PPT-So what has caused the continents to drift ??

What do you think Recall Theory of Plate Tectonics Plate Tectonics refers to the movements of plates large segments of continents and ocean around the Earths surface These land masses are seen as a giant . Pangaea. Nearly 100 years ago, Alfred Wegener began an investigation that continues even today. . He wanted to know if Earth’s continents were in fixed (non-moving) positions.. He proposed that all the continents were once part of a supercontinent called Pangaea.. In 1812, Alfred Wegener presented his scientific theory called “Continental Drift”. It was based on his belief that the continents had drifted apart from one another.. Pangaea. Wegener ‘s hypothesis was that all the continents had once been joined together in a single landmass and have since drifted apart.. Zach Daniel White. Biology 101h- . Desaix. Why does it matter?. “An antidepressant that brought relief to only seventy percent [of patients] would be a valuable treatment if it did so in one week and had few side effects. Unfortunately, given the current clinical trial methods and placebo-response rates, such an antidepressant, regardless of its true efficiency, would not have more than a fifty percent chance of looking better than placebo. How 2 continents fell in love…and created a big, beautiful world. . By: Carla Vigil. SS-EP-4.1.2. Students will use geographic tools to identify major landforms (e.g., continents, mountain ranges), bodies of water (e.g., oceans, major rivers) and natural resources on Earth’s surface and use relative location. Video on Earth 1 million years from now. Theory of Continental Drift. Alfred Wegener . wrote . about his hypothesis of . continental . drift . in the 1900s. .. Continental drift.  is the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations. . . Chapter. 12-1. Pan-. gaea. . “. all. - earth. ” . Note: Our world today is actually a 2’nd or 3’rd generation “super continent” or “. pangea. ” !!!. . Alfred Wegener . Ahead of its Time. It has been recognized for along time that coastlines of South America and Africa appear to fit together. Still it is another feature of Geology where direct information had been missing, and the thinking of individuals were much different.. Do Now. Why is it important to learn about the continents . and oceans?. Directions. Answer the questions on the back. Question 1 can be found on page H3 and question 3 can be found on page H10. . Questions 2 and 4 can be found on Atlas page 129.. Evidence for Plate Tectonics. Changes in Sea Floor Magnetism. Evidence for Plate Tectonics. Continents fit together like a puzzle. Changes in Sea Floor Magnetism. Evidence for Plate Tectonics. Fossils of plants and animals of the same species found on different continents. . Ahead of its Time. It has been recognized for along time that coastlines of South America and Africa appear to fit together. Still it is another feature of Geology where direct information had been missing, and the thinking of individuals were much different.. Unit 12.1. These observations lead him to come up with the . ___________________________. A very long time ago (~200 million years) the continents were joined together in a . ___________________. called . “All the earth”. Pangaea split apart and the different land masses, or continents, drifted to their current locations on the globe. http://www.learner.org/interactives/dynamicearth/drift3.html. Alfred Wegener (1880-1930). “What are tectonic plates?. Classifying the Layers. There are two ways to classify the layers of the Earth:. Compositional. (Chemical): classifies based on chemical properties (. ie. : elements). Physical. http://www.sciencechannel.com/tv-shows/greatest-discoveries/videos/100-greatest-discoveries-continental-drift.htm. Restless Continents-pg. 248. Wegener proposed idea of . continental drift.. . -. C.