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» Browse Science and Environment Term Papers
The Big Bang And Steady State Models
Number of Words: 1285 / Number of Pages: 5
... no beginning in the past, nor will there be
change in the future. This model assumes the perfect cosmological
principle. This principle says that the universe is the same everywhere on
the large scale, at all times.2 It maintains the same average density of
matter forever.
There are observational evidences found that can prove the Big Bang
model is more reasonable than the Steady State model. First, the redshifts
of distant galaxies. Redshift is a Doppler effect which states that if a
galaxy is moving away, the spectral line of that galaxy observed will have
a shift to the red end. The faste ...
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Privately Owned Gasoline Powered Vehicles Should Be Limited
Number of Words: 1770 / Number of Pages: 7
... or compounds containing the chemical elements carbon and
hydrogen(Gasoline). When the gas is burned in the engine of the car, several
byproducts result. These exhausts include hydrocarbons and oxides of three
elements: Carbon, nitrogen, and sulfur(Emissions). Tiny amounts of poisonous
trace elements such as lead, cadmium, and nickel also are present. Everything
contained in the exhaust affects the environment intensely. Auto engine exhaust
contributes about 50% of today's atmospheric pollution, and in highly populated
and industrialized cities, air pollution consists of up to 80% car ex ...
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Biology Work Requirement 3 Biology Work Requirement 3
Number of Words: 512 / Number of Pages: 2
... (overpopulation)
Trees are logged for the purpose of space. In this day and age the human race is multiplying and therefore we require more space to expand cites and build more houses. To do this world government cut down any forests in their way.
Ø Industrial commercial purposes
Big industries also contribute to deforestation. EG "Macdonald's uses 800 square miles of trees just for the paper packaging of their products". That is an appalling amount of trees that are used just for burger wrappers. A conservation group has found that 11 million acres a year are being logged for use by commerci ...
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Introns And Exons
Number of Words: 653 / Number of Pages: 3
... pre-mRNA consists of splicing and non-coding regions. pre-mRNA
molecules are much longer than the mRNA molecule needed to code for its protein.
The regions that do not code for amino acids; aa, are scattered all along the
coding region. The genes are split with coding regions, called exons, short for
expressed regions; in between the exons the non-coding region called introns
exist. Before the translation of mRNA the introns must be spliced off.
Splicing is an complicated process for the cell. It must locate every intron in
the primary transcript. An average mRNA consists of eight to ten ...
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About All Sharks
Number of Words: 761 / Number of Pages: 3
... or cow sharks, comprise of two families.
Recognized by their six or seven pairs of gill slits, there sharks can often
be found in deep water. The frilled shark (CHLAMYDISELACHUS ANGUINEUS)
who's appearance is quite unmistakable due to it's "eel" like appearance, is
perhaps one the strangest shark that exist today.
FOSSIL RECORD: Shark fossil record is fargmentery at best. Most fossils found
so far consist of nothing but teeth in some cases a few vertebra have been
found. This is rare due to the fact that sharks have bones instead, they have
cartiladge which countrary common belief is r ...
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Hurricanes
Number of Words: 594 / Number of Pages: 3
... air swirls around a tornado center.
As this air swirls in over the sea surface, it soaks up more and more water
vapour. At the storm center, this new supply of water vapor gets pulled into the
thunderhead updrafts, releasing still more energy as the water vapor condenses.
This makes the updrafts rise faster, pulling in even larger amounts of air and
water vapor from the storm's edges. And as the updrafts speed up, air swirls
faster and faster around the storm center. The storm clouds, moving with the
swirling air, form a coil.
In a few days the hurricane will have grown greatly in size and ...
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Why We Have Seasons
Number of Words: 773 / Number of Pages: 3
... at an angle
there is not as much radiation warming the surface. As the earth rotates
and the sun moves further north the temperature increases and the weather
turns warmer. During the three months of spring the sun continues to move
north and warming the earth more efficiently. At around June 21st the sun
is directly facing the tropic of cancer. At this time the movement north
comes to a halt and the earth's surface is at its warmest point, the summer
solstice. It is also known as the longest day of the year when the earth
is furthest away from the sun. During the winter the sun is actually
clo ...
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Benzene
Number of Words: 500 / Number of Pages: 2
... amystery for 40 years. The problem was perplexing because the C(6)H(6) formula indicateda high degree of unsaturation, but does not display the reactivity characteristic of
such compounds.
In 1865, German chemist Friedrich August Kekule von Stradonitz proposed thatbenzene is structurally a planar hexagon in which the six carbon atoms are joined byalternating single and double bonds. Because this simplistic structure could not accountfor all of the unique properties of benzene and its derivatives, German chemist JohannesThiele suggested in 1899 that the bonds between carbon atoms exhibit reson ...
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Internet Security 2
Number of Words: 1595 / Number of Pages: 6
... The first is through passwords. Passwords work only to a certain extent. Many people lack the forethought to make their password something that is not easily guessable. Your name, birth date, or anything that could be guessed with a little bit of thought is a bad idea. The other way to protect a network is to use a firewall. This technology is often effective but can be bypassed, and is often picky about what to let through. In my opinion firewalls give a false sense of security and cannot be used as a sole means of protection. Given enough time most decent computer science majors or anyone ...
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Mononucleosis
Number of Words: 1043 / Number of Pages: 4
... Relapses can occur, but are fairly uncommon. Although you can receive the disease very easily, is not highly contagious, according to the majority of sources.
Symptoms
There are many symptoms associated with infectious , but the symptoms all depend on the individual. The more common symptoms are fatigue, sore throat, swelling of the lymph nodes and malaise. There is usually a change in the white cells and serum of the blood, but it can only be detected by a special test, known as the Mono Spot or the heterophile test. It is possible that the results of the test remain negative until a few week ...
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