1. Even at low levels, _____.

2. Algebra generalizes certain basic laws _____the addition, subtraction, multiplication, and division of all numbers

3. Geysers are found near rivers and lakes, where water drains through the soil _____.

4. Quails typically have short rounded wings that enable _____ spring into full flight instatly when disturbed in their hiding places.

5. The quantum theory states _____, such as light, is given off and absorbed in tiny definite units called quanta or photons.

6. _____, in the late 1800’s, some libraries had to keep as many as twenty to thirty copies of each of Mary Jane Holmes’s books on hand.

7. Thanks to modern irrigation, crops now grow abundantly in areas where once _____ cacti and sagebrush could live.

8. The University of Georgia, _____ in 1785, was the first state supported university in the United States.

9. Experiments in the photography of moving objects _____ in both the United States and Europe well before 1900.

10. The worldwide race to develop an affordable synthetic fuel has so far consumed billions of dollars and _____ few results.

11. _____ Colonial period the great majority of Connecticut’s settlers came from England.

12. Oliver Ellsworth, _____ of the United States Supreme Court, was the author of the bill that established the federal court system.

13. Muskrats generally _____ close to the edge of a bog, where their favorite plant foods grow plentifully.

14. After the First World War, the author Anais Nin became interested in the art movement known as Surrealism and in psychoanalysis, both _____ her novels and shorts stories.

15. According to the third law of thermodynamics, _____ possible is –273.16 degrees centigrade.