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classification
(Encyclopedia) CE5 classification, in biology, the systematic categorization of organisms into a coherent scheme. The original purpose of biological classification, or systematics, was to organize the vast number...flotation process
(Encyclopedia)flotation process, in mineral treatment and mining, process for concentrating the metal-bearing mineral in an ore. Crude ore is ground to a fine powder and mixed with water, frothing reagents, and col...aureole, in physics
(Encyclopedia)aureole ôrˈēōlˌ [key], in physics, luminous circle seen when the sun or other bright light is observed through a diffuse medium, i.e., smoke, thin cloud, fog, haze, or mist. It sometimes occurs a...time , sequential arrangement of all events
(Encyclopedia)time, sequential arrangement of all events, or the interval between two events in such a sequence. The concept of time may be discussed on several different levels: physical, psychological, philosophi...Wu, Chien-Shiung
(Encyclopedia)Wu, Chien-Shiung chyĕnˈ-shyo͝ongˈ wo͞o [key], 1912–97, Chinese-American physicist. She emigrated to the United States from China in 1936 and received a Ph.D. from the Univ. of California, Berke...detergent
(Encyclopedia)detergent dētûrˈjənt, dĭ– [key], substance that aids in the removal of dirt. Detergents act mainly on the oily films that trap dirt particles. The detergent molecules have a hydrocarbon portion...clay
(Encyclopedia)clay, common name for a number of fine-grained, earthy materials that become plastic when wet. Chemically, clays are hydrous aluminum silicates, ordinarily containing impurities, e.g., potassium, sodi...Charpak, Georges
(Encyclopedia)Charpak, Georges zhôrzh shärpäkˈ [key], 1924–2010, French physicist, b. Dąbrowica, Poland (now Dubrovytsia, Ukraine), Ph.D Collège de France, 1954. Affiliated with CERN (1959–91), Charpak wo...Golgi, Camillo
(Encyclopedia)Golgi, Camillo kämēlˈlō gôlˈjē [key], 1844–1926, Italian physician, noted as a neurologist and histologist. He shared with Ramón y Cajal the 1906 Nobel Prize in Physiology or Medicine for wo...arithmetic
(Encyclopedia)arithmetic, branch of mathematics commonly considered a separate branch but in actuality a part of algebra. Conventionally the term has been most widely applied to simple teaching of the skills of dea...Browse by Subject
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