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sodium chloride
(Encyclopedia)sodium chloride, NaCl, common salt. Salt is important in many ways. It is an essential part of the diet of both humans and animals and is a part of most animal fluids, such as blood, sweat, and te...Sheridan, Philip Henry
(Encyclopedia)Sheridan, Philip Henry, 1831–88, Union general in the American Civil War, b. Albany, N.Y. Although not a brilliant general, Sheridan's flair for leadership and his ready fighting ability made him th...Chicago, city, United States
(Encyclopedia)Chicago shĭkäˈgō, shĭkôˈgō [key], city (2020 pop. 2,746,388), seat of Cook co...coal
(Encyclopedia)coal, fuel substance of plant origin, largely or almost entirely composed of carbon with varying amounts of mineral matter. Coal is found in beds or seams interstratified with shales, clays, sands...Carboniferous period
(Encyclopedia)Carboniferous period kärbənĭfˈərəs [key], fifth period of the Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), from 350 to 290 million years ago. The pl...climate
(Encyclopedia)climate, average condition of the atmosphere near the earth's surface over a long period of time, taking into account temperature, precipitation (see rain), humidity, wind, barometric pressure, and ot...Papua, province, Indonesia
(Encyclopedia)Papua ĭrˈēän jīˈyə [key], province (2014 est pop. 3,486,000), 123,180 sq mi (319,036 sq km), Indonesia. Comprising most of the western half of New Guinea and a number of offshore islands, it is...exploration
(Encyclopedia)exploration, travel to a part of the earth that is relatively unknown to the traveler's culture, historically often motivated by a desire for colonization, conquest, or trade. See also space explorati...Missouri, state, United States
(Encyclopedia) CE5 Missouri mĭzo͝orˈē, –ə [key], one of the midwestern states of the United States. It is bordered by Illinois, Kentucky, and Tennessee, across the Mississippi River (E), Arkansas (S), Okla...Iowa, state, United States
(Encyclopedia) CE5 Iowa īˈəwə [key], midwestern state in the N central United States. It is bounded by the Mississippi River, across which lie Wisconsin and Illinois (E); Missouri (S); Nebraska and South Dako...Browse by Subject
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