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» Browse Science and Environment Term Papers
Archaeology
Number of Words: 812 / Number of Pages: 3
... Some bones were found with spear points in the bodies, some whole skeletons were found closer to the bottom, and some bones were scattered all over. It can be inferred from the patterning of the bison bones that they were butchered differently.
Middle range theory also plays a part in the Olsen-Chubbuck site. From the visible remains of the bison, we can estimate from the skeletal remains of the bison that the total meat was 60,000 pounds and the total amount of people capable of butchering the bison would be 150, thereby relating the artifacts to past human behavior.
Archaeologists also study pa ...
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Depression..a Deadly Disease
Number of Words: 1858 / Number of Pages: 7
... (Pfizer, Dealing) Depression is a whole-body illness, including mind, mood, body, and thoughts. It effects everything from the way you sleep to the way you feel about yourself. It effects how you react and how you see things. Depressive illnesses often interfere with normal functioning and cause pain and suffering not only to those who have the disorder but also to the ones who care about them. Depression can rip apart families and destroy the life of an innocent person. This happens to many people because, unfortunately, they do not recognize that they have a treatable illness, and don't seek medic ...
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Scenes Of Nature
Number of Words: 260 / Number of Pages: 1
... The clouds can form many different and interesting shapes.
At night the sky becomes enchanting and glorious. When the stars are out
the sky is undeniably exquisite. The skys deep shades range from blue at
dawn to deep oranges and purple at dusk. The sky scenes are genuinely
picturesque.
The forest changes it scenery in seasons instead of day and night
like the sky. In the summer the forest is filled with majestic shades of
green. The fall brings colorful shades of oranges, reds, and yellows. The
winter deprives the forest of its colorful splendor, but brings a different
type ...
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Newton's Law Of Universal Gravitation
Number of Words: 1196 / Number of Pages: 5
... fell to Earth at about this rate. For the first basic
explanation of this we will assume a linear plane, one in which all forces act
in only one direction. Therefore when the apple fell it went straight towards
the center of the earth (accelerating at about 9.8 meters per second second).
Newton then figured that the same force that pulled the apple to Earth also
pulls the moon to the earth. But what force keeps the moon from flying into the
earth or the earth flying into the sun (Edwards 493)?
To better understand this, one other aspect must first be understood.
Galileo showed that all objects ...
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Depression 2
Number of Words: 1177 / Number of Pages: 5
... of the night with difficulty returning to sleep, waking up too early in the morning, brief periods of REM sleep, unusually long periods of stage 1 (light) sleep, or unusually brief periods of stage 3 and 4 ( deep, restorative) sleep (depression.com 1). Weight and depression are also commonly associated with each other. Many people begin loosing interest in eating which results in weight loss. Others may experience the opposite effect and gain weight by overeating. Various antidepressant medications are known to have different affects on appetite and weight (de ...
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Acid Rain And Its Origins
Number of Words: 1284 / Number of Pages: 5
... like to know something’s I can do to lessen the effects on our environment.
What is acid rain? Acid rain is the name commonly given to the deposition of a cocktail of acidifying compounds to soils, surface waters and buildings. These compounds arise mainly from the combustion of fossil fuels. In some parts of the United Kingdom, natural ecosystems have a significant acid-neutralizing capacity and acid rain has little impact on them. In other parts, the neutralizing capacity is limited, and terrestrial and aquatic ecosystems are sensitive to acid deposition. In acid-sensitive areas, acid rain degr ...
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Aids 3
Number of Words: 1460 / Number of Pages: 6
... blood and its components. And sadly, whenever a mother is infected, the unborn child will almost positively receive the virus before, during, or after the pregnancy.
The viruses which cause AIDS, otherwise known as Human Immunodeficiecy Viruses(HIV) were first discovered in 1983 cooperatively by Dr. Robert Gallo of the National Cancer Institute and Dr. Luc Montagnier of the Pasteur Institute in France. Aids is caused mainly by the HIV-1 virus, while the HIV-2 virus is less pronounced among those infected. Scientists are puzzled as to why this dominant HIV-1 virus has 10 different genetic subtyp ...
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Fetal Development
Number of Words: 2666 / Number of Pages: 10
... in the uterus and has to "land" somewhere and
attach itself to the endometrium. The eighth day is when
implantation occurs. The fertilized egg then implants
itself on the endometrium, the uterine lining, and begins to
grow. The cell begins to grow and develop. By the 12th
day the blastocyst has approximately two thousand cells in
it. It has had time to attach itself to the endometrium and
these anchors are called protuberances.
Embryonic Development
After about three weeks the tiny little heart is
developed enough to start beating and has the ability to
pump blood. ...
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Computer Viruses
Number of Words: 3907 / Number of Pages: 15
... user. Still, many specialists insist that it is possible to use the replication mechanism of for some useful and beneficial purposes. In this paper I will examine the question of why computer users consider to be a bad thing and why they reject the idea of having a computer virus serve a good purpose. I will also explore the military point of view with regard to . This paper is based in large part on a research paper by Vesselin Bontchev from the University of Hamburg.
The term “computer virus” is usually associated with some mean, little program that is produced to serve only one purpose; to ca ...
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Alternative Fuels (fuel Cells)
Number of Words: 1185 / Number of Pages: 5
... that produces electricity silently, without combustion. Hydrogen fuel, which is one of the most abundant chemicals in the universe, and oxygen from the air are electrochemically combined in the fuel cell to produce electricity. Heat and pure water vapour are the only by-products of the fuel cell.
The Ballard Fuel Cell is made up of two electrodes, the anode and the cathode, separated by a polymer membrane electrolyte. Both the anode and the cathode are coated in a thin layer of platinum catalyst. At the anode, hydrogen fuel is changed into free electrons and protons. The free electrons are sent i ...
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