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Continental Drift & Plate Tectonics. Continental Drift Theory First proposed by Alfred Wegener in 1912: –250 million years ago, all of the continents.

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Presentation on theme: "Continental Drift & Plate Tectonics. Continental Drift Theory First proposed by Alfred Wegener in 1912: –250 million years ago, all of the continents."— Presentation transcript:

1 Continental Drift & Plate Tectonics

2 Continental Drift Theory First proposed by Alfred Wegener in 1912: –250 million years ago, all of the continents were combined into one super-continent called “Pangaea” –The continents gradually drifted apart to where they are today Wegner didn’t make up this theory out of the blue – like all scientists, he based it on evidence

3 Evidence Summary Geographic fit of South America and Africa Fossils match across oceans Rock types and structures match across oceans Ancient glacial features

4 Geographic Fit Continents look like they could be part of a giant jigsaw puzzle Here’s how they moved apartHere’s how they moved apart

5 Fossils Match Plant and animal fossils found on the coastlines of different continents

6 Fossil Fuel in Antarctica Tropical plant remains (coal deposits) found in Antarctica –t–this is evidence that Antarctica was once much warmer and much closer to the equator, since tropical plants don’t grow in Antarctica today

7 Rock Structures Match Across Oceans Same rock patterns found in South America, India, Africa, Antarctica and Australia

8 Rock Structures Match Across Oceans

9 Ancient Glacial Features Glaciation in Africa, South America, India, and Australia during the same time

10 Ancient Glacial Features

11 More Great Science from The Science Vault If you enjoyed this powerpoint, you might like these other best-selling products: Chemical Bonding Go FishChemical Bonding Go Fish: making chemical bonding less abstract and more fun; several different games allow for differentiation for all ability levels, grades 8 – 12 Scientific Method/Experimental Design UnitScientific Method/Experimental Design Unit: a full-fledged unit with powerpoints, worksheets, and quizzes – great to start off the year, or review throughout the year Continental Drift and Plate Tectonics Powerpoint Continental Drift and Plate Tectonics Powerpoint – 50 interactive slides that introduce continental drift and plate tectonics. Includes links to websites for flash animations The Life Cycle of Stars Powerpoint The Life Cycle of Stars Powerpoint – gorgeous photos and videos bring this powerpoint alive for your students © Jan Parker, The Science Vault, 2009 – for purchaser’s classroom use only. Please do not distribute. For more great science and class management materials plus current events in science you can use in your classroom follow me at on or on Facebook at https://www.facebook.com/TheScienceVault or head on over to my TpT store: © Jan Parker, The Science Vault, 2009 – for purchaser’s classroom use only. Please do not distribute. For more great science and class management materials plus current events in science you can use in your classroom follow me at on or on Facebook at https://www.facebook.com/TheScienceVault or head on over to my TpT store:


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