conical volcano composed of many layers of hardened lava‚ tephra‚ and volcanic ash. These kinds of volcanoes are characterized by a steep profile and periodic‚ explosive eruptions. 8. Composition of the igneous rock or magma (andesitic‚ basaltic‚ etc.) - The source magma of this volcano is classified as acidic‚ having high to intermediate levels of silica (as in rhyolite‚ dacite‚ or andesite). 9. Temperature (if available). - The measured temperature for the Tungurahua dome material were
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o manage How to Manage Crisis in Business Communication By Lauren Nelson‚ eHow Contributor * * * * Print this article Responding to a crisis with business communication takes a level head and preparation. In a world where unethical business practices and natural disasters place increased scrutiny on today’s companies‚ the ability to communicate effectively with employees‚ shareholders and the public during a crisis has become a critical aspect of any successful
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Natural Hazards What is a natural hazard? A natural hazard is a naturally occuring physical event which poses a threat and negatively impacts people and the environment. Examples of natural hazards are: earthquakes‚ tsunamis‚ wildfires‚ floods‚ volcanic eruptions etc. Earthquakes and their Occurence What is an Earthquake? An earthquake is a sudden rapid vibration along the earth’s crust due to individual tremors‚ sometimes causing great destruction to the earth’s lithosphere and its inhabitants
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Benefits …………………………… 11 a. Tourism …………………………… 11 b. Environment …………………………… 13 III. Conclusion …………………………… 15 IV. Bibliography …………………………… 17 Introduction The term volcano can either mean the vent from which magma erupts to the surface‚ or it can refer to the landform created by the solidified lava and fragmental volcanic debris that accumulate near the vent. One could say‚ for example‚ that large lava flows are erupted from Kilauea volcano in Hawaii‚ the world
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Geology Final exam Review EXAM 1 1. What is a mineral? A mineral is a naturally-occurring‚ inargonaic‚ crystalline solid with a definite chemical composition and characteristic physical properties. 2. What are eight chemical elements that make up over 99 percent of Earth’s crust? Oxygen (O)‚ Silicon (Si)‚ Aliminum (Al)‚ Iron (Fe)‚ Calcium (Ca)‚ Sodium (Ca)‚ Potassium (Na)‚ Magnesium (K) 3. What are six fundamental geologic principles which are used in relative dating? Superposition‚ original
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surface. Tsunamis can also be caused by underwater volcanic eruptions. Volcanic eruptions are another natural disaster‚ and they are caused by magma escaping from inside the earth. An explosion takes place‚ releasing the magma from a confined space‚ which is why there are often also huge quantities of gas and dust released during a volcanic eruption. The magma travels up the inside of the volcano‚ and pours out over the surrounding area as lava. One of the most
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Continental drift The broad shape of Australia and its distinctive landforms have been influenced over long periods by earth movements that cause the breaking and bending of the Earth’s crust. Geographers call these movements tectonic processes. The Earth’s crust is made up of many individual moving pieces called tectonic plates. There are nine large plates and about a dozen smaller ones. The larger plates contain the continents and oceans. These plates ‘float’ on the dense layer of rock below
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Energy Alternatives: * Alternative energy is any energy source that is an alternative to fossil fuel. In a general sense in contemporary society‚ alternative energy is that which is produced without the undesirable consequences of the burning of fossil fuels‚ such as high carbon dioxide emissions‚ which is considered to be the major contributing factor of global warming. * This chapter discussed only a few of the possible alternatives to our current combustible energy generation system
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Mount Etna 10‚922Ft (3329 meters) LOCATED IN ITALY : 37.73°N 15.00°E LAST ERRUPTED IN January 12‚ 2011 Mount Etna is one of the most active volcanoes in the world and is in an almost constant state of activity. Due to its history of recent activity and nearby population‚ Mount Etna has been designated a Decade Volcano by the United Nations. From about 35‚000 to 15‚000 years ago‚ Etna experienced some highly explosive eruptions‚ generating large pyroclastic
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Earth’s four spheres Hydrosphere - dynamic mass of liquid that is always on the move Oceans - the most prominent feature of the hydrosphere 71% of Earth’s surface is covered by ocean which is 97% of Earth’s water Only 3% is fresh water - streams‚ lakes‚ glaciers and underground supplies Water Cycle - constantly recycles water Atmosphere Provides us with the air we breathe Protects us from the sun’s intense heat and radiation Protects us from space Biosphere Includes all life on Earth Interacts and
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