GeotchaA geography quiz on a real globe

17 longest tributaries of the St. Lawrence

17 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. 1Ottawa1,271 km
2. 2Saint-Maurice river563 km
3. 3Rivière Péribonka547 km
4. 4Rivière aux Outardes450 km
5. 5Rivière Betsiamites444 km
6. 6Rivière Moisie410 km
7. 7St. Joseph338 km
8. 8Mississagi322 km
9. 9Manistee310 km
10. 10Magpie290 km
11. 11Rivière Sainte-Marguerite280 km
12. 12Genesee253 km
13. 13Raquette235 km
14. 14Oswegatchie225 km
15. 15Rivière Manicouagan200 km
16. 16Saint-François200 km
17. 17Niagara53 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 St. Lawrence, as Wikidata records where each river flows (P403) or which rivers flow into it (P974). A named stretch of the St. Lawrence (the Solimões of the Amazon) counts as the St. Lawrence; 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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