GeotchaA geography quiz on a real globe

19 longest tributaries of the Irtysh

19 tributaries, 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 tributaries

1. 1Ishim2,450 km
2. 2Tobol1,591 km
3. 3Demyanka1,160 km
4. 4Konda1,097 km
5. 5Om1,091 km
6. 6Tara (Irtysh)806 km
7. 7Vagay555 km
8. 8Osha530 km
9. 9Tuy507 km
10. 10Uy (Irtysh)387 km
11. 11Shish378 km
12. 12Noska374 km
13. 13Bukhtarma336 km
14. 14Chagan295 km
15. 15Kürshim280 km
16. 16Uba278 km
17. 17Turtas241 km
18. 18Shar230 km
19. 19Burqin He206 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. Tributaries: the rivers that flow straight into the Irtysh, as Wikidata records where each river flows (P403) or which rivers flow into it (P974). A named stretch of the Irtysh (the Solimões of the Amazon) counts as the Irtysh; a river that reaches it through a lake or through a river too short for this pool is in its basin, not one of its tributaries. Their own tributaries are left out.

On the map

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