Which describes uniformitarianism? a. the rates of geologic processes slow down with time. b. the rates of geologic change increase with time. c. geologic processes operating now are the same as those that operated in the past. d. geologic processes are different over time.

Which of the following would not be considered a geographic impact on the history of middle and south america? a. the relative geographic isolation of the americas meant that they would be more susceptible to european diseases. b. ernesto “che” guevara's trip throughout south america inspired him to become a revolutionary. c. the tropical climate of north america has encouraged many south american countries to produce goods there. d. the proximity of the united states to middle and south america has strengthened its relationship to the region.