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Bibliography: “." World of Earth Science. . Encyclopedia.com. 12 Jan. 2021 .” Encyclopedia.com, Encyclopedia.com, 12 Feb. 2021, www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/rapids-and-waterfalls. “How Do Rapids Form in a River?” Whitewater Guidebook, 12 Nov. 2020, www.whitewaterguidebook.com/how-do-rapids-form-in-a-river/. National Geographic Society. “Rapids.” National Geographic Society, 9 Oct. 2012, www.nationalgeographic.org/encyclopedia/rapids/. “Rapids.” World Landforms, worldlandforms.com/landforms/rapids/.