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exped_commotion - General Oceanography Geology 105...

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83 General Oceanography Name__________________ Geology 105 Expedition 7 - Commotion Beneath the Ocean Yes, I understand that skipping answers will receive negative points on course folder (two or more answers skipped will result in a deduction of -5 points; -10 point penalty will be assessed if more than more than 5 answers are skipped, and a penalty of -20 points will be assessed if the expedition is missing from the folder - yes - you can get negative points!) _____________________________ (your signature) SIGN!!! Many of the figures in this handout and the online expedition are derived from "This Dynamic Earth" by Jacqueline Kious and Robert Tilling of the U.S. Geological Survey. (http://pubs.usgs.gov/publications/text/dynamic.html ) Remember to use the handout to take notes just as if you were listening to a lecture! Plate tectonics was a revolution in the earth sciences, which was launched by oceanographers. In this class we will use tectonics to examine: the formation and recycling of the seafloor and oceanic lithosphere, formation of trenches, volcanic islands motions of the seafloor marine hazards, such as the locations of earthquakes and volcanoes 1. Introduction Is the Earth a dynamic planet? _______ (yes or no) Why or why not? __________________ ______________________________ From "This Dynamic Earth" by Jacqueline Kious and Robert Tilling of the U.S. Geological Survey.
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84 2. The Theory of Plate Tectonics What is continental drift? _______________________ _______________________________________ _______________________________________ _______________________________________ What is the name of the supercontinent? __________________ When did the continents last form a large, single continent? a. 18,000 years ago b. 180,000 years ago c. 1,800,000 years ago d. 18,000,000 years ago e. before 180,000,000 years ago The breakup of Pangea resulted in the formation of the modern ocean basins as continental masses drifted apart, allowing seawater to flow between the land masses.
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