1. All eels spawn in the sea, the eggs hatching into transparent, ribbon-like larvae _____, feeding until they metamorphose into small eels.

2. Springwater is _____ clean, since it has been filtered through permeable rocks, but all spring water contains some dissolved minerals.

3. In addition to painting highly acclaimed portraits, Mary Cassatt was _____ to several major art collectors.

4. _____ in the desert is mainly due to the limited supply of desert water.

5. The first glass factory _____ the North American continent was started in Jamestown, Virginia, in 1607.

6. The modem automobile is a _____ composed of more than 14,000 parts.

7. Many meteorites are thought to have originated from _____ that once existed between the orbits of Mars and Jupiter.

8. During the 1850’, reform movements _____ temperance and the abolition of slavery gained strength in the United States.

9. __, such as jazz, are often played from memory rather than from a written score.

10. Ohio. the center of _____ the Hopewen culture, has the greatest concentration of ancient burial mounds in the United States.

11. Prior to the eighteenth century,_____ storms formed and died out at the same location.

12. Some bird species have a song that is totally uninfluenced _____ environment during their development, whereas other species learn from other birds while young.

13. Formerly called natural philosophy, physics has retained _____ of understanding the structure of the natural world and explaining natural phenomena

14. Heat transfer takes place when _____ with a warmer substance.

15. The socialization process explains _____ of societies through successive generations but also the ability of a society’s members to have meaningful interactions.