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» Science Essays and Papers
What Is Electricity
<view this essay>.... up batches
of "electrons," which are very small objects that carpet manufacturers
weave into carpet so that they will attract dirt. The electrons travel
through your bloodstream and collect in your finger, where they form a
spark that leaps to your friends filling, then travel down to his feet and
back into the carpet, thus completing the circuit.
AMAZING ELECTRONIC FACT:
If you scuffed your feet long enough without touching anything, you would
build up so many electrons that your finger would explode! But this is
nothing to worry about... unless you have carpeting. Although we modern
persons tend to take our electric lights, radios, mixers, etc. for
grant .....
Number of words: 726 | Number of pages: 3 |
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Leukemia
<view this essay>.... in gene structure could be caused by
environmental problems. Some of these problems could be:
birth defects, radiation, viruses, and chemicals. Leukemia
is not inherited and is not contagious.
There are two major types of Leukemia, Lymphocytic and
Granulocytic. In Lymphocytic Leukemia white blood cells
known as Lymphocytes, which are made in the Lymph glands
and bone marrow are abnormal or immature. In Granulocytic
Leukemia this causes an increase in white blood cells known
as granulocytes. Granulocytes are made in the bone marrow,
and other tissue. Granulocytes that are affected by
leukemia cannot fight of infections.
There are two ways .....
Number of words: 457 | Number of pages: 2 |
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Global Warming And The Greenhouse Effect
<view this essay>.... the earth would be -20 degrees Celsius, oceans would have frozen, and there would be no life on earth. The Washington Post has reported that the earth is warmer than it has been in 1,200 years.2 Recently, the summer of 1999 set records for heat in much of the United States. The average world temperature has increased one degree Fahrenheit over the last 120 years, making the world hotter than it has been in 100,000 years. From the beginning of the industrial revolution, concentrations of carbon dioxide have increased by 30%, concentrations of methane have doubled, and nitrous oxide has risen by 15%. The increases of these chemicals have enhanced the heat t .....
Number of words: 1903 | Number of pages: 7 |
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Coral Reefs 2
<view this essay>.... counting the thousands of different species of plants and animals that use or live in the coral reef. There are three types of coral reefs: fringing reefs, barrier reefs, and atolls. Fringing reefs are located close to shore, separated from land by only shallow water. Barrier reefs lie farther offshore, separated from land by lagoons more than ten meters deep. Atolls, on the other hand, are formed far offshore and they make a ring-shaped reef that close a circular lagoon. Coral reefs are the largest biological structures on the planet, with the largest being the Great Barrier Reef covering over 2000 kilometers along the East Coast of Australia. The reef .....
Number of words: 1446 | Number of pages: 6 |
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Oil And Protecting The Environment
<view this essay>.... of fabric dipped in the substance.
While seeps are natural, we have an obligation to protect nature from
accidental oil spills from our operations that can damage an ecosystem.
The petroleum industry is working closely with government agencies,
universities and research centers to reduce the frequency and impact of
oil spills. As a result of new operating procedures and research into
advanced technologies, the industry has made tremendous progress in
preventing spills over the past decade.
In 1997, the latest year that Coast Guard statistics are complete, the
volume of oil spilled in U.S. waters declined by two-thirds compared to
the year before, repres .....
Number of words: 357 | Number of pages: 2 |
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Mitochondria
<view this essay>.... into the
folds of the inner membrane called cristae which dramatically increase the
surface area of the inner membrane. Cristae extend into a dense material called
the matrix, an area which contains RNA, DNA, proteins, ribosomes and range of
solutes. This is similar to the contents of the chloroplast stroma and like the
chloroplast, the mitochondrion is a semi-autonomous organelles containing the
machinery for the production of some of its own proteins. The main function of
the mitochondrion is the oxidation of the pyruvate derived from glycolysis and
related processes to produce the ATP required to perform cellular work.(Campbell
182-9)
Pyruvate, or fatt .....
Number of words: 928 | Number of pages: 4 |
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Give An Overview Of Life Through The Tertiary, In Relation T
<view this essay>.... at the start of the Paleogene interval but in many ways resembled modern mammals by the period’s end.
The most profound geographic change during Paleogene time was a refrigeration of Earth’s polar regions, which resulted in a chilling of the deep sea and, later in the Cenozoic Era, in widespread glaciation. Paleogene mountain-building events in western North America foreshadowed Neogene uplifts of such ranges as the Sierra Nevada and the Rocky Mountains.
During the Neogene, the modern world took shape. The global ecosystems acquired their present configuration and prominent topographic features assumed the forms we are familiar with today .....
Number of words: 1368 | Number of pages: 5 |
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Fishes
<view this essay>.... for vision, olfaction, and hearing. They even posses a system of microscopic organs which can detect changes in water pressure around the shall. Sharks do not possess gills flaps like a fish so a shark must continuously move in order to obtain enough oxygen to survey. The large teeth of a shark are evolutionarily derived from jagged skin scales. Which are apparent on shark’s ancestor’s Placodermi class. The digestion system of a shark contains a “spiral valve” intestinal system, which increases the surface area and lengthens the time food is digested in the unusually short intestine system of a shark. Sharks sexually reproduce. Unlike .....
Number of words: 503 | Number of pages: 2 |
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