buoyant magma. Ultimately this magma rises towards the surface and accumulates in a reservoir‚ known as the magma chamber. The eruption occurs when the pressure within in the chamber surpasses the pressure of the upper rock‚ magma forces its way through the cracks in Earth’s crust. Magma that is low in gas and silicon dioxide produces thin quickly spreading lava which has a low viscosity‚ while a magma that is heavily composed of gas and silicon dioxide will yield a thick‚ viscose magma. The thicker
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ESS 101 Midterm Review 1. You should be familiar with the formation of the Earth and Solar System. What evidence is used to support the contention that the solar system formed from a rotating nebular dust cloud? 2. How does the earth become compositionally zone? You should have knowledge of the 6 evolutionary stages that show how the earth could evolve from a "homogeneous mixture of primordial dust (planetesimals) to the compositionally zoned planet containing an Fe-Ni core‚ Fe-Mg silicate
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EAR 105 extra-credit study guide. This is both a study guide and an extra credit assignment worth 10 points on your exam! Using your class notes and the book‚ please answer the following questions with words or with sketches. Use this as a study guide. Remember‚ it will count as extra credit toward your test grade. You may work in groups of 4 or less. If you do work in groups‚ all names go on ONE copy that is handed to me. You may work on separate sheets of paper‚ or answer using this document
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creates convection currents in the liquid outer core and mantle. These convection currents move the tectonic plates on top of them. Pumas The Parts were convectional current moves towards the surface are called plumes. Plumes bring magma to the earth surface. If magma breaks through the crust it erupts as lava in a volcano. Pangaea The continents were once all joined together which formed a super continent called Pangaea. We know this as identical fossils and rocks have been found in western Africa
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diverge leaving magma to rise up. This with aid from the cool ocean water solidifies and creates gentle sloping volcanos with basic basaltic lava with low viscosity. The type of volcanoes found at these margins are shield and fissure volcanoes. At this specific plate margin‚ at the point of diverging‚ a mid-Atlantic ridge occurs. This is where magma has risen through the gap and solidified hitting the cool water‚ forming in this case the longest mountain range in the entire world. Where magma fills the
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Phonolite‚ the white phenocrysts are made up of feldspar. Smaller black phenocrysts may be made up of augite. These crystals were formed when the magma‚ that formed the tower and deep underground‚ cooled slowly. The magma‚ including phenocrysts‚ moved upward until about a mile below the surface‚ and then formed the rest of the crystals. The rest of the magma cooled quickly‚ at cooler temperatures‚ and formed the aphanitics. Aphanitics are gray rocks‚ with fine-grained texture‚ around the
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the constant release of gas from the magma. As the gas escapes‚ it produces tephra that piles up‚ turning into a cinder cone. Strombolian eruptions happen when sticky magma plugs the central vent. This makes the magmatic gas build up pressure until it blasts. The magma is turned into volcanic dust and bombs. Vulcanian eruption which comes from the ancient Roman belief‚ are more violent than the strombolian eruption. Vulcanian eruption happens and brings magma which is more viscous. Vulcanian explosions
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Hawaii where the plate boundary is underneath a hot spot‚ which causes the Hawaiian chain islands. It is where the magma in the mantle breaks through the lithosphere to form extrusive landforms. Shield volcanoes can be formed due to subduction and they tend to start of as a submarine volcano (under water) at either an oceanic/ oceanic convergence or a hotspot. At a hotspot‚ the limited magma plumes rise and go in a circular motion due to the convection currents‚ this eventually lead to the plumes rising
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I. The Story of Baseball Player A. Magma Mike 1. Magma Mike was a rookie just starting out in the Rocky League Baseball. 2. He played not too much and was mainly a bench warmer. 3. He cooled and hardened‚ improved on his skills and became known as Igneous Iggy. B. Igneous Iggy 1. Igneous Iggy was a shortstop playing for the Seattle Sedimentaries.. 2. He was a 10 year pro and hit 46 Rbi’s‚ and 15 Homeruns
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Respiration‚ digestion and rocks Respiration Respiration is a chemical reaction that happens in all living cells. It is the way that energy is released from glucose‚ for our cells to use to keep us functioning. Remember that respiration is not the same as breathing (which is properly called ventilation). The glucose and oxygen react together in the cells to produce carbon dioxide and water. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Digestion
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