PPT-Continental Drift

Definition The very slow movement of the continental plates on the surface of the Earth due to tectonic activity through geological time What is the evidence of Continental Drift Continental Fit. Continental Drift. Objectives. Summarize Wegner’s hypothesis of continental drift. Describe the process of sea floor spreading. Identify how paleomagnetism provides support for the idea of sea floor spreading. Zhimin. He. iTechs. – ISCAS. 2013-03-21. Agenda. What’s Concept Drift. Causes of a Concept Drift. Types of Concept Drift. Detecting and Handling Concept Drift. Implications for Software Engineering Research. Manu Awasthi⁺. , . Manjunath. . Shevgoor. ⁺, Kshitij Sudan⁺, Rajeev Balasubramonian⁺, . Bipin. . Rajendran. ‡. , . Viji. . Srinivasan. ‡. ⁺. University of Utah, . ‡. IBM Research. Quick Summary. . Continents . (pages. . 136–140). Continental. . Drift. . (pages. . 137–139). Key. Concept:. . Alfred. . Wegener’s. . hypothesis. was that. . all the continents were once joined together in a. Trike. Max . Gundrum. Popular ideas. Video of Drift . Trikes. Trike. Video. Drift . Trikes. - Student Documentary Film . Motorized Drift . Trike. Battles . Basic Dimensions. Video on . Trike. design. Genetic Drift. Genetic drift is random fluctuation in allele frequency between generations. . The effects of genetic drift are pronounced in small populations. .. A Genetic Bottleneck is a Form of Genetic Drift. . 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.. Warm Up. 1. What is the thickest layer of the Earth? . 2. What is the thinnest layer of the Earth?. 3. What happens to temperature as the depth within the Earth increases? . 4. What happens to the density as the depth within the Earth increases? . Manu Awasthi⁺. , . Manjunath. . Shevgoor. ⁺, Kshitij Sudan⁺, Rajeev Balasubramonian⁺, . Bipin. . Rajendran. ‡. , . Viji. . Srinivasan. ‡. ⁺. University of Utah, . ‡. IBM Research. Quick Summary. The change in allele frequencies in populations due to . chance. (not selection). . Can include the loss of alleles from the gene pool.. Genetic drift. The change in allele frequencies in populations due to . Mass Extinctions, & . Adaptive Radiations. The rise and fall of dominant groups. Continental Drift. The continents are part of great plates of the Earth’s crust that essentially float on the underlying portion of the mantle. The World. ALFRED WEGENER. THEORY OF CONTINENTAL DRIFT. Found evidence for PANGAEA and proposed the theory of continental drift.. Continental Drift Theory. Theory that continents were once part of a single landmass 200 million years ago that broke apart and have moved to their present locations. . 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.