questionedithistorytranslationsWhich river flows into the North Sea?Oder377Danube931Rhine4478Yukon River961Rhine empties to the North Sea in the Netherlands, where it forms a large delta together with Meuse and Scheldt.Share and bring new players to the game!correct this questionglobalquiz.orgreach: rather globalEuropegeographyNorth SeariversseasIllustration: d_marino2001Rivers quizSeas quizEurope quizGeography quizWhich landlocked country has the largest navy?Bolivia. Although Bolivia has been landlocked since the War of the Pacific in 1879, it still maintains its navy, which patrols Lake Titicaca and Bolivia's larger rivers. The Navy serves as a symbol that the country has not given up on regaining its lost access to the sea. As of 2008, the Bolivian Naval Force had approximately 5,000 personnel.What sound can be heard when approaching an iceberg?A fizz. When a piece of iceberg ice melts, it makes a fizzing sound called "Bergie Seltzer". This sound is made when the water-ice interface reaches compressed air bubbles trapped in the ice. As this happens, each bubble bursts, making a 'popping' sound. The bubbles contain air trapped in snow layers very early in the history of the ice, that eventually got buried to a given depth (up to several kilometers) and pressurized as it transformed into firn then to glacial ice.Which sea animal captures have grown significally since 1970?American lobster. In 1990s several cod stocks collapsed due to overfishing. With the large predatory fish removed, their prey have had population explosions, and the capture of lobster tripled since 1970.Which river flows into Lake Ontario?Niagara River flows from Lake Erie to Lake Ontario.