLOWLY! There are currently seven plates that make up most of the continents and the Pacific Ocean. From Continental Drift to Plate Tectonics, Geology 12 (Learning Outcomes Framework 2015), Learning Outcomes Framework: Science Grade 7 (2014), Experiential Science 10 - Terrestrial Systems, Experiential Science 30 - Freshwater Systems, Earth and Space Science, Grade 12, University (SES4U), The Earth and Space: Geological and Geological phenomena, Earth and Space Science – Earth’s Crust and Resources (EC), Earth Sciences 11 (British Columbia, June 2018, Science Grade 8 (British Columbia, June 2016). Write. The crust and upper part of the mantle are broken into tectonic plates. (n.d.). Plate tectonics is the theory that Earth's land masses are in constant motion. This online book has a number of different sections about plate tectonics. Forefront Teaching Resources Ltd, Washington, Tyne and Wear, UK. Frisch and Meschede and Blakey answer all these questions and more through the presentation and explanation of the geodynamic processes upon which the theory of continental drift is based and which have led to the concept of plate tectonics. What is continental drift? Wegener came up with this idea because he noticed that the coasts of western Africa and eastern South America looked like puzzle pieces, which might have once fit together and then drifted apart. Oceanic plates are denser than continental plates. Scientists believe that there were several supercontinents like Pangaea that formed and broke apart over the course of Earth's 4.5-billion year lifespan. Also, fossils of the land reptile Lystrosaurus have been found in rocks of the same age in Africa, India and Antarctica. Since the plates are floating on liquid rock, they are constantly moving and bumping against each other. They are both large, steep landforms made of rock that are formed when tectonic plates are pushed and pulled. Well, for one thing, Wegener did not have a convincing explanation for the cause of the drifting (he suggested that the continents were moving around due to the Earth’s rotation, which later turned out to be wrong). Learn. This process formed wrinkles, or mountains, on the Earth’s crust. This process formed wrinkles, or mountains, on the Earth’s crust. Home Economics: Food and Nutrition (CCEA). Continental drift is the idea that continents passively move due to the movement of plate tectonics. If this was the case, then mountains would be spread evenly over the Earth’s surface. Video showing how convection cells inside the Earth move tectonic plates on the Earth’s surface. Describe the three types of tectonic plate and how the processes lead to changes in Earth’s surface features. Continental Drift, Plate Tectonics, and the Bible BY STUART E. NEVINS, M.S. In it, Wegener said that the continents were not fixed in place. Pangaea is not the only supercontinent believed to have existed. One piece of evidence Wegener provided was paleoclimatic indicators that linked South America and Africa (Plate Tectonics: Continental Drift). Before Wegener developed his theory, it was thought that mountains formed because the Earth was cooling down, and, as it cooled down, it contracted. Continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Tectonic plates not only move land masses (continental crust), but also oceans (ocean crust). They are: There are eight other smaller secondary plates as well as many other microplates which do not make up significant amounts of landmass. Today, the theory of continental drift has been replaced by the science of plate tectonics. Plate tectonics. Himalayan mountains (David Mark, Pixabay). Plate Tectonics and Continental Drift Jarðsaga 1 ... believe that so much continental drift could have occurred in so short time. Why? In the Theory of Plate Tectonics, it is tectonic plates, rather than continents, which are moving. “Wegener’s ‘Continental drift’ meets Wilson’s ‘Plate tectonics’: How Wegener’s continental drift evidence matches up with evidence for plate tectonics” Click to access 91_Wegener.pdf. Created by. Our tips from experts and exam survivors will help you through. 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