SCI/245 Robert Dillon Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks. The role of plate tectonics in the origin of igneous rock is extremely important. Igneous rock is formed from magma that reaches the continental and oceanic crust or through hot spots that are around the world. There are three different places where igneous rocks can form; where the lithospheric plates pull apart at mid ocean ridges‚ where plates come together at
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What is Volcanic Eruption? A volcano can be simply defined as a rupture or an opening on the crust of a planet like earth. This opening allows hot ash‚ molten rock and gases to blow off from the underground spaces. Volcanoes generally acquire shape of a mountain. Volcanoes are usually found at places where tectonic plates get converged or diverged. But there existence at a particular place depends upon many environmental and geological factors. Volcanoes can also occur at a place because of
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heat energy produced from radioactive decay in the earth’s core. As the convection currents move the plates away from each other‚ there is a weaker zone in the crust and an increase in heat near the surface. The hotter‚ expanded crust forms a ridge. Magma rises up from the mantle in the gap. The lava cools‚ solidifies and forms a chain of volcanic mountains thousands of miles long down the middle of the ocean eg. Atlantic. There are transform faults at right angles to the ridge. The movement of these
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red-hot liquid rock‚ called magma inside the earth’s core. Volcanoes erupt when magma rises to the surface of the earth‚ which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain‚ and it eventually explodes. When the magma bursts out of the earth‚ it is called lava. The type of magma in the earth can create different volcanoes. If the magma is quite thin‚ the gas can escape easily and there will not be an explosion. The magma just comes out of the mountain
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folding Hawaiian volcanoes are shield volcanoes (no explosivity‚ etc.) Collymer joints are formed by magma crystallizing… What is the earth made of? Sediments can form from pre existing rocks‚ they collect and undergo a process called lithification‚ then form layered rocks The crust of the earth is largely covered up with sedimentary rocks When sedimentary rocks melt they become magma. Magma can undergo crystallization‚ forming igneous rocks (intrusive or extrusive) The igneous rocks may encounter
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Earth’s Composition The Lesson Activities will help you meet these educational goals: Science Inquiry—You will view graphic information‚ draw conclusions‚ and communicate your conclusions in written form. STEM—You will use scientific tools and knowledge to analyze real-world situations and gain insight into careers in science‚ technology‚ engineering‚ and math. 21st Century Skills—You will employ online tools for research‚ communicate effectively‚ and assess and validate information. ____
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Alternative Energy Sources In our homes‚ at our workplaces‚ and in our leisure‚ humans consume energy in every activity at alarming and around the clock pace. We have past the days of wind-up clocks and toys‚ foot-pedaled big wheels‚ and hand-cranked cars. Today‚ everything we operate comes fully loaded with all the ‘bells and whistles’‚ neon lights‚ and fancy remote functions. But at what price is this costing us‚ our environment‚ and our future. Alternative energy sources‚ also known as renewable
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Being so close to an active volcano poses many risks to communities. Even though Mount St. Helens erupted over 30 years ago we know that it is still an active volcano. Future eruptions can kill and injure entire communities. Since the eruption in May of 1980 of Mount St. Helens‚ geologists have come to a better understanding of both the mechanics of volcanoes and the dangers they present to the environment and communities. Did you know that volcanic ash is actually small glass particles? Or that
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volcano. At Mount Pinatubo‚ scientists recorded a landslide‚ some local earthquakes‚ and a short-lived increase in steam emissions from a pre-existing geothermal area‚ but otherwise the volcano seemed to be undisturbed. In March and April 1991‚ however‚ magma started rising towards the surface from more than 20 miles (32 kms.) beneath Pinatubo. This triggered more small earthquakes and caused powerful steam explosions that blasted three craters on the north side of the volcano. Thousands of small earthquakes
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volcanoes‚ tsunamis‚ and earthquakes. Importantly‚ volcanic eruptions are caused by changes in the Earth’s crust. Just outside Rome‚ there are volcanic hills called Colli Albani. Below Colli Albani‚ the crust has been moving‚ allowing magma to flow up to the magma
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