ANSWERS

1. "Good King Wenceslas". Wenceslas was Duke of Bohemia.

2. Radium

3. The Battle of Trenton, after crossing the Delaware River. The German troops were the Hessians.

4. The Soviet Union (USSR)

5. Kwanzaa, created by Maulana Karenga

6. Jack Johnson

7. The King George VI Chase

8. Charles Babbage

9. Metallica (the drummer is Lars Ulrich). The bonus answer is tennis (Torben Ulrich).

10. "The Exorcist", based on the novel by William Peter Blatty