.... strips parallel to the Atlantic and to one another. The mountains were formed due to several collisions between the African, Eurasian and North American Plates. Africa and North America were joined into one super continent. The collision of these land masses over 1 billion years ago metamorphosed the original rock producing the Pedler gneiss and Old Rag granite which can be observed in the Shenandoah National Park. In late Precambrian time this super continent began to rift apart under the tensional forces producing the Catoctin rift basalts that can be observed in the Shenandoah. As they rifted apart, they created a growing ocean called the proto-Atlantic or .....

.... it just goes to landfills they get to overpacked and the landfills can’ t handle the whole load. According to the documents, in 1990, Americans generated 269 million tons of municipal waste which is an average of 1.089 tons per person. In 1997, this had increased to 340 million tons which is an average of 1.272 tons per person and this amount is getting higher and higher each year and we need to put a stop to this. Trash is not a problem far from us, it is right here in our community. People are throwing things on the floor all the time and recycling has not been done as much as it should be. In New York city we have one of the world’s most largest a .....

.... n3 p. 58-68 Sep. 1989) The Changing Atmosphere, Scientific American). The way in which acid rain is created from here is that About 70 percent of acid rain comes from sulphur dioxide (SO2), which dissolves into the water to form sulphuric acid. The rest comes from various oxides of nitrogen (mainly NO2 and NO3, collectively called NOx). These gases are produced almost entirely from burning fossil fuels, mainly in power satations and road transport. (Kucera, (1973) The Challenge of Ecology, The Mosby Company.) Tremendous quantities of this nitric acid and sulfuric acid mix are reflected in the lowering of the acidity of rain. Earthworms (Annelids) are a speci .....

.... has increased the need for security. The concerns about security of an organisation is not directly depend on the data communication related areas but also the control mechanism which implements, restricts and protects the threats from in and out side the organisation. This report proposes the need of security and ways in which the organisations secure their business information will be discussed. Facts and findings 2.1 What is Security? “ Security is the state of mind” [1] An example is mission impossible one of the detective movies who show how easy it is to tap a telephone- Although it is illegal unauthorised access is gained, da .....

.... by many distinct symptoms: changes in mental state 'mad-cow', abnormalities of posture, movement, and sensation (Hunter, 1993). The duration of the clinical disease varies with each case, but most commonly lasts for several weeks. BSE continues to progress and is usually considered fatal (Blowey, 1991). After extensive research, the pathology of BSE was finally determined. Microscopic lesions in the central nervous system that consist of a bilaterally symmetrical, non-inflammatory vacuolation of neuronal perikarya and grey-matter neuropil was the scientists' overall conclusion (Stadthalle, 1993). These lesions are consistent with the diseases of the m .....

.... and may benefit humans, the harms indeed outweigh the benefits. Animal experimentation was not common until the early nineteenth century and emerged as an important method of science. The first recorded action of vivisection was the study of body humors by Erasistratus in Alexandria during the third century (1:3). Later, in A.D. 129-200, the physician, Galen, used five pigs to investigate the effects of several nerves (1:4). He is considered to be the founder of experimental physiology. During the Renaissance Era, Andreas Vesalius conducted experiments on monkeys, swine, and goats (1:3). By the late eighteenth century, the methods of scientific discovery w .....

.... “Natural resources are limited.” Fourth, “Individuals of a population vary extensively in their characteristics; no two individuals are exactly alike.” And last, “Much of this variation is heritable.” This process of eliminating certain parts of a population is natural selection. Studies were being done during Darwin’s findings that indicated there was a “gene” associated with certain characteristics. Mendel’s pea plants proved there was a way of artificially creating trends in color of flowers. This discovery led to modern genetics. We now know chromosomes carry valuable information that determines characteristics in living species. When you put these .....

.... the stars burning? Have they always been glowing, or are they born like humans, and thus will they die? The answers to all these questions can be summed up in two words; stellar fusion. Therefore one can begin to understand the stars by understanding what fusion is, how it affects the life of a star, and what happens to a star when fusion can no longer occur. The first question one must ask is, "What is fusion?" One simple way of explaining it is taking two balls of clay and mashing them into one, creating a new, larger particle from the two. Now replace those balls of clay with sub-atomic particles, and when they meld, release an enormous amount of energy .....