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Search results 651 - 660 of 1576 matching essays
- 651: The Classification and Formation of Crystals
- ... is cooled rapidly, numerous seeds form and grow only into tiny crystals. Table salt, purified at a factory by recrystallization, is composed of lots of cubed crystals, which are barely visible with the naked eye; rock salt, formed in a really long time, contains enormous crystals of the same cubed form.
- 652: The Noble Gases
- ... abundant and most used noble on earth. It was discovered by Lord Rayleigh and by Sir Walter Ramsey in 1894. Argon makes up about 1.2 % of the earths atmosphere. It is found naturally in rock and in the air. It is used for electric light bulbs and floursent tubes. It is also used a lot in industry. Krypton a very rare noble was discovered by Sir Walter Ramsey and by ...
- 653: Iron
- ... The second method in which iron is mined is called shaft mining. Shaft mining is usually used for deep and concentrated iron deposits. The way shaft mining works is that a large machine crushes the rock and then conveyor belts are used to transport it up to the surface. The definition of refining is to make fine or pure; free from impurities; dross, alloys, sediment, etc. When they refine iron they ...
- 654: The African Penguin
- ... the islands on which the penguins breed. It became the basis for a new industry and workers removed thousands of pounds. This disturbed the birds and because the islands were scraped down to their bare rock the penguins could not dig their burrows into the Guano for their nests and so the penguins and their chicks be came more vulnerable to the Kelp Gull. They became more vulnerable bec ause they ...
- 655: Moon Expoloration
- ... and left scientific instruments, including a laser beam reflector, a sheet of aluminum foil to to trap SOLAR WIND particles, and a seismometer that later transmitted evidence of a moonquake. The astronauts took soil and rock samples and photographs. At 12:56 AM Eastern Daylight Time on July 22, 1969 the land craft called the LEM, or Lunar Excursion Module, left the surface and orbit of the moon. They landed in ...
- 656: Experiment to See if Soaking A Golf Ball Affects its Distance
- ... a dimples depth could boost a drive length by 15 yards. Hitting a shot 250 yards without dimples could only go about 125 yards. Shallow dimples allow the ball to fly higher but without much roll at the end. Deeper dimples create more turbulence and flatten the arc of the golf balls drive. Dimples disrupt the flow of air around the ball, thereby decreasing drag, or the airs resistance to the ...
- 657: UFO's
- ... when carefully examined were identified as electrical cells. One of the cells which was discovered in Iraq was tested and produced 2 volts of electricity. The other, which was discovered by a pair of Arizona rock hounds, was damaged when the sedimentary encrustation was being removed and therefore couldn't be tested (Montgomery 221). Since the dawn of time man has told stories of heavenly and demonic beings coming to rule ...
- 658: Star Mars
- ... SU team announced that a meteorite found on the Antartica contained evidence of past life on the red planet. They supported their conclusion on the basis of organic molecules, carbonates, and minerals found inside the rock, which are basic components of living things. This announcement astonished the world, but not the critics who skeptically stated opposite explanations for each of the components discovered. The main discussion focused by critics like Allan ...
- 659: Phosphorus: Chemical Reactions of Phosphorus and Its Importance
- ... nutrients for plantlife. When fall approaches, or when phosphate levels are decreased, the algae die and fall to the bottom, changing the bottom from a silt, sand and clay bottom to a sand gravel and rock bottom. When the plants die, they are degraded by aerobic bacteria, which can deplete dissolved oxygen, killing aquatic organisms. As oxygen levels drop, anaerobic bacteria resume the breakdown and produce noxious products. All of this ...
- 660: The Laser
- ... optics. Fiber optics are glass rods in which a laser is shot through the rod, making pulses which are then changed into sound. Entertainment: Lasers can also be used to entertain. They are used in rock concerts or alone as part of a show. Another form of entertainment that is made possible by the laser is the hologram. At first holograms could only be made with a lasers. Now we can ...
Search results 651 - 660 of 1576 matching essays
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