“Discuss the Extent to which volcanic and seismic activity are evidence for plate tectonic theory” (40) Plate tectonics is the theory that explains the structure and motion of the Earth’s lithosphere. The theory states that the Earth’s crust is split into large sections called tectonic plates‚ and these move relative to one another creating boundaries at which plates converge‚ diverge and move past each other. Alfred Wegener pioneered the theory of continental drift in the early 1900s which he supported
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Essay Question 1: Compare and contrast the topographical features at divergent and convergent plate margins. Subject: Earth Environments 1: Geomorphology and Soils Course Code: GEOG 1231 Divergent and convergent plate margins are both studied in plate tectonics; which is the study of the plates that makeup the lithosphere‚ their movements and how these movements has influenced changes in the surface’s topography (Strahler‚ 2011‚ 389). The driving force that causes these plate movements is the
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Understanding the Movement of Earth Continental drift is the idea that continents move freely over Earth’s surface‚ changing their positions relative to one another over time. This hypothesis has been around for more than 130 years. It’s amazing to know that once ago these continents on Earth were once joined together and have split and moved apart from one another. In 1596‚ Abraham Ortelius hypothesized that continents “drift”‚ but later a German meteorologist named‚ Alfred Wegener‚ fully developed
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Destructive boundaries are between two plates that are colliding. One type is where the oceanic plate collides with a less dense continental plate. As the oceanic plate is subducted into the upper layers of the mantle‚ various features form. Subduction causes friction to be created by the descending slab of ocean floor‚ generating a lot of heat leading to a partial melting of a plate. The basaltic magma from this old ocean floor is less dense than the magma of the mantle and rises through fissures
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How volcanoes and Earthquakes are formed- Part 1- an introduction to the moving earth PART 1: 1. Review from your 7th grade lessons the layers of the earth‚ from the following website. http://volcano.oregonstate.edu/vwdocs/vwlessons/lessons/Earths_layers/Earths_layers2.html Label the picture below showing which layer is which. Then answer the following questions. QUESTIONS 1. Which layer is the densest? 2. Which layer has the ability to flow? PART 2: 2. Here you will answer the question:
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earthquake compare to that of the 2011 Japan earthquake? Earthquake in Japan was M9‚ and Alaskan was even larger at M9.2‚ which is the 2nd largest earthquake ever recorded. 8. What is the Aleutian trench? Aleutian trench - is a 2‚100 mi subduction boundary between the Northern and the Pacific plates. 9. What tectonic boundary is this similar to? Nazca Plate diving beneath the South American Plate at the Peru-Chili Trench is similar to Aleutian trench. 10. What two strike-slip tectonic
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Compare a continental volcanic arc and volcanic island arc. In a continental volcanic arc mountains formed in part by igneous activity associated with subduction of oceanic lithosphere beneath a continent. In contrast‚ volcanic island arc is a chain of volcanic islands generally located a few hundred kilometers from a trench where active subduction of one oceanic slab beneath another is occurring. Page 334 1.) What is the age of the oldest sediments recovered using deep-ocean drilling? How do the
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GEOLOGY 101 Exam 1 Study Guide Geology | * The science that examines Earth‚ its form and composition‚ and the changes that it has undergone and is undergoing * The processes are slow‚ but none the less dynamic * Physical geology: examines Earth materials and seeks to understand the many processes that operate on our planet * Historical geology: seeks an understanding of the origin of Earth and its development through time | Scientific Method | * It is a rigorous process whereby new
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Plate tectonic theory is a widely excepted theory that the Earth’s lithosphere is made up of plates‚ both oceanic and continental‚ which slowly move due to convection currents in the mantle and the asthenosphere. However‚ it is very hard to be certain as we can’t see the structure of the Earth‚ so some people do not agree with it. This theory saw the introduction of what we know today to be tectonic plates. Tectonic plates occur where there is radioactive decay in the core and temperatures are extremely
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Introduction to Geology GEOL-101 Midterm 1 Review Based on the textbook: Understanding Earth‚ 6th Edition‚ by Grotzinger and Press CH 1: earth system Summary The human creative process‚ field and lab observations‚ and experiments help geoscientists formulate testable hypotheses (models) for how the Earth works and its history. A hypothesis is a tentative explanation focusing attention on plausible features and relationships of a working model. If a testable hypothesis is confirmed by a large
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