GeotchaA geography quiz on a real globe

25 longest rivers of the Yenisei basin

25 rivers, each one drawn on a satellite globe. Name it when it lights up, find it when you are given its name, or type every one you can remember in Name all.

Free to play, with no account needed. What you miss comes back for review until it sticks.

The rivers

  1. 1Yenisei3,487 km
  2. 2Nizhnyaya Tunguska2,989 km
  3. 3Podkamennaya Tunguska1,865 km
  4. 4Angara1,779 km
  5. 5Uda1,203 km
  6. 6Orkhon1,124 km
  7. 7Selenga1,024 km
  8. 8Kureyka888 km
  9. 9Khilok840 km
  10. 10Biryusa830 km
  11. 11Chikoy769 km
  12. 12Kochechum733 km
  13. 13Chunya727 km
  14. 14Tuul704 km
  15. 15Sym694 km
  16. 16Nepa683 km
  17. 17Little Yenisey680 km
  18. 18Chadobets647 km
  19. 19Bolshaya Kheta646 km
  20. 20Turukhan639 km
  21. 21Oka (Angara)630 km
  22. 22Kan629 km
  23. 23Ilimpeya611 km
  24. 24Nizhnyaya Baikha608 km
  25. 25Bolshoy Yenisei605 km

Length in km as Wikidata records it (P2043, the best-ranked figure). Each named river counts on its own: the river that carries the name, from its source to its mouth. Headstreams and tributaries with names of their own are rivers of their own, so the Missouri and the Mississippi are two rivers here, as are the Irtysh and the Ob (the Longest River Systems set measures such chains as one system, from the most distant source). A named section of a river is that river: the Solimões, as the Amazon’s upper course is called in Brazil, is the Amazon. Where the recorded length runs from a differently named headwater (the Congo’s from the Lualaba’s source), the course is drawn on up that headwater. Rivers under 200 km are in only when they are well known (30 or more Wikipedia editions), and a river whose mapped course covers under half its recorded length is left out. Rivers in Antarctica are left out unless the quiz includes Antarctica. The Yenisei basin: the Yenisei and every river here that flows into it, directly or through other rivers and lakes, following where Wikidata says each river flows (P403) downstream.

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