Continental Drift. What is continental drift? 1912 Alfred Wegener Hypothesized that- the continents are moving = Continental drift all continents once

Download Continental Drift. What is continental drift? 1912 Alfred Wegener Hypothesized that- the continents are moving = Continental drift all continents once

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<ul><li><p>Continental Drift</p></li><li><p>What is continental drift?</p></li><li><p>What is continental drift?1912 Alfred WegenerHypothesized that-the continents are moving= Continental driftall continents once formed a supercontinent = Pangaea </p></li><li><p>Many pieces of evidence suggest that Pangaea existed</p></li><li><p>How do South America and Africa fit together?(Evidence #1) S. Americas east coast fits like a puzzle piece withAfricas west coast</p></li><li><p>How do South America and Africa fit together? </p><p>Evidence #1South Americas east coast fits like a puzzle piece with Africas west coast.</p></li><li><p>Look at the two images.What do you noticeabout the mountainsin North America and Europe?</p></li><li><p>Look at the bottom picture.What do you noticeabout the mountainsin North America and Europe?The Appalachian Mtns. (USA) and the mountains in Europe once formed a single mountain range.(Evidence #2) The type of rocks in different continents are similar</p></li><li><p>What can past climates tell us?Evidence #3Continents show past changes in the climate</p><p>Fossils of tropical plants in Antarctica, indicate a warmer, tropical climate at one time</p><p>Rocks show that glaciers once formed on Pangaea</p></li><li><p>Evidence #4 Africa, South America, and Australia all have similar fossils of the fern, Glossopteris.(lighter colored area below) </p></li><li><p>How is the fossil evidence useful for proving Continental Drift? (discuss &amp; write)</p></li><li><p>How do we know that continents are pushed apart?</p></li><li><p>How do we know that continents are pushed apart?Evidence #5 Seafloor spreading at mid-ocean ridges (1962 H. Hess)Rocks made in the Atlantic Ocean are younger (or newer) than the continents</p><p> Heres how we know this-</p><p>Crust furthest from the ridge has older sea-fossils </p><p>Patterns in iron crystals (paleomagnetism) indicate that ocean crust began forming less than 160 million years ago</p></li><li><p>How many tectonic plates are there? Scientists have identified7 major plates and 14 smaller ones</p></li><li><p>How many tectonic plates are there? Scientists have identified7 major plates and many smaller onesSmithsonian</p></li><li><p>Where are volcanoes found?Write down one thing that you notice about where volcanoes occur</p></li><li><p>Where are volcanoes found?Write down one thing that you notice about where volcanoes occur</p><p>Evidence #6: Volcanoes and earthquakes near plates</p></li><li><p>When did Pangaea break apart? During the Mesozoic Era, about 200 m.y.a. </p></li><li><p>Summary of evidence:#1 Continental coastlines fit together (Wegener)</p><p>#2 The type of rocks in different continents are similar (Wegener) </p><p>#3 Past changes in the climate can be explained by Continental Drift (Wegener)</p><p>#4 The same plant &amp; animal fossils are found on different continents (Wegener)</p><p>#5 Seafloor spreading explains plate movement</p><p>#6 Volcanoes &amp; earthquakes indicate plate movement</p></li><li><p>Handout- Continental Drift Sequence</p><p>A. Color each continent the same color in each picture of the sequence.</p><p>B. Identify each continent and label them.</p><p>C. On the back, describe what happens with the continents as time passes.</p><p>D. Draw a prediction of where they will be in the future.Continents North America EurasiaSouth America AntarcticaAfrica IndiaAustralia</p></li><li><p>resourceshttp://www.plainedgeschools.org/swells/plate_tectonics.htmhttp://slohs.slcusd.org/pages/teachers/rhamley/Biology/Continental%20Drift/Tectonics.htmlhttp://geology.rutgers.edu/103web/Pangeabreakup/breakupframe.html</p></li><li><p>What is continental drift?1912 Alfred WegenerEvidence shows that-the continents are moving= Continental driftall continents once formed a supercontinent = Pangaea</p><p>********************</p></li></ul>

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