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rock
(Encyclopedia)rock, aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their o...Baltimore
(Encyclopedia)Baltimore, city (2020 pop. 575,584), N central Md., surrounded by but politically independent of Baltimore co., on the Patapsco River estuary, an arm of...Hundred Years War
(Encyclopedia)Hundred Years War, 1337–1453, conflict between England and France. The Hundred Years War inflicted untold misery on France. Farmlands were laid waste, the population was decimated by war, famine, ...housing
(Encyclopedia)housing, in general, living accommodations available for the inhabitants of a community. Throughout the 19th cent., with the advent of the Industrial Revolution, housing as a problem worsened as urban...Napoleon I
(Encyclopedia) CE5 Napoleonic Europe (1812) Napoleon I nəpōˈlēən, Fr. näpôlāōNˈ [key], 1769–1821, emperor of the French, b. Ajaccio, Corsica, known as “the Little Corporal.” The Napoleonic...Canada
(Encyclopedia) CE5 CE5 Canada kănˈədə [key], independent nation (2020 est. pop. 37,742,154), 3,851,787 sq mi ...states' rights
(Encyclopedia)states' rights, in U.S. history, doctrine based on the Tenth Amendment to the Constitution, which states, “The powers not delegated to the United States by the Constitution, nor prohibited by it to ...Hoover, Herbert Clark
(Encyclopedia)Hoover, Herbert Clark, 1874–1964, 31st President of the United States (1929–33), b. West Branch, Iowa. Except for major speeches before the Republican conventions and a 1938 European tour, Hoove...Madison, James
(Encyclopedia)Madison, James, 1751–1836, 4th President of the United States (1809–17), b. Port Conway, Va. When Jefferson triumphed in the election of 1800, Madison became (1801) his secretary of state. He se...migration
(Encyclopedia)migration, of people, geographical movements of individuals or groups for the purpose of permanently resettling. Normal internal migration has been characterized by a population shift from rural t...Browse by Subject
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