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... gems, as their crystal structure does not allow them to be cut and polished. Gems stones that are clear can be used in optics because of how they refract light. Laser machines often use crystals to break up their beams. Scientists have used crystals in the study of light. 10. Which gems are most famous? Diamonds are one of the best ... ...
... also suggests the trigometrical methods in mathematics. This trigonometric functions are considered as the best gift to mathematics by Ptolemy and these trigonometric function are acknowledge the world about the length of the chord in the circle. In trigometry he also applied various theorem, proof and calculation and he also used some of these theorems in order to solve the problem ... ...
... cause the sea levels to rise. The rising sea levels will contribute to mass flooding. According to www.ecobridge.com, North America's largest glacier has lost seven miles of its length. They predict that if global warming continues all the glaciers in Glacier National Park will be gone in 2030. The NRDC predicts that sea level will rise between 19 and ... ...
... correct. Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. He filled his notebooks with records of height, weight, color, claw size, tail length, and other characteristics among members of the same species. He also observed that high birthrates and a shortage of life's necessities forced organisms into a constant "struggle for existence", both against the ... ...
... the white of his half-open eyes showing. 'A mammoth! A mammoth!' someone shouted. (Chorlton 54) An elephant with a body covered with thick fur about thirteen feet in height and fifteen in length with tusks eight feet long that curved outward at the end. It had a trunk six feet long and colossal legs one and a half feet thick. The beast was fat and ... ...
... radiometric dating methods performed on appropriate rock types. Some of the most important discoveries of modern science and technology have been the discovery of the Earth's age and the vast length of time encompassed by its history. This scale, comprised of billions and trillions of years is called the geologic time. In the mid-17th century an Irish clergyman, Bishop James ... ...
... two annual equinoxes as well, occurring in spring and autumn. Equinoxes occur when the sun rises due east travels and sets due west, thus day and night are equal in length. Ancient farmers planted and harvested their crops according to the equinoxes, and modern farmers follow the same schedule. The vernal, or spring equinox takes place around March 21st and celebrates ... ...
... based on biological diversity: "One needs to have everything from the ancient creatures, such as the early anaerobic phototropic bacteria, to the vertebrates for these systems to run for any length of time" (The Bioneers, pg. 21). Despite all the bacteria and living items in John Todd's system, the water which comes out of it is sanitary and is cleaner than ... ...
