... in 1557, but fairly large quantities were not discovered until around 1750, when the Spaniards discovered it in Peru. They named the metal platinum, deriving from their word plata, meaning silver. The ore, called native platinum, usually occurs in beds of gold-bearing sand. Miners call it white gold. Native platinum contains from 60 to 85 percent pure platinum. The small, irregular grains that contain the ore also contain other rare metals, such as iridium, osmium, palladium, rhodium, and ruthenium. The grains also contain small amounts of iron, copper, chromium, and titanium. A large nugget of platinum wi ...

... molecules are very stable and have many uses in industrial and domestic applications, such as in spray cans, industrial solvents, degreasing compounds, and cooling in fridges. However when released into the stratosphere, such molecules can be broken down by energetic light rays (UV-C radiation) in a reaction that liberates an atom of chlorine, which destroys ozone by oxidising with the Ozone molecules, forming Cl-O and Oxygen. One atom of chlorine can destroy 10,000 ozone molecules! Atoms containing bromine, nitrous oxide, and hydrogen oxide radicals are also primarily dangerous. As a result, the Ozone in the st ...

... from the theft of their credit card numbers and personal details by hackers and the inability of consumers to feel and examine the products. These advantages and disadvantages will probably result in several major changes in the way business is conducted in the future. offers many advantages to both consumers and firms. It is very convenient for consumers as there are no shop hours and orders can be placed any time of the day. also allows companies to have much larger markets, once you are on the Internet you are everywhere. A customer in Japan can buy exactly what a customer in the UK buys from the same elect ...

... are good for recycling because they feed on dying material and convert it back into basic substances.Without decomposition the food chain would cease.Bacteria also helps in the breakdown on rocks which influences the movement of key elements,such as,sulfur,iron,phosphorus,and carbon,around the world.Bacteria are the main digesters of cellulose within cows and other animals.Bacteria are used in the making of dairy products.Without bacteria the dairy industry would not exist.Bacteria are also helpful in sewage treatment.These certain bacterias convert the organic materials of sewage into carbon dioxide,methane ...

... of streamlining occur, was the type region for the development of the new theory [Shaw et al., 1984]. The sheet flood flows proposed for this area by Shaw et al were about 150 km wide, and the total volume of the meltwater reservoir was estimated as about 84,000 km3. The subglacial flood hypothesis for drumlin origin has been applied to drumlins in New York, southern Ontario, the northeast shore of Georgian Bay in Ontario, and to the interpretation of hummocky terrain in southern Alberta, and other areas, by various workers. Shaw suggested as many as 10 meltwater discharges, similar to those which caused the Livings ...

... is as an aged pony that is tired. They have a varied diet. They hunt by night. Today's Armadillos are not the biggest armadillos that have ever existed. The soil of South America is full of larger Armadillo bones from the past. Some of the past bones were as much as sixteen feet long including the tail. Some even migrated to Texas. There are several species of these animals. The Six-banded Armadillos were good burrowers and massive devourers of insects. They also ate vegetable matter and were useful for devouring carrion. One specie called the Peludo was clumsy bet was effective in g ...

... the function of past tools. A small obsidian flake would be used in this experiment. It was approximately forty-eight millimeters long, thirty-four millimeters wide, and seven millimeters thick. From the ventral view, the left side was serrated. This seemed like the most appropriate side to use as a saw. A small round twig, a centimeter thick, from a local deciduous tree was used as the wood subject. The exact species of the tree is unknown; however, it was a very hard wood and a light brown/tan color. Initially, medium pressure was used on the flake and it was moved in bi-directional strokes ac ...

... He was the first to measure the specific gravity of aluminum and show it'd lightness. In 1854, Henri Sainte-Claire Deville obtained the metal by reducing aluminum chloride, with sodium. Deville displayed pure aluminum at the Paris exposition of 1855. Aluminum the most abundant metallic constituent in the crust of the Earth. It is never found as a non-metal. It occurs most commonly as aluminum silicate or as a silicate of aluminum mixed with other metals such as sodium, potassium, iron, calcium, and magnesium. Charles M. Hall and Paul L. T. Heroult, independently and almost simultaneously found out that alumna ...

... though iron is tough and hard it is still easy to work. Iron is a active metal and will combine with halogens, carbon, etc. It has an atomic weight 55.847, it's atomic number is 26, it's specific gravity is 7.86, it's melting point is 1535 degrees Celsius, and it's boiling point is 3000 degrees Celsius. It burns in oxygen forming ferrous oxide. When exposed to moist air, iron becomes corroded, forming a reddish - brown, flaky, hydrated ferric oxide, commonly known as rust. (Encarta, 1996) Iron is formed in shallow seas. It comes out of the water and collects on the sea floor. This creates an underwater dep ...

... Arizona, large cities use groundwater for their entire water supply. Although groundwater is an excellent water source, there are many complications. For example, it is a resource that is difficult to assess since it is not directly visible. Therefor with out complicated measurements, it is hard to say how much water there is left in your well. It is also difficult to tell where exactly the source of recharge for your well is. Thus if an area near your well becomes polluted, the pollution may seep into the groundwater feeding your well. The purpose of this project is to explore the subject of groundwater, its ...