What are the branches of the Smithsonian?

Which river runs from the north sea to Switzerland? Largest island located on a mid-ocean ridge? Reasons for growth in tourism? You are a ridge or a continuous line of high land from which water flows from one side to the other? How are ocean and lake and estuaries alike? What bogs are easiest to exploit raised bogs or blanket bogs? What is the term that describes a raised island in the Everglades? What ocean would you have to cross if you wanted to travel from Europe to Jamaica? What is togo's longest river? Why would a civilization choose to live near a ever that regularly floods? How big is Yosemite? What can the people who live near coral reefs do to help? Why Is joe Louis buried at Arlington cemetery? In what country does the White Nile River begin? What is the deepest lake in British Isles? Does the great wall of china go through shainhia? Which great lake doesn't boarder Canada? What do Abraham Lincoln's hands stand for at the Lincoln Memorial? How many Natural lakes in Colorado? Is Niagara Falls natural?