Guided Notes about Continental Drift Chapter 17, Section 1.

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Guided Notes about Continental DriftChapter 17, Section 11. Who were the first to consider the idea of moving landmasses?Early mapmakers were the first to consider moving landmasses. They noticed how continents fit together.2. Construct a flow map or timeline1. Abraham Orteliuslate 1500s: - thought that North America and South America were separated from Europe and Africa by floods and earthquakes.2. Construct a flow map or timeline2. Eduard Suesslate 1800s: thought that the Southern continents were once joined together as a single landmass, which he called Gondwanaland2. Construct a flow map or timeline3. Alfred Wegener1912: -proposed the theory of continental drift,but it was rejected by the scientific community3. Describe Wegeners theory of continental drift and Pangaea.Earths continents were once joined as a single landmass. Wegener called it Pangaea, which means all the Earth. It broke apart 200 million years ago, and since that time, the continents have been drifting to their current positions.Evidence for Continental DriftFIT OF THE COASTLINES the coasts of South America and Africa fit together like a puzzle in the Atlantic OceanEvidence for Continental DriftSIMILAR ROCK FORMATIONSRocks in areas that were once joined have the same age and structure, such as the Appalachian Mountains and mountains in Greenland and Europe.Evidence for Continental DriftFOSSILSFossils of land animals and plants were found in widely separated continents. These fossils are all the same age, which suggests that all land was once joined.Glossopteris (an ancient fern-like plant)Mesosaurus (a small aquatic reptile)Evidence for Continental DriftCLIMATE EVIDENCELayers of coal were found in polar regionsGlacial deposits were found in tropical and temperate regions5. Why was Wegeners hypothesis rejected?1. Wegener could not explain what was causing the continents to move.2. Wegener could not explain how the continents were able to move through the solid rock of the ocean floor.

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