before the bone growth plates have closed. The most common cause of too much growth hormone release is a noncancerous (benign) tumor of the pituitary gland. The consequence is an accelerated growth rate and increased height as well as a number of additional soft tissue changes. * The growth plate‚ also known as the epiphyseal plate or physis‚ is the area of growing tissue near the ends of the long bones in children and adolescents. Each long bone has at least two growth plates: one at each end.
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result of it. The volcanic ash fell as far as San Francisco‚ which is 2‚996.8 miles from Santa Maria. The volcano didn’t calm down until three days after the first roars. The volcano was formed when the Cocos plate converged with the Caribbean plate. The Cocos plate moves under the Caribbean plate this process is called subduction. When Cocos melts‚ hot magma rises
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What is Earth’s mantle? The Earth’s mantle is a roughly 1‚800 mile (2‚900 km) thick shell of compressed and heated rock‚ beginning below the Earth’s crust (lithosphere)‚ which extends 3.1 miles (5 km) below the ocean floor and 19 to 31 miles (30 to 50 km) below the continents. What elements make up the Earth’s mantle? magnesium‚ silicon‚ iron‚ and oxygen Describe the “big splash” theory of the Moon’s origin? The currently accepted hypothesis for the Moon’s origin--which is supported by chemical
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Plate tectonics help us to explain the process of folding. According to the theory of plate tectonics‚ the earth’s crust is broken up into sections called plates. These plates float on the semi-molten mantle. Thermal convection currents in the mantle drag these plates in different directions resulting in tectonic activity. Folding occurs when rock layers that were originally horizontal are bent into a series of wave-like folds. As a result of this collision of the earth’s tectonic plates‚ the
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Prince William Sound‚ 75 miles east of Anchorage. This earthquake was and still is the second larges earthquake ever recorded (Christensen). The plates involved In this major earthquake were the Pacific plate and North American plate. This subduction zone is know as Aleutian-Alaska megathrust zone (Sokolowski). This region was known for its active plate tectonics‚ but this earthquake did come as a surprise to the public and scientists in the area. About 200-250‚000 kilometers squared of the earths
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theory about the formation of the Himalayas started to take shape in the year 1912 when German meteorologist Alfred Wegener developed his Theory of Continental Drift. According to Wegener‚ the earth was composed of several giant plates called tectonic plates. On these plates lie the continents and the oceans of the earth. The continents were said to have formed a single mass at one point in time. From this single mass‚ today’s continents have "drifted" apart from each other over a period of millions
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which underlies the ocean basins and covers 71% of earth’s surface Moving Tectonic Plates * Convection cells or currents move large volumes of rock and heat in loops within the mantle like giant conveyor belts * Flows of energy and heated material in the mantle’s convection cells cause tectonic plates to move extremely slow along earth’s surface * They float on an underlying sea of magna * Plates are composed of the continental and oceanic crust the lithosphere * Typical speed
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Cited: Plate Tectonics. (2005‚ April 28). (Nasa) Retrieved May 13‚ 2012‚ from Earth floor: http://www.cotf.edu/ete/modules/msese/earthsysflr/plates4.html Arctic Refuge drilling controversy. (2011‚ April 2). (Wikimedia Foundation Inc.) Retrieved May 13‚ 2012‚ from Wikipedia: http://en.wikipedia.org/wiki/Arctic_Refuge_drilling_controversy Alfred Wegener. (2012). Retrieved May 13‚ 2012‚ from eNotes: http://www.enotes.com/alfred-wegener-reference/alfred-wegener Glasscoe‚ M. (1998‚ September 8). Plate boundaries
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Geological Hazards Plate Tectonics- Theory Alfred Wegener Crust- Solid Mantle- Liquid Outer Core- Liquid Inner Core- Solid (Too much pressure for it to be liquid. Doesn’t have the space to expand.) Convections cells- Due to the pressure in the earth’s core‚ when it heats up the pressure causes the heat to push against the earth’s mantle‚ triggering it to move‚ caused by convection currents. Convection Currents- it’s a concept of what causes the plate tectonics to move. http://www.scotese
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Geology 122 JAVELOSA‚ Luis Antonio A. 2008-68085 Plate tectonics as expressed in geological landforms and events: An exploration using global data and global visualization tools JAPAN (Convergent): Japan features a very interesting series of geomorphological features. The island lies in the Pacific Ring of Fire that is characterized by having active volcanic and tectonic activity. Due to its geomorphology‚ the area is very vulnerable to environmental hazards such as earthquakes‚ tsunamis‚ and
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