The most difficult rivers of North America riddles A list of rivers of North America related questions that are most often answered incorrectly North America quiz What is the longest river in the United States?Missouri. The Missouri River is the longest river in North America. Having 2,341 mi (3,768 km), it is longer than the Mississippi (2,202 mi 3,544 km). When combined with the lower Mississippi River, it forms the world's third longest river system, after the Nile and Amazon.very hard 25% MississippiMississippi59%MissouriMissouri25%YukonYukon8%Rio GrandeRio Grande6%Created by: Shankar Kumar. Statistics based on 4463 answers in 4 languages »geography of the United States riddles » What is the third longest river of the North America? (after Mississippi and Missouri)Yukon, having 1,979 mi (3,185 km), is just 223 miles shorter than Mississippi. Despite its length, there are only four vehicles-carrying bridges across the river.very hard 30% Rio GrandeRio Grande23%YukonYukon30%ColoradoColorado41%ArkansasArkansas3%Created by: globalquiz.org. Statistics based on 8608 answers in 2 languages »geography of North America riddles » The Elevation of Lake Superior is 183m, Michigan 177m, Huron 176m and Erie 174m. How about Ontario?75m. The gradient between The Great Lakes is generally very shallow. However, the descent between Erie and Ontario is greater than between any of the others, and includes the spectacular Niagara Falls, 51m high.hard 41% 173m173m12%172m172m23%168m168m22%75m75m41%Created by: globalquiz.org. Statistics based on 12445 answers in 2 languages »geography of Canada riddles » Which of the following North American rivers has the lowest discharge?Rio Grande is the fourth or fifth longest river system in North America, but it flows through arid and desert regions. The average discharge is just 82 m³/s (St Lawrence: 10100, Yukon: 6200, Colorado: 1200). It is also very variable, occasionally rising to over 10000 m³/s or dropping to 1 m³/s. During portions of 2001 and 2002 the mouth of the Rio Grande was blocked by a sandbar. hard 41% Rio GrandeRio Grande41%St LawrenceSt Lawrence22%YukonYukon18%ColoradoColorado17%Created by: Riho Ishii. Statistics based on 12410 answers in 2 languages »geography of Mexico riddles » Where is Niagara Falls?At point 3. Located on the Niagara River, which drains Lake Erie into Lake Ontario, the combined falls form the highest flow rate of any waterfall in the world.hard 55% at point 1at point 19%at point 2at point 219%at point 3at point 355%at point 4at point 416%Created by: globalquiz.org. Statistics based on 14884 answers in 2 languages »waterfalls riddles » Which river flows through the Grand Canyon?Colorado River established its course through the canyon at least 17 million years ago. Since then, it exposed about two billion years of the Earth's geological history.very easy 81% Rio GrandeRio Grande14%ColoradoColorado81%SnakeSnake1%SacramentoSacramento1%Created by: globalquiz.org. Statistics based on 16186 answers in 2 languages »rivers riddles » Play North America quiz and see all the questions.