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Search results 1021 - 1030 of 1576 matching essays
- 1021: Gold And Its Uses.
- ... and accurate measurement of the ore deposit. Construction begins following the lengthy process of receiving permits. As holes are drilled for blasting, samples of ore are examined to determine grade and metallurgical characteristics. The broken rock is marked by type for efficient processing. Based on its metallurgical makeup, a dispatcher directs truck operators to deliver the ore to the correct processing location. Low-grade ore is roughly broken into small chunks ...
- 1022: Fertilizers
- ... liquid form under pressure in steel tanks. Three solid nitrogen fertilizers are ammonium sulfate, ammonium nitrate, and ammonium phosphate. Two common phosphorus fertilizers are superphosphate and triple superphosphate. Phosphorous fertilizer is made by treating phosphate rock with sulfuric acid. Potassium sulfate and potassium nitrate are used on crops that are harmed by chlorides. The term straight fertilizer stands for any material that supplies one of the three principal macronutrients. The three ...
- 1023: Earthquakes 2
- Earthquakes can simply be defined as a naturally induced shaking of the ground caused by the fracture and sliding of rock within the earth's crust. There are at least 6,000 earthquakes detected throughout the world each year. Many people have heard about or experienced first hand the effects that an earthquake can have. But ...
- 1024: Everglade Dilemma
- ... heart of Florida lies a natural resource known as the everglades. This particular system is extremely complex and one that follows the action-reaction principle. Both the correct environmental features, as well as the right rock layers and substrates created the everglades. Geology and the environment created a system that has been nearly destroyed by man. Now he is trying to return the glades to life with a complicated set of ...
- 1025: Enviromental Science Profit Or
- ... produce undesirable odors. Among air pollutants emitted by natural sources, only the radioactive gas radon is recognized as a major health threat. A byproduct of the radioactive decay of uranium minerals in certain kinds of rock, radon seeps into the basements of homes built on these rocks. The most prevalent and widely dispersed air pollutants are described in the accompanying table. The level is usually given in terms of atmospheric concentrations ...
- 1026: The Year 2000 Bug
- ... is approaching there are a great deal more of these machines around then anyone ever would have thought. This poses a problem because when the last two digits of the year section of the date roll around to 00 the computer will think that the year is 1900 because it simply assumed that the first two digits are 19. At first glance this problem seems to be minor but at a ...
- 1027: Drinking Water Contamination
- ... be reported to public health authorities. Radiation Radon is an odorless and colorless radioactive gas that generally occurs in drinking water derived from groundwater as a result of the underground decay of naturally-occurring radioactive rock. It is considered to be a known human carcinogen by the National Academy of Sciences and others.[56] Drinking water contaminated with radon in excess of the EPA's proposed standard of 300 picocuries[*] per ...
- 1028: Diamonds
- ... layers inside the planet to crystallize into diamonds. The diamonds moved up to the earths surface through volcano eruptions. This is why many Diamond mines are near volcanoes. Diamonds occur in two types of rock: Kimberlite and Lamprolite. Diamonds are mostly found in South Africa, India, Brazil, Russia, Australia, and Arkansas. Right now about 100million carats are mined each year. Today the largest cut Diamond in the world is the ...
- 1029: Dinosaur History
- ... God describes one of the larger dinosaurs. It is said to be describing a Brachiosaurus. It is a giant plant eating animal with strong bones. There are tracks in Texas that are embedded in hard rock that show that dinosaurs and man walked at the same time. There is one human track and one dinosaur track seventeen inches apart. It is evidence that shows the thought that dinosaur and man never ...
- 1030: Dams And Resources
- ... the land, taking with it sediment and dissolved materials that drain to watercourses and, in most cases, eventually to the sea. So is the river a product of the land it inhabits--the type of rock and soil, the shape of the land, and the amount of vegetation are some of the factors that determine the river's shape, size and flow. When these ties between the land and the river ...
Search results 1021 - 1030 of 1576 matching essays
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