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» Science Essays and Papers
The Creation Of The Universe
<view this essay>.... of mankind rather than blindly accepting faith-filled beliefs we
may received from our parents as children. Perhaps it is because we live
in a nation filled with many peoples of different beliefs whose Gods are
all so varied and different that it is difficult to fathom that they are
all the same divine being. It is also plausible that we just have a desire
to quench the thirst for knowledge that lies deep within ourselves. As for
myself, I cannot believe in a being which created a universe and a
multitude of worlds in a rather short period of time then deigns to lower
itself into becoming a puppet-master and "pulling the strings" of the Earth
and all .....
Number of words: 1817 | Number of pages: 7 |
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Alchemy
<view this essay>.... `powder', which was regarded as the active principle in the
transmutation of metals. To this name the Arabs affixed the article `al',
thus giving al-khemeia, or alchemy.
HISTORY OF ALCHEMY: From an early period the Egyptians possessed the
reputation of being skillful workers in metals and, according to Greek
writers, they were conversant with their transmutation, employing
quicksilver in the process of separating gold and silver from the native
matrix. The resulting oxide was supposed to possess marvelous powers, and
it was thought that there resided within in the individualities of the
various metals, that in it their various substances were incorporated .....
Number of words: 3747 | Number of pages: 14 |
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Fungi: The Great Decomposers
<view this essay>.... nutrients of plants
and animals.
History
the history of fungi is not very clear because scientists have never
realy wnt in great deepth , because fungi are not needed commericaly. the
ancestors of fungi lived in shallow bodies of water about 600-800 million years
ago. Some of the things the fungi had to encounter from living out of water was,
there was more sunlight that was normally blocked be the water, and the had to
do something about the rapid shifts in tempature and seasonal shifts.
Fungi are different from other plants in many ways. The general
characteristics of fungi are extracellalar digestion, peculiar structures,
growth patterns, thei .....
Number of words: 180 | Number of pages: 1 |
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Water And Its Importance
<view this essay>.... special characteristics. Waters cohesion and adhesion properties allow it to be transported in plants, and its surface tension provides a comfortable habitat for many insects. Water is also one of the best solvents. The specific heat property of water stabilizes temperature in living organisms and its high heat of vaporization regulates earth's climate. One of the most unique things about water is the fact that it expands when it freezes unlike many other liquids. Its thermal and transparent properties protect aquatic life in freezing temperatures. All of these things combined help to sustain life and keep it constantly evolving. In the next couple of pag .....
Number of words: 1880 | Number of pages: 7 |
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Cadmium And Sewage Sludge
<view this essay>.... oxide is often found as part of small particles present in air.
Most cadmium is obtained as a by-product from the smelting of zinc, lead or copper ores. Cadmium has a number of industrial applications, but it is used mostly in metal plating, pigments, batteries, and plastics.
Cadmium in the Environment
Small quantities of cadmium occur naturally in air, water, soil and food. For most people, food is the primary source of cadmium exposure, since food materials tend to take up and retain cadmium. For example, plants take up cadmium from soil; fish take up cadmium from water, and so on.
It is introduced into the environment from mining and smelting operations .....
Number of words: 1239 | Number of pages: 5 |
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Human Cloning -
<view this essay>.... groups who are gaining ground as to the future of this awesome power. In truth, cloning could very well be the best, or worst thing ever to happen to mankind.
The possibilities of human cloning are vast indeed, but research in the area has been dramatically restricted in the United States and in some other countries. Pro-life groups that oppose free access to abortion have considerable political power, and were able to have all human embryo research banned by the Reagan and Bush administrations in most of the 1980’s and the 1990’s (religoustolerance). Although the ban was lifted during the first days of Bill Clinton’s presidency, i .....
Number of words: 1292 | Number of pages: 5 |
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Effects Of Deforestation
<view this essay>.... to declining wildlife
populations, drastic changes in climate and loss of soil.
The loss of forests means the loss of habitats for many species. Current
statistics show that as many as 100 species become extinct every day with a
large portion being attributed to deforestation (Delfgaauw, 1996). "Edge
effects" are the destruction or degradation of natural habitat that occur on the
fringes of fragmented forests. The effects for the animals include greater
exposure to the elements (wind, rain etc…), other non-forest animals and humans
(Dunbar, 1993). This unnatural extinction of species endangers the world's food
supply, threatens many human resources and has p .....
Number of words: 774 | Number of pages: 3 |
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Pesticides
<view this essay>.... to kill rodents such as rats and mice. These rodents can carry bacteria that cause diseases like rabies and typhus, and can also contaminate food supplies. Insecticides are used by farmers who want to exterminate some of the many harmful insects that can carry disease. Insecticides are very widely used, not only on farms, but in residential areas in the form of products like Raid, and ant traps.
are dangerous to our environment, but in most cases they help more than they hurt. For example, it is estimated that the food supply would reduce by forty to fifty percent without the use of on our crops. The FDA, EPA, and the Department of Agriculture try to en .....
Number of words: 554 | Number of pages: 3 |
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