The initial theory of continental drift was put forward by a German meteorologist Alfred Wegener in 1915. This theory did not seem credible until it was connected with the plate tectonic theory in the mid 1960’s. The Tectonic plate theory had an advantage over previous predictions as it could be supported by observed occurrences. One such thing that supports these two theories is that seen from space the continents look as if they might once have been joined together. This possible idea was then
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(centered in Nevada this area is about 1500 kilometers wide and runs about 4000 kilometers North/South). Continental crust is thickest beneath mountain ranges and extends into the mantle. Plate Tectonics * The Earth’s surface is made up of a series of large plates (like pieces of a giant jigsaw puzzle). * These plates are in constant motion travelling at a few centimetres per year. * The ocean floors are
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Question 1 | | | | Correct. | | | Movements and interactions in the lithosphere and the internal Earth processes that drive them are referred to as the _____ cycle. | hydrologic | | metamorphic | | tectonic | | rock | Question 2 | | | | Correct. | | | The model that describes the movement of water through the reservoirs of the Earth System is called the _____ cycle. | rock | | hydrologic | | metamorphic | | tectonic | Question
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suggested by Alfred Wegner as part of his wider theory on plate tectonics. The plate tectonic theory suggested by Alfred Wegner in 1915 was that millions of years ago all the continents were joined together in one mass of land called ‘Pangaea’‚ the evidence for this was that coal was found on Antarctica‚ the shape of Africa and south America fit together and same fossils were found on different continents. This theory is used to explain the distribution of earthquakes‚ volcanoes and Fold Mountains
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Have you ever wondered how you could compare continental drift‚ sea-floor spreading‚ and plate tectonics? Well there are actually plenty of ways to compare these three topics in earth science. You could compare these topics in similarities; continental drift and plate tectonics both start on the same basis of idea‚ that Earth’s lithosphere is made up of tectonic plates. You could also state some differences‚ such as continental drift occurs on all plate types‚ but sea-floor spreading only takes place
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Plate Tectonics Plate Tectonics The theory of plate tectonics was developed in the 1960’s and states that the earth is broken into a number of shifting plates. Plate tectonics also provides geology with a comprehensive theory of how the earth’s crust moves. In this essay I will explain the different types of plate movements‚ how the plates move and how this movement affects earthquakes and volcanoes. To begin‚ there are three different types of plate movement; divergent boundaries‚ convergent
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‘Volcanic and seismic events are major pieces of evidence towards proving that plate tectonics theory is valid.’ Discuss the extent to which you agree with this statement. (40 marks) Over the years proceeding the birth of the theory‚ increasingly convincing evidence has been gathered for proof of the theory of plate tectonics. In 1912‚ Alfred Wegner proposed the theory that continents are sat upon tectonic plates and that these plates are slowly drifting around the Earth (continental drift).
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HOW TO EVALUATE A THEORY The purpose of a good theory is to provide a conceptual framework for viewing and understanding phenomena. From this perspective a theory is either useful or not useful. A theory helps guide and focus attention‚ identify and define important variables‚ and postulate the relationships among them. A good theory is not just another ’good idea‚’ but it is based on empirical data that makes it an adequate map of the territory for the current time. Furthermore‚ a good theory
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it is made up of large plates beneath the crust and when the plates move‚ it changes the surface. There are four types of plate boundaries and they are divergent boundaries‚ convergent boundaries‚ transform boundaries‚ and plate boundary zones. Convergent boundaries are where the crust is broken‚ and one plate goes over it‚ divergent boundaries is where new plates are created while the plates pull away‚ transform boundaries is where the crust may be produced or more‚ plate boundary zones are boundaries
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Evaluate the usefulness of Marxist theory to our understanding of crime and deviance (40 marks) Synopticity - Crime & Deviance sociological theory Marxist explanations of crime and deviance‚ like their work on other areas like the family and education‚ rest on an economic and structural analysis of society that sees a class struggle between the proletariat and the bourgeoisie. This struggle comprises the attempts by the proletariat to free themselves from the domination of the bourgeoisie
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