(Encyclopedia) jay, common name for a number of birds of the family Corvidae (crows and jays), found in Europe, Asia, and the Americas. The best-known representatives in America are the blue jay,…
by Elizabeth Olson photos by Carol M. Highsmith The U.S. National Park Service was created on August 25, 1916, by President Woodrow Wilson. In 1872, Yellowstone National Park became the…
The Aesthetics of Black and White and ColorMovies and FilmFilm: Aesthetics of Black and White and Color FilmBlitz-Klieg: A Brief History of Black-and-White FilmA Condensed History of ColorThe…
(Encyclopedia) pigment, substance that imparts color to other materials. In paint, the pigment is a powdered substance which, when mixed in the liquid vehicle, imparts color to a painted surface. The…
What is a tsunami? The phenomenon we call tsunami is a series of large waves of extremely long wavelength and period usually generated by a violent, impulsive…
(Encyclopedia) corundumcorundumkərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal…
(Encyclopedia) color, effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different…
OCEAN LIFE SUNLIT ZONE TWILIGHT ZONE DEEP-SEA ZONE WHY IS THE SEA SALTY? WHAT CAUSES THE OCEAN CURRENTS? OCEAN FLOORWAVESFIND OUT MOREEarth’s five oceans (the Pacific, Atlantic, Indian, Southern…
(Encyclopedia) MankatoMankatomănkāˈtō [key], city (1990 pop. 31,477), seat of Blue Earth co., S Minn., at the confluence of the Blue Earth and Minnesota rivers; inc. 1865. It is a trade and…
