1. Like Jupiter, Saturn is a large, gaseous planet composed_________of hydrogen and helium.

2. Cells,first identified by the early microscopists, began to be considered_________in the nineteenth century.

3. _____ idely used in the chemical industry, sodium carbonate is principally consumed by the glass industry

4. Portland, _____, is located primarily on two hilly peninsulas overlooking Casco Bay and its many islands.

5. Wild eagles that survive to adulthood are believed _____ from 20 to 30 years.

6. Their keen senses of hearing and smell have made some types of dogs _____ in hunting and tracking and as security guards.

7. It is unlikely that a nation would choose war if its goals _____ peacefully.

8. In 1914 a bronze tablet _____ Harriet Tubman was placed at the entrance of the Cayuga Country Courthouse in Aubum, New York.

9. The Hawthrone studies, _____ the monotonous working conditions of factory personnel, were a major contribution to industrial psychology.

10. As Mercury moves in its solar orbit, _____ its axis, an imaginary line that runs through its center.

11. The ceremonial Chilcat blanket of the Northwest Tlingit Indians was generally _____ from cedar bark, wool, and goats’ hair.

12. Because kaolin shrinks in firing at a different rate than ordinary clay, _____ when creating pottery using both types of clay

13. When Columbus reached the New World, corn was the _____ in the Americas.

14. The world’s deepest cave, Pierre St. Martin in the Pyrenees Mountains, is almost three times as deep _____.

15. Charlie Parker, _____ was one of the creators of the music style called “bop.”