Consider the following two fractions:1/2 and 2/4 These fractions are equivalent fractions. They both represent the same amount. One half of an orange is equal to two quarters of an orange. However…
(Encyclopedia) copper sulfate, common name for the blue crystalline heptahydrate of cupric sulfate, in which copper has valence +2. It may also refer to cuprous sulfate (Cu2SO4), in which copper has…
(Encyclopedia) coffee tree, Kentucky, common name for the plant species Gymnocladus dioica, a tree of the family Leguminosae (pulse family) and native to the E United States. The seeds of the woody…
(Encyclopedia) Patroon painters, group of portraitists active in colonial New York from 1715 to 1730. Their work embodied the first clearly American style. The Patroon painters served the Dutch…
(Encyclopedia) Bunsen burner, gas burner, commonly used in scientific laboratories, consisting essentially of a hollow tube which is fitted vertically around the flame and which has an opening at the…
(Encyclopedia) darter or anhingadarterănhĭngˈgə [key], common name for a very slender, black water bird very closely related to the cormorant. It frequents the wooded borders of freshwater lakes,…
(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) isoplethisoplethīˈsəplĕthˌ [key], line drawn on a map through all points of equal value of some measurable quantity. In many meteorologic, oceanographic, or geologic studies some…
(Encyclopedia) guinea fowlguinea fowlgĭnˈē [key], common name for any of the seven species of gallinaceous birds of the family Numididae, native to Africa and Madagascar. The helmeted guinea fowl,…
(Encyclopedia) Arabian horse, breed of light horse developed in Mesopotamia and N Africa, and probably the first true domesticated breed. Prized since earliest times for its superior beauty, spirit,…
