Volcanoes A volcano is an opening‚ or rupture‚ in the surface or crust of the Earth or a planetary mass object‚ which allows hot lava‚ volcanic ash and gases to escape from the magma chamber below the surface. The word volcano is derived from the name of Volcano‚ a volcanic island in the Aeolian Islands of Italy whose name in turn originates from Vulcan‚ the name of a god of fire in Roman mythology. The study of volcanoes is called volcanology. Divergent plate boundaries: At the mid-oceanic ridges
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where plates move against or over each other‚ or dive back below the surface. As the plates move‚ mountains are uplifted‚ the sea floor cracks and spreads‚ volcanoes erupt‚ and new land is formed. I think that volcanoes present the greatest challenges to human. And I will try to explain my point of view. As I have already mentioned volcanoes can form a new lands‚ without them we would not have Hawaii Iceland and many other most magnificent places in the world. On the other hand‚ volcanic eruptions
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Volcanoes Joy Allen EVS1001 T 5:30 March 26th 2013 In this essay I will describe how volcanoes affect our environment. They both positively and negatively impact our world. I lived on the big island of Hawaii for a while‚ and got to experience firsthand the power of the volcanoes. I walked through lava tubes‚ dormant craters‚ and even watched red hot lava slither down the side of Kilauea and into the Pacific Ocean. They have fascinated me ever since. What is a volcano? “Volcanoes are awesome
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VOLCANOES Volcanoes are pressure valves that release energy from deep within the Earth.Beautiful and powerful‚awe-insipiring and deadly‚they are spectacular reminders of the dynamic forces that shape our planet. Volcano - a fissure or vent through
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Sadia khan Per 4 3/12/12 Volcano internet assignment 1. Three types of volcanoes are the shield volcano‚ Strato Volcano’s and cinder cones .The Shield volcanos are usually built entirely from lava flow they are name for their large size and low profile. The Starto’s volcano’s have steep sides with cones that stick out like huge bumps. They are built up when eruptions of viscous lava‚ tephra‚ and pyroclastic flows happen. The Cinder cones is a steep conical hill of tephra that accumulate
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Volcanoes Of the many natural forces which have defined the Western United States and Canada‚ volcanoes are among the most dramatic. Five of these natural wonders find their homes in National Parks‚ ranging from Hawaii to British Columbia. Their eruptions occur on mountains on the Ring of Fire‚ when one portion of the earth’s crust slides beneath another‚ and melts under high heat and pressure. Magma erupts from beneath the surface and cause lakebeds‚ mountain peaks and huge boulders.
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exaggerated): 1. Large magma chamber2. Bedrock3. Conduit (pipe)4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15. Ash cloud Why do volcanoes erupt? Hot melted rocks collect under the Earth’s surface and when the pressure becomes too hard‚ the Earth’s skin breaks‚ and a volcano erupts. The melted rock inside the Earth is called magma‚ but when it comes out in an eruption‚ it is called
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VOLCANOES Most people have never seen a real volcano but have learned about them through movies or books. So when most people think of a volcano‚ they usually conjure up the Hollywood version: a huge‚ menacing conical mountain that explodes and spews out masses of lava which falls on rampaging dinosaurs‚ screaming cave people‚ or fleeing mobs of betogaed Romans - depending on their favorite volcano disaster movie. While those types of volcanoes do indeed exist‚ they represent only one "species"
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Introduction A volcano is an opening‚ or rupture‚ in a planet’s surface or crust‚ which allows hot magma‚ volcanic ash and gases to escape from the magma chamber below the surface. How is a volcano formed? Most volcanoes are formed by the movement of tectonic plates on the surface of the earth. These plates are basically huge pieces of rock that ‘float’ on the mantle (a layer of the earth that is sort-of liquid rock). The tectonic plates are in constant motion‚ albeit very slow motion. They sometimes
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experience; one that has inspired fear‚ superstition‚ worship‚ curiosity‚ and fascination throughout the history of mankind. The active Hawaiian volcanoes have received special attention worldwide because of their frequent spectacular eruptions‚ which can be viewed and studied with a relative ease and safety. The island of Hawaii is composed of five volcanoes‚ three of which have been active within the past two hundred years. Kilauea’s latest eruption still continues as of today. Mauna Loa’s latest
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