The fostered the Scientific Revolution. The invention of navigational devices such as the astrolabe, caravel, and magnetic compass led to technological improvements. It increased world exploration, which improved economic conditions and .

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire