eruptions. When magma forces its way up to the crust of the earth‚ this causes an eruption (Langley‚2006). Therefore‚ the more scientists learn about magma‚ the more they learn about eruptions. During certain eruptions‚ up to 1.5 million tons of lava can be spewed per second(Heenan‚2014). This shows scientists how dangerous volcanoes can be. Debris and smoke shoot out of the volcano right before it erupts (A+E network‚2010). It would seem that this is enough warning that the volcano is going
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Rock Extrusive rocks are also called volcanic rocks and extrusive rocks are formed on the earth’s surface. Extrusive rocks also form from magma‚ but a form of lava. Magma flows onto the earth’s surface by an eruption by a volcano. When the magma hits the earth’s surface‚ the magma turns into lava. Extrusive rocks are formed by lava‚ and the lava will harden quickly and crystallize quickly‚ either by hot spots or on the earth’s surface. Igneous rocks are considered felsic‚ intermediate‚ mafic‚ and ultramafic
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particles? Or that the majority of volcanoes are submarine? Understanding some of these different facts can help us to understand the earth’s volcanic processes. Volcanoes erupt different materials and those can become different after cooling. Things like lava‚ gases
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Epigenetics has changed the way scientists have originally viewed the way people act based on nature and nurture. Identical twins and mice are a good example of this. Biologists have questioned how identical twins that have the same DNA can end up with different traits. For example one twin could develop bipolar disorder and the other twin is uneffected. So how does this happen when they have the same DNA? The answer is epigenetics. Histones have DNA wrapped around them to keep the DNA
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Creation of Oahu by Volcanism Karen Ta: 430 BOT 450 TR 10:30-11:20 Volcanoes are magnificent formations from an opening in a planet’s crust. They form when magma‚ volcanic ash‚ and gases escape from a magma chamber below the surface of the planet. Tectonic plates cover the surface of the planet and are constantly moving. Volcanoes are generally found where these plates converge or diverge. Not only are volcanoes found in these areas but also where the Earth’s crust is stretching or thinning
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As the pockets get cool slowly‚ the magma turns into the Igneous rocks. Igneous rocks can also be formed when the volcanoes erupt. In this time‚ the magma rise above the surface of the Earth‚ When the magma comes above the Earth‚ it is known as the Lava. After that‚ the magma or lave spreads on the ground and get cool. This way‚ the Igneous rocks get formed. All the Igneous rocks do not get cool in the same way‚ as a result‚ all these rocks don’t look the same. The rocks can be classified according
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infrastructure are known as natural hazards. Volcanic eruptions can swiftly become natural hazards which can quickly lead to major loss of life and widespread damage. Primary hazards that are associated with volcanoes include; pyroclastic flows‚ Tephra‚ Lava flows and volcanic gases. Pyroclastic flows are waves of very hot gases and tephra with flow with high velocities. The pyroclastic flow that was seen at the eruption of Mount St Helens‚ USA in 1980 was a result of dense gas and ash combinations. It
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surface. Extrusive: Igneous rock that forms at the Earth Surface. Felsic: Igneous rock rich in potassium feldspar and quartz and light color. Mafic: Igneous rocks that are rich in dark Plagioclase feldspar‚ pyroxene and that are dark in their color. Lava: Magma that reaches Earth surface. Texture: The feel of a rock due to its size‚ shape and its arrangement of mineral crystal or sediment in a rock. Porphyry: Igneous rock containing coarse crystals in a finer grained groundmass
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one reaching the surface. During volcanic eruption‚ most of the lava ejects through the main vent. The third main part I will tell you about is the secondary vent and cone. The larger volcanoes can have more than one vent for the magma to reach the Earth’s surface. Secondary vents‚ with the main vent‚ are a way for the magma to move and reach the surface during volcanic eruption causing unforeseen dangerous situations when the lava flow suddenly widens or starts to flow to a different direction
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Pressure- results from a force pushing on an area Crust-contains land and ocean floor (50-70 km); solid Mantle-2867 km; solid Lithosphere-crust and uppermost part of the mantle; solid Asthenosphere-soft layer within the mantle Outer core-2‚266 km; liquid Inner core-1‚216 km; solid Pangaea-“super continent”‚ when all continents were connected Subduction-when one continental plate slides under another‚ at a deep-ocean trench Deep-ocean trench-a place in the ocean where subduction occurs Mid-ocean
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