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social studies


a customs union comprising Belgium, the Netherlands, and Luxembourg


an economic system in which investment in and ownership of the means of production


the chief minister of state in certain parliamentary governments, as in Germany


a form of government in which the supreme power is vested in the people


an embankment for controlling or holding back the waters of the sea or a river


the height to which something is elevated or to which it rises


the official common currency of 12 European Union nations


a body of water along the shore deep enough for anchoring a ship

hydroelectric power

a form of energy generated by the conversion of free falling water to electricity


shut in completely


the principal land of a country

navigable river

a river that is deep and wide enough to provide passage to ships

Northern European Plain

the largest mountain free land form in Europe


an area of land reclaimed from the sea and protected by dikes especially in the Netherlands

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