GeotchaA geography quiz on a real globe
25 longest tributaries of the Danube
25 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
- 1Tisza966 km
- 2Prut953 km
- 3Sava945 km
- 4Siret740 km
- 5Drava720 km
- 6Olt615 km
- 7Inn517 km
- 8Váh433 km
- 9Ialomița414 km
- 10Morava388 km
- 11Iskar368 km
- 12Timiș359 km
- 13Argeș350 km
- 14Jiu331 km
- 15Hron298 km
- 16Isar292 km
- 17Yantra286 km
- 18Enns254 km
- 19Rába250 km
- 20Lech248 km
- 21Ipoly233 km
- 22Altmühl227 km
- 23Vedea224 km
- 24Great Morava185 km
- 25Regen169 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 Danube, as Wikidata records where each river flows (P403) or which rivers flow into it (P974). A named stretch of the Danube (the Solimões of the Amazon) counts as the Danube; 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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