LectureExercisesQuestionAnswera place in a river where the otherwise placid flow is upset by a waterfall, a shallow portion, or the presence of boulderscataractthe name Egyptians gave to the expansive area south of the first cataract and extending into sub-Saharan Africa; it included the Kingdom of KushNubiaPractice this lessonThe content of this course has been taken from the free World History, Volume 1: to 1500 textbook by Openstax