GeotchaA geography quiz on a real globe

25 longest rivers of the Kolyma 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. 1Kolyma2,129 km
  2. 2Omolon1,114 km
  3. 3Maly Anyuy738 km
  4. 4Bolshoy Anyuy654 km
  5. 5Sededema567 km
  6. 6Ozhogina523 km
  7. 7Beryozovka517 km
  8. 8Korkodon476 km
  9. 9Yasachnaya441 km
  10. 10Buyunda434 km
  11. 11Bulun428 km
  12. 12Kyllakh423 km
  13. 13Oloy414 km
  14. 14Omulyovka410 km
  15. 15Kulu384 km
  16. 16Popovka356 km
  17. 17Balygychan352 km
  18. 18Sugoy347 km
  19. 19Syapyakine301 km
  20. 20Zyryanka299 km
  21. 21Kedon296 km
  22. 22Bakhapcha291 km
  23. 23Pogynden281 km
  24. 24Aly-Yuryakh254 km
  25. 25Rassokha254 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 Kolyma basin: the Kolyma 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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