1. It was the split of eleven southern states from the Union in 1861 that leading to the Civil War in the United States.

2. A cardinal role for players of the lute, a stringed instrument, are that every note is sustained for as long as possible

3. During the nineteenth century the molecular theory of matter was developed, which considered all matter to be composed of tiny, indivisible entity called molecules.

4. Under the certain conditions, a rainbow appears at the end of a rain shower in the quarter of the sky opposite the Sun.

5. A merger is achieved when a company purchased the property of other firms, thus absorbing them into one corporate structure that retain its original identity.

6. The soil in which coffee is grown must be rich, moisture , and absorbent enough to accept water readily, but sufficiently loose to allow rapid drainage.

7. Also known as a movie or a film, the motion picture is one of the most popular form of art and entertainment throughout the world.

8. In the early 1900’s Pennsylvania’s industries grew rapidly, a growth sometimes accompanied by disputes labor .

9. As do all insects, a butterfly has a hard outer covering, called it an exoskeleton, that both supports and protects the body.

10. Fossil remains reveal that the farther back in time an animal lived, the smaller than was its brain in proportion to the size of its skull.

11. Transistors exhibit a high amplification factor, operate without distorted over a wide frequency range, and can be made extremely small .

12. Independence political of newspapers became a common feature of journalism in the United States of the 1840’s and 1850’s.

13. First reported by Spanish explorers in 1796, the asphalt in California’s La Brea Tar Pit was mined commercial for many years.

14. Until the George Washington Bridge was built , modern suspension bridges were stiffened with steel trusses and beams to limited their motion in traffic and wind.

15. Georgia O’Keeffe is known for hers use of organic, abstract forms painted in clear, strong colors.

16. With little nor no mass and no electric charge, neutrinos can penetrate a solid object such as the Earth as if it were not there.

17. Many dinosaurs were so much heavy that they spent most of their lives in swamps and shallow lakes where water could support them.

18. A uniform mingling of molecules, which it occurs in homogeneous chemical compounds, results from the chemical constituents melting, dissolving, or diffusing into one another .

19. The right side of the brain is mostly concerned with pictorial, intuitive, musically and spatial ablilities.

20. With the discovery of gold in the Klondike in Canada’s Yukon Territory in 1896, people flocked soon there from all parts of the world.

21. The Guggenheim Museum in New York City is one of the major center for the collection and display of works of abstract art in the United State.

22. Early signs characteristic of the acute phase of viral hepatitis in adults are abdominal pain, nausea, and feverish often accompanied by chills.

23. The earliest successful sewing machines were powered by turn a hand crank .

24. The Dinee, a Native American people of the southwestern United States, were once seminomadic hunters who practiced a few agriculture.

25. By the end of the nineteenth century, organic chemistry had develop new methods for the synthesis of dyes, perfumes, explosives, and medicines.