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El Niño

El Niño & La Niña (El Niño-Southern Oscillation) El Niño /ɛl ˈniːnjoʊ/ (Spanish pronunciation: ) is the warm phase of the El Niño Southern Oscillation (commonly called ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (between…

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Enhanced Fujita Scale

Enhanced Fujita Scale The Enhanced Fujita scale (EF-Scale) rates the intensity of tornadoes in the United States and Canada based on the damage they cause. Implemented in place of the Fujita scale introduced in 1971 by Tetsuya Theodore Fujita, it began operational use in the United States on February…

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Fujita Scale

Fujita Scale The Fujita scale (F-Scale), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists and engineers after a ground or aerial damage survey, or…

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Oil Shale

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1ShareOil Shale Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons, called shale oil (not to be confused with tight oil—crude oil occurring naturally in shales), can be produced. Shale oil is a substitute for conventional crude…

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OPEC

OPEC History: The Organization of the Petroleum Exporting Countries (OPEC) is a permanent, intergovernmental Organization, created at the Baghdad Conference on September 10–14, 1960, by Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. The five Founding Members were later joined by ten other Members: Qatar (1961); Indonesia (1962) – suspended…

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Periodic Table

Periodic Table The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties. This ordering shows periodic trends, such as elements with similar behaviour in the same column. It also shows four rectangular blocks with some approximately similar…

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Saffir–Simpson Scale

Saffir–Simpson Wind Scale The Saffir–Simpson hurricane wind scale (SSHWS), formerly the Saffir–Simpson hurricane scale (SSHS), classifies hurricanes – Western Hemisphere tropical cyclones that exceed the intensities of tropical depressions and tropical storms – into five categories distinguished by the intensities of their sustained winds. To be classified as a…

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Tornado

Tornado A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. They are often referred to as twisters, whirlwinds or cyclones, although the word cyclone…

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Tungsten

Tungsten Tungsten, or wolfram, is a chemical element with the symbol W and atomic number of 74 in the periodic table. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, from tung sten “heavy stone”. Tungsten is a rare metal found naturally on Earth…

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