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Science & Nature Essays and Term Papers
Animal ExperimentationIntroduction
has been a part of biomedical and behavioral research for
several millennia; experiments with animals were conducted in Greece over 2,000
years ago. Many advances in medicine and in the understanding of how organisms
function have been the direct result of animal ...
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Acid Rainis caused by pollution containing sulfur dioxide, nitrogen oxide, and ozone ( SOý, NOx, and Oý ) is released into the air.
These chemicals are absorbed into clouds and results in Acid Presipitation ( , Acid Snow, Acid Hail, Acid Sleet ).
When the chemicals aren’t absorbed into clouds, they can ...
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Extinction Of DinosCould an exploding star have been responsible for the death of the dinosaurs? This
idea has become popular again as an explanation for the disappearance of the
dinosaurs. An exploding star can blast material enormous distances into space. If
this material reached Earth’s atmosphere, changes ...
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Achondroplasiais known as being undersized, or less than 50in. in height. Having short limbs, a normal sized trunk, large head with a depressed nasal bridge and small face. This is a result of a disease in the thyroid gland. It can also be caused by Down syndrome or absorption, a cartilaginous tissue during ...
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AdamantaneThe unique nature of diamond is heavily dependent upon its composition, crystal structure, and mechanical, thermal, and electromagnetic properties.1 Of those dependencies, composition exacts the most influence over the characteristics. Crystal structure is the repeating pattern of diamond’s ...
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Le Virus Ebola (spanish Essay)Le virus d'Ebola, est un virus terrible. Ebola est un virus qui tuer les hommes dans un forme terrible. Il y a beaucoup des question quand nous parlons de la virus Ebola. Les question sont, comment est ce-que le virus nous tueons?, que ce-que c'est les symptomes?, comment est ce-que les gens le ...
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Oxygenand its compounds play a key role in many of the important processes of
life and industry. in the biosphere is essential in the processes of
respiration and metabolism, the means by which animals derive the energy needed
to sustain life. Furthermore, is the most abundant element at the ...
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Preserve The ForestsIn agreement with Kim Stafford, who opposes the clear-cutting of old
growth forests, I feel that it is necessary to preserve the profitable lumber in
its natural state for future generations. Currently, the tons of lumber
produced from the Pacific Northwest region of the United States are taken ...
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Effect On PotE Health Effects of Marijuana on Humans Tim Murphy Introduction Marijuana has been used as a drug since the beginning of time, yet
there are still many mysteries about its health effects on humans. Marijuana, or cannabis sativa, is a preparation of the crushed flowers
and buds of female hemp ...
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Time To ChangeThe earth and many of its contents, thanks in large part to humans, is
deteriorating and it has been for quite a time now. It is overwhelmingly
populated with both ignorant and lazy people. In effect, not much is being done
to prevent this deterioration. For instance, we are killing off vital ...
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Depression 7Depression is a psychiatric disorder characterized by feelings of worthlessness, guilt, sadness, helplessness, and hopelessness. It is different then normal sadness or grief from the loss of a loved one because it is persistent and severe. Clinical depression has many related symptoms trouble ...
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Hemophilia 4Hemophilia is the best known of hemorrhagic disorders. When a person has hemophilia, the blood does not clot properly and bleeding persists. The people who have hemophilia are called hemophiliacs or bleeders. Bleeding disorders, such as hemophilia, result from a disruption of the body's ...
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Black HolesWithin our galaxy alone, there are millions upon millions of stars. Within our universe, there are millions upon millions of galaxies. Humans have known the existance of stars since they have had eyes. Although interpretations may have differed on what they were, they were always thought of as ...
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Birth Controlpills are an oral contraceptive for women. They are monophasic, biphasic, or triphasic. Each type contains estrogen and progestin in differing amounts. Monophasic birth
control pills maintain the same levels of estrogen and progestin throughout the course, while biphasic pills keep the estrogen ...
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FishesThere are two classes of fishlike creatures in the Chordate Phylum. The first is Chondrichthyes Class, which comprises mainly of Sharks and Rays. The seconds is the common Bony of the class Ostechithyes. The apparent similarities between each speech are only skin deep. They have similar dapperly ...
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Could The Greenhouse Effect Cause More Damage??
John Harte is an ecologist from the University of California at
Berkley. He is trying to find out whether heat stimulates further trace-gas
from solid or not. He is going to conduct an experiment that will tell him if
the greenhouse effect could start a cycle that would cause the effects to ...
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AtomsHow many times can one cut a piece of gold in half? A Greek
philosopher named Democritus was the first in a long line of scientists and
mathematicians to try to answer this very difficult question. Around 450
BC, Democritus stated that all mater was composed of particles that he
called atomos ...
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StarsA star is a large ball of hot gas, thousands to millions of kilometers
in diameter, emitting large amounts of radiant energy from nuclear
reactions in its interior. differ fundamentally from planets in that
they are self-luminous, whereas planets shine by reflected sunlight. Except
for the SUN, ...
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Soil SalinitySalinity in both the rivers and on the land is one of the main and most costly
results of overclearing and irrigation. Salinity is caused by changes in the
delicate balance between surface water and groundwater systems. A small increase
in the infiltration of water from the topsoil to the ...
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AcetaminophenIn the late 1800’s it was discovered that papa-amino-phenol, could reduce fever, but the drug was too toxic to use. A less toxic extract called phenacetin was later found to be just as effective but also had pain-relieving properties. In 1949, it was learned that phenacetin was metabolized into ...
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Freezing Point, temperature at which a liquid congeals into the solid state
at a given pressure (see PRESSURE; TEMPERATURE).
The of a pure (unmixed) liquid is essentially the same as
the melting point of the same substance in its solid form and may be
regarded as the temperature at which the solid and liquid ...
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FungusThe Latin word for mushroom is (plural, fungi). The word has come to stand for a whole group of simple plants that contain no chlorophyll and lack such complex plant structures as roots, stems, leaves, and flowers. Included among the fungi, along with mushrooms, are molds, mildews, rusts, smuts, ...
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The Element: ChlorineGeneral Information
We researched the chemical element known as chlorine. Chlorine has
an atomic number of 17 and an atomic weight of 35.453. It has a
valence number of 3. The element has 3 energy levels. Chlorine exists
as a greenish-yellow gas at normal temperatures and pressures. Chlorine
is ...
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DepressionIn today’s society, we are faced with or placed in many unpredictable and stressful situations. However, many of us manage to properly analyze the situations and maintain our sanity, experiencing only a mild form of , if any. Others may encounter similar situations and become mentally depressed. ...
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Tiger SubspeciesI am here writing a report on the sub species of tigers. Many of these
tigers will not survive in the next forty years due to the killing that us
humans have caused. Tiger sub species have not been as important to us humans
as whether or not the species Tiger Panthera tigris can survive either ...
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