16. Soybeans contain a rich concentrations of phytoestrogens, Estrogen like molecules derived from plants.

17. The original Welland Canal, opened which in 1829, was neither deep enough nor wide enough for modern ships.

18. A lubricant minimizes the introduction of dirt, moisture, or other foreign materials between sliding surfaces, eliminates wear by keeping the surfaces apart and prevention corrosion.

19. There are thousands kinds of inks used both in the printing and in the manufacture of ballpoint and fountain pens for writing.

20. A gene is a biological unit of information who directs the activity                                          

of a cell or organism during its lifetime.

21. Like landscapes in miniature, gardens are places to grow plants for pleasure and to provide beauty and relaxed.

22. Hurricanes consist at high-velocity winds blowing circularly around a low-pressure center known as the eye of the storm.

23. One of the most significance political movements since the Second World War ended has been the breaking up of former colonial empires into independent nations.

24. Radar can determine the direction, distance, height, and speed of objects that are too much far away for the human eye to see.

25. Establishing outside Minneapolis, Minnesota, in 1976, the Minnesota Valley National Wildlife Refuge contains more than 9,000 acres of forests, prairies, marshes, and lakes.

26. Most animals have salivary glands what resemble those in humans.

27. Used for making pottery, clay has two characteristics distinctive: it can be molded and it can be baked to form a brittle but otherwise durable material.

28. The novels of Amy Tan depict of tension between mothers and  daughters as well as conflicts experienced by many Chinese immigrants to the United States.

29. The symptoms of pneumonia, a lung infection, include high fever, chest pain, breathing difficult, and coughing.

30. A basic premise of humanism is that people are rational beings who possesses the capacity for truth and goodness.

31. The long of time a battery maintains its useful life while idle depends on many factors: quality of construction, cell size, cell type, and storage temperature.

32. Leather is dried under natural or controlled humidity conditions, prepared it for subsequent softening and finishing operations.

33. Of all the organized, independent city in Texas, Laredo, founded in 1755, is the oldest.

34. There was in Kitty Hawk, North Carolina, on December 17, 1903, that the first controlled flight of a powered, heavier-than-air craft took place. 

35. The favored habitat of the junco, a small sparrow, is a mixed or coniferous forest, despite it is often noted in fields, thickets, and city parks.

36. By studying modern coral reefs, geologists and biologists hope to understand mechanism of formation, migration, and entrapment of petroleum in ancient reefs.

37. Searching for alternate forms of energy does not necessary mean the abandonment of fossil fuels as an energy source.

38. United States civil rights activist Medgar Evers was a leader in the struggle to gain equal rights to African Americans in his home  state, Mississippi.

39. The element potassium makes up less than one half percentage of the human body.

40. The canoe designed by North American Indians was very suitable for use on inland waters, for it was easily portable and had amply storage space.