26. The Rocky Mountains were explored by fur traders during the early 1800’s in a decades preceding the United States Civil War.



27. The works of the authorHerman Melville are literary creations of a high order, blending fact, fiction, adventure, and subtle symbolic.




28. Each chemicalelement is characterized to the number of protons that an atom of that element contains, called its atomic number.




29. The body structurethat developed in birds over millions of years is well designed for flight, being both lightly in weight and remarkably strong.




30. From1905 to 1920, American novelist Edith Wharton was at the height of her writing career, publishing of her three most famous novels.



31. In the early twentieth century, there was considerable interestingamong sociologists in the fact that in the United States the family was losing its traditional roles.



32. Althoughpure diamond is colorless and transparent, when contaminated with other material it may appear in various color, ranging from pastels to opaque black.



33. Comparative anatomy is concernedto the structural differences among animal forms.



34. A seismograph records oscillation of the ground caused byseismic waves, vibrations that travel from its point of origin through the Earth or along its surface.



35. Electric lamps came into widespread use during the early 1900’s and have replacedother type of fat, gas, or oil lamps for almost every purpose.



36. Located in Canada, the Columbia Icefield covers areaof 120 square miles and is 3,300 feet thick in some places.



37. Composer Richard Rodgers and lyricist Oscar Hammerstein II brought tothe musical Oklahoma extensive musical and theatrical backgrounds as well as familiar with the traditional forms of Operetta and musical comedy.



38. Because of itsvast tracts of virtually uninhabited northern forest, Canada has one of the lowest population density in the world.



39. Rice, which it stillforms the staple diet of much of the world’s population, grows best in hot, wet lands.



40. Government money appropriated for artin the 1930’s made possible hundreds of murals and statues still admiration in small towns all over the United States.