2. Magellan lost the favor of the king of Portugal when he became involved in a political .

3. The Pope divided New World lands between Spain and Portugal according to their location on one side or the other of an imaginary geographical line 50 degrees west of Greenwich that extends in a direction.

4. One of Magellan's ships explored the of South America for a passage across the continent.

5. Four of the ships sought a passage along a southern .

6.The passage was found near 50 degrees S of .

7. In the spring of 1521, the ships crossed the now called the International Date Line.

8.The Curies' collaboration helped to unlock the secrets of the atom.

9.Marie had a bright mind and a______ personality.

10. When she learned that she could not attend the university in Warsaw, she felt .

11.Marie by leaving Poland and traveling to France to enter the Sorbonne.

12. she remembered their joy together.

13.Her began to fade when she returned to the Sorbonne to succeed her husband.

14. Even though she became fatally ill from working with radium, Marie Curie was never .

15.Herculaneum and its harbor were buried under _lava.

16. The poisonous gases were not in the air.

17.Scientists analyzed data about Vesuvius in the same way that a zoologist a specimen.

18. have concluded that the volcanic eruption caused a tidal wave.

19. Scientist have used _ water to wash away volcanic ash from the skeletons of victims.