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Modern earth science section 4.1 continental drift
Evidence of continental drift theory
Evidence of continental drift theory
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Recommended: Modern earth science section 4.1 continental drift
Alfred Wegener was a meteorologist and astronomer. He was the first scientist to introduce the theory of the continental drift. Wegener theorized that at one time the continents were one large landmass or Pangaea that had drifted apart. His ideas were initially rejected by other scientists. It was not until long after Wegener’s death that proof was obtained and his theory verified.
The Life of Alfred Wegener
Alfred was born in Germany in 1880 and led a very busy life. He received a PhD in astronomy but quickly moved on to meteorology. He and his brother experimented with kites and balloons. They set a record flying a balloon during his first expedition to Greenland in 1906 (PBS, 1998, para. 2). Alfred taught meteorology and published his first book in 1911 titled “Thermodynamics of the Atmosphere”.
While looking at his friend’s atlas in 1910 Alfred noticed that the coastlines of the Brazil and West Africa looked as though they fit together (Conniff, 2012, para. 4). This thought did not leave his mind and he continued to research the idea. Wegener cut out the pictures of the maps and pieced them together like a puzzle. He located evidence of similar plants, animals, and other species on the Australian and South American continents to support his hypothesis.
In 1912 he first introduced the theory of the continental drift at a conference in Germany. He theorized that the continents had moved away from each other over a period of time and denied that land-bridges had existed to connect the continents. The same year he married the daughter of a meteorologist and returned on another expedition to Greenland. He went on to serve in the military during World War I. Although the idea about the continental drift had neve...
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...s are fit together it indicates they were once connected. Over a period of time the continents drifted apart. This is referred to as the continental drift.
It is unfortunate that the continental drift theory was not accepted during Wegener’s lifetime. Though his explanations for his hypothesis could not be substantiated at the time his theory was correct. It was some thirty years later before modern technology was used to begin testing and evidence was found to support Wegener’s theory.
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Hess, D., McKnight, T. L., & Tasa, D. (2011). McKnight's physical geography (Custom ed. for California State University, Northridge ; 2nd Calif. ed.). New York: Learning Solutions.
Pabook.libraries.psu.edu, (2014). The Pennsylvania Center for the Book - Rockview SCI. [online] Available at: http://pabook.libraries.psu.edu/palitmap/Rockview.html [Accessed 7 May. 2014].
The Old and New Worlds had been separated for millions of years before this voyage (except for periodic reconnections in the far north during the Ice Ages). This period of separation resulted in great species divergence and evolvement. There were still many similar species, such as deer and elm, but Europe had nothing like hummingbirds, rattlesnakes, and hickory and pecan trees. The differences were even greater in the southern hemispheres; the biggest mammal in Africa was the elephant, and the biggest mammal in South America was the cow-sized tapir. Both of these environmental systems struggled for a delicate sense of balance and homeostasis-- but their collision in 1492 began a whole new time of competition and struggle for dominance. The environmental impact of such a collision is enormous and should be looked at as part of our understanding of the Age of Discovery.
Charles Lyell was a British lawyer and one the smartest geologist known in his time. He was known as the author of the Principles of Geology, which helped popularize the theories and concepts of uniformitarianism. The Principles of Geology was the first book written by Lyell and explained the changes of the earth’s surface. He used the research and information in the book as his proof to determine that the earth was over 6,000 years old. The central argument in his book was “the present is the key to the past”, this meant that to find out what happened in the past you had to look at what was happening now. It explained that changes which happened in the past, were happening in the present, and will happen in the future. Lyell’s book was later published into three volumes from 1830-1833. After the publication, it gave him credentials as an important geological theorist. His book later influenced a young Charles Darwin. Lyell’s influential book led Darwin to follow his principles and they later became friends. Darwin began to explore the changes that happen on the earth and develop his theories of evolution, though Charles did not completely endorse Darwin’s theory of evolution. Lyell was a devout Christian and Darwin’s theory of evolution did not line up with his Lyell’s beliefs with natural selection. Darwin continued his research and beliefs of his own and became a scientist working with his theories of evolution.
edited by Thomas Riggs, 2nd ed., St. James Press, 1999, pp. 1047-1048. Gale Virtual Reference Library, Accessed 27 Sept. 2017.
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839-841). Hoboken, NJ: Wiley & Co., Inc. Kerzner, H. (2013). The 'Path of the Earth'. Journal of Science, 63(3), pp. 113-117.
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He was a mathematician and astronomer, among other things. Sobel mentions in her book that Newton gave written insight to the Board of Longitude about his thoughts on the problem of longitude. Another scientist of the Scientific Revolution that we studied was Galileo. Galileo was the astronomer that proposed a method of calculating longitude using the “eclipses of the moons of Jupiter” (Sobel 25). It is evident that some of the scientists we have studied in this course, played a role in solving the longitude problem.
The continental drift theory is a theory first proposed by a German geologist and meteorologist Alfred Wegener in 1915. This theory suggests that parts of the Earth’s crust which are called continents were slowly drifting above a liquid core. He didn’t randomly come up with this idea with whim, there are actually some solid evidence to support this theory. For example, the boundaries of South America’s eastern coastline and Africa’s western coastline are seemingly matched on a world map. Also, you can find similar animals and plants fossils around different continent shores, like the fossil of Mesosaurus was found both in South Africa and Brazil. (Rejoined continents [This Dynamic Earth, USGS].) Not only fossil proves this theory, but also same living animals are found on two different continents. Furthermore, Wegener found out that same rocks and mountain ranges begin on one continent, and end at one coastline; but on another continent cross the ocean, there are similar rocks and mountain ranges appear. For instance, people found rocks with same types and rocks in Greenland, Ireland, Scotland, and Norway which are places really far away from each other. Last but not least, base on climatic evidence, scientists later pointed out that there are glacial striations in South America, Africa, Madagascar, Arabia, India, Anta...
Convergent boundaries, divergent boundaries and convection currents all examples of physical evidence that supports the theory of plate tectonics. Continental drift is the theory contrived by Alfred Wegener in 1912 that states that Earth’s tectonic plates are in slow constant movement. At the time he didn’t know how the continents moved. The theory was soon modernized in the 50’s and the theory of plate tectonics became was born. Plate tectonics is the theory that tectonic plates are in slow constant movement due to convection currents in the mantle. Now we know for sure, thanks to scientific studies of convergent boundaries, divergent boundaries, and convection currents in the Earth’s mantle, that the continental drift and plate tectonics theories are not