1. The determination of the path of Mars’s orbit in1609 became the unifying link among the two formerly separate realms of physics and astronomy.

2. Since flounders have markings that blend with their surroundings, it can lie camouflaged on the bottom of the ocean.

3. Some cities have a fire regulations that requires people to put smoke detectors in their houses.

4. The early use of a complete steel frame for towering buildings appeared in the first skyscraper, built on Chicago in 1883.

5. Its tremendous output of dairy products have earned the state of Wisconsin the title of America’s Dairyland.

6. Those electrons most closely to the nucleus are held there by electromagnetic force.

7. Best known for his research in statistical mechanics and meson physics, Chen Ning Yang shared the Nobel Prize in 1957 to another physicist from the United States, Tsung-dao Lee.

8. Susan Sontag’s aversion to the traditional critical practice of extracting morals meaning from art is reflected in her novels .

9. When a magnet is free suspended it becomes a compass.

10. The “ashcan” school in American art being a rebellion against traditional subjects and favored the painting of back-street scenes .

11. A statue, a monumental , a building, or a park may be dedicated to commemorate a distinguished individual.

12. The wild carrot, knew as Queen Anne’s lace, gave rise to the cultivated carrot in its domesticated form .

13. In 1981 the fossil jaw of a previously unknown small mammal was found onto a Navaho reservation in Arizona.

14. A patent gives inventors exclusive rights to their inventions for a fix period of time .

15. Alike most fruit trees, the quince is normally propagated from shoots or cuttings.

16. In mathematical terms , modern algebra is set of objects with rules for connecting or relating those objects.

17. Watercolors dry more faster than other paints.

18. A footnote is characteristically employed to give information that is too long or too detailed be included in the body of a text.

19. It has not been determined how years sea turtles can live in their natural environment, but they will reach a very old age if left undisturbed by humans.

20. Due to its excellent tensile strength, acetate rayon is an important material for products so as balloons, parachutes, fire hoses, and webbing.

21. Harvesting of grains is affected by annual changes in temperature or in the amount of moisture, but both.

22. Window treatment, furniture arrangement and color combine all contribute to the overall impression of a room .

23. A great proportion of the seeds of desert flora they possess germination-inhibiting substances .

24. Hurricanes are severe cyclones with winds over seventy-five miles an hour who originate over tropical ocean waters.

25. The methods of spectrum analysis vary according to the wavelength region were studied .