GeotchaA geography quiz on a real globe

20 longest rivers of the Rhine basin

20 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. 1Rhine1,233 km
  2. 2Moselle544 km
  3. 3Main524 km
  4. 4Neckar362 km
  5. 5Aare295 km
  6. 6Lippe255 km
  7. 7Saar246 km
  8. 8Lahn242 km
  9. 9Ill217 km
  10. 10Ruhr217 km
  11. 11Sauer173 km
  12. 12Kocher168 km
  13. 13Reuss159 km
  14. 14Sieg155 km
  15. 15Limmat140 km
  16. 16Saane/Sarine126 km
  17. 17Pegnitz113 km
  18. 18Alzette73 km
  19. 19Ill (Vorarlberg)72 km
  20. 20Regnitz59 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 Rhine basin: the Rhine 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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