History of Russia

3. These Russian mountains create a natural border between Europe and Asia.
4. Modern Russians are descended from _______ who migrated from Poland and Ukraine into Western Russia in the 400s and 500s.
7. The capital of Russia.
8. Vladimir adopted the ______ Christianity.
10. A prison in Siberia.
11. A large area of land in Russia on the eastern side of the Ural mountains.
13. _______, which were peasants who are illegally bound to live and work on land owned by his or her lord.
14. This was the Russian political group that called for worker control.
15. Prince Ivan III started calling himself _____, or emperor.

1. The ocean to the north of Russia.
2. After WWI, Russia's monarchy collapsed and Parliament forced ________ to give up the throne.
3. In 1922, Russia united with the former Russian Empire to form the _______.
5. The longest river in Europe.
6. The Bolsheviks put in a new political and social system called __________.
9. The type of land in Siberia that stays frozen yearround.
12. This is the only sea in Russia that remains open year round for international trading.