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Seismic Waves Plate Boundaries
1,198 words... dates. An example of the most well known and studied fault is the San Andreas Fault located of the coast of California. The origin of volcanoes: Hot spots, can be found on plate boundaries or inside the plates. The hot spot is a place deep inside the Earth that begins to form molten lava from extreme heat conditions. It will quickly rise up, pushing and melting its way to the surface resulting in a volcano. Because of the constant moving of the plates, the volcano will be carried away from t...
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Tectonic Plates Molten Rock
689 wordsIn 1912, Alfred Wegener, a German scientist, was the first to notice this and develop the theory of plate tectonics. He noticed that the earth's continents fit together almost like a jigsaw puzzle. This, combined with the fact that similar fossils and rock types are found on different continents separated by large bodies of water, helped him formulate his conjecture. He contended that the plates at one point formed one large continent called Pangea, which allowed like fossils and rock types to b...
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Greenhouse Gases Global Warming
1,644 wordsGLOBAL WARMING: A CHILLING PERSPECTIVE Millions of people have been hearing about the greenhouse effect ever since the drought of 1988. It was reported as a threat that loomed in the near future. But the words destined, future and projected were words that could alarm people. Slowly, it ceased to be a fear for the future and became a concern for the present. Global change was a fact of life. Confronted with the catastrophic implications of present data on global warming, the present children wil...
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Oceanic Crust Shield Volcanoes
1,426 wordsVolcanoes Since the beginning of times, volcanoes were something that attracted human attention. Our ancestors often thought of volcanoes as places that powerful gods chose to make their home and they werent far from the truth. Volcano is a powerful exhibition of the might possessed by natural forces and the results of awakening such forces are often devastating. Today, volcanoes are a well-explored natural occurrence and theres even a science, called volcanology, which investigates this phenome...
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Centered Beneath Widespread Damage Earthquake
485 wordsMany geographic and environmental hazards constantly affect and alter the world in which we live. One of the most unpredictable natural disasters to occur is an earthquake. According to Merriam-Webster Collegiate Dictionary, an earthquake is a shaking or trembling of the earth that is volcanic or tectonic in origin. However, the physical causes, economic and social effects, and costs go far beyond just that dictionary definition. A phenomenon known as tectonic forces is generally what causes an ...
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Earth Surface Plate Tectonics
1,732 wordsGive A Concise Account Of Plate Tectonics Give A Concise Account Of Plate Tectonics As They Operate On The Earth? s Surface Today? ? ? ? ? ? ? ? ? ? ? The earth can be divided into concentric layers. These can be distinguished from one another through varying chemical composition, temperature, density and phase. The inner most central body is called the core. This consists of two parts: the inner and outer core. The inner is understood to be solid due to the immense pressures, and the outer core...
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Earth Surface Seismic Waves
2,491 wordsNotes on the lithosphere- (rock sphere) Upper most part is crust of earth. Compiled of rocks of outer crust. Outermost shell. Upper part- rocks we see at and near the earths surface. Crust is 5 to 10 km thick under most oceans and 24 to 60 km thick under the continents. The lithosphere under the crust is solid, dense material. (more dense than surface materials). Lithosphere 100 - 200 km. Notes on the asthenosphere- zone beneath the lithosphere. Thick like tar. Weak because of high temperatures ...
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