And the answers are...

1. The advertising award the Clio is named after which Muse in Greek mythology? - History

2. What waterfall is on the Zambezi River? - Victoria

3. In what year was Labor Day instituted? 1884, 1894, 1904, 1914 - 1884

4. What is the only state in the Union that is growing in physical area? - Louisiana

5. What is the largest city (in terms of population) on the Mississippi River? - Memphis

6. What are the two ingredients in a Rusty Nail cocktail? - Scotch and Drambuie

7. Who wrote "The Leatherstocking Tales"? - James Fenimore Cooper

8. What was Bermuda called before it was called Bermuda? - Somers Island

9. What baseball team was the first to put identifying numbers on the backs of their uniforms? - New York Yankees

10. How many states joined the United States in the 20th century? Can you name them? - 5 - Oklahoma, New Mexico, Arizona, Alaska, Hawaii