11scienceWhat was the name of the French inventor who, around 1790, invented a machine designed to provide criminals with a humane method of execution?Show AnswerShare
7scienceWhich company in 1935 produced the first color photographic film: America's Kodak, Japan's Fuji, or Germany's Agfa?Show AnswerShare
10scienceThe first vaccine, developed by the English physician Edward Jenner in 1796, protected people against what disease?Show AnswerShare
10scienceNext year (2001) will mark the twentieth anniversary of what great technical innovation: the fax? the microwave? the Sony Walkman? or the IBM personal computer?Show AnswerShare
6scienceIn human reproduction, the X-and Y-chromosomes determine gender. Is the X-chromosome associated with male or female characteristics?Show AnswerShare
9scienceProbably in every room of your home you have examples of what significant invention dating from about 1500 B.C.?Show AnswerShare
16scienceWhat is the name of the figure formed by the seven brightest stars in the constellation Ursa Minor, one of which is Polaris, the North Star?Show AnswerShare
2scienceWhich small, prehistoric flying animal got its name from the Greek words meaning flying finger wing?Show AnswerShare
12scienceWhat is the name of the process by which green plants convert the energy of sunlight into chemical energy?Show AnswerShare
2scienceCan you identify the 2nd century Egyptian astronomer who believed that all heavenly bodies revolve around the earth?Show AnswerShare
