Lucky Koritela #23 The Rock Cycle The rock cycle begins when Earth’s plates shift around leaving gaps in between them making a volcano. The magma under Earth’s crust come through the gap and spill out of the volcano. Then the magma (lava) cools down and hardens into igneous rock. As time passes the igneous rock weathers (using substances such as water) away into little chips. After getting smaller‚ erosion (using elements such as wind) transports the little rocks to different places. The deposition
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scenario is associated with mafic magma? a. hot‚ fluid lava that forms a shield volcano b. hot‚ fluid lava that forms a stratovolcano c. an explosive eruption that ejects pyroclastic materials d. cool‚ viscous magma that forms a shield volcano 6. Which scenario is associated with felsic magma? a. hot‚ fluid lava that forms a shield volcano b. basaltic lava that forms a stratovolcano c. an explosive eruption that ejects pyroclastic materials d. cool‚ viscous magma that forms a shield volcano
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study they found that the moon had many magma rocks on the moon. This fact surprised many scientists because space is very cold (as we all know) and magma rocks are formed from extreme heat or pressure. The magma rocks were only found in certain parts of the moon and not in others. So we know that the whole moon was obviously not all formed by magma rocks. There are many hypotheses‚ it is hard to conduct an experiment on something so far away‚ and these magma rocks had a few scientists thinking hard
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the heated magma to go. When the core gives off the heat energy from radioactive decay and compression‚ it excites the electrons of the magma nearby. The atoms of magma will push away from each other as the electrons jump to new energy levels. This makes the magma near the core much more spread out and lighter than the rest of the magma around it. Gravity pulls on the denser magma harder than the lighter magma. So the denser goes down towards the core and forces the lighter magma out of the
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about the main parts of a volcano and it’s origin. The first main part I will tell you about is the magma chamber. A magma chamber is a large pool of molten rock‚ also called magma‚ sitting underneath the Earth’s crust. The magma chamber can be more than three miles below the Earth’s surface and the magma waits there for the pressure and gases to become too much to stay stable. The magma in the magma chamber is less tense than the mantle surrounding it‚ so it moves toward the surface of the Earth through
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Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks. To begin‚ igneous rocks come from magma‚ and magma is related to plate tectonics. Magmas differ in composition‚ temperature and viscosity. This is a major identifier of igneous rocks‚ is that they were once molten and magma Plate tectonics are the theory that the Earth’s lithosphere‚ which is the outer rigid shell is composed of several different pieces‚ or “plates” that float on a ductile
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underlying semi-molten mantle. These plates are either continental‚ The North American Plate‚ or oceanic‚ The Nazca Plate. Tectonic plates are powered by convection currents‚ which is the circular movement of magma within the mantle. These currents are powered by the core‚ which heats the magma‚ causing it to rise‚ cool and fall back down. This circular motion causes the plates‚ which float on the mantle‚ to move. The individual plates are separated by fault lines which extend from the surface all
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(Cas & Wright‚ 1987): * If the erupted magma contains a high percentage (>63%) of silica‚ the lava is called felsic. * Felsic lavas (dacites or rhyolites) tend to be highly viscous (not very fluid) and are erupted as domes or short‚ stubby flows. Viscous lavas tend to formstratovolcanoes or lava domes. Lassen Peak in California is an example of a volcano formed from felsic lava and is actually a large lava dome. * Because siliceous magmas are so viscous‚ they tend to trap volatiles (gases)
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compression‚ the rocks melt into magma. The melting of rocks intensifies the pressure in the asthenosphere. Cracks develop. When cracks extend downward and reach the magma‚ the pressure of magma is released. Magma then extrudes out of the crust along the cracks to the earth’s surface. It results in vulcanicity. Magma cools and solidifies to form igneous rocks when rises nearer to or above the earth surface. During the cooling process‚ crystallization takes place in magma or lava forming minerals. The
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Volcanoes are big erupting mounting that shoot out hot lava/magma. Volcano eruptions produce a lot of toxic gases which can damage the environment. When a volcano is about to erupt there is rain‚ thunder‚ and lightning. Volcanoes can also be bigger or smaller than a mountain. There are many different types of volcanoes that cause destruction throughout the entire world. Volcanoes occur all over the world anytime of the day. Volcanoes occur at the mid-ocean ridges because they are divergent plate
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