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» Browse Science and Environment Term Papers
Air Polution
Number of Words: 1424 / Number of Pages: 6
... and liquid
aerosols suspended in the atmosphere. These arise from the burning of coal and
from industrial processes. Atmospheric particles can scatter and absorb sunlight
which reduces visibility. Particles also reduce visibility by attenuating the
light from objects and illuminating the air causing the contrast between the
objects and their backgrounds to reduce. Not only does it effect visibility, but
it hastens the erosion of building materials and the corrosion of metals,
interferes with the human respiratory system, and brings toxic materials into
the body. The small particles cause chronic bronch ...
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Fuel Cell
Number of Words: 1167 / Number of Pages: 5
... fuel, which is one of the most abundant chemicals in the universe, and oxygen from the air are electrochemically combined in the to produce electricity. Heat and pure water vapour are the only by-products of the .
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 in the form of usable electric current through an external circuit. The remaining ...
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Dietary Fibre
Number of Words: 4095 / Number of Pages: 15
... overindulgence may cause adverse effects.
Lastly the importance of high fibre foods in conjunction with a healthy lifestyle is presented as the 'formula' for a healthy body and avoidance of fibre depleted foods, a fact which is sadly abundant nowadays, is also mentioned.
Since ancient times, foods containing complex carbohydrates have been considered to be the ones with most nutritional value. Even the Bible speaks of how the complex carbohydrate manna miraculously sustained the children of Israel during their progress through the wilderness. Bread, of course, became known as the staff of life, and pot ...
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From Water To Land
Number of Words: 1191 / Number of Pages: 5
... to its fish ancestry, but still anatomically far from its terrestrial relatives. These creatures still lived in water, but they had a lot of the terrestrial tetrapod anatomical characteristics.
Introduction:
Before tetrapods existed, all vertebrates were confined to living in aquatic habitats. The only animals that lived on land were arthropods. Through natural adaptations, the fish developed into amphibians. This colossal stage of change made necessary the evolution of new ways of breathing, locomotion, and reproduction. Paleontologists needed to understand how this transition took place. If the c ...
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Nuclear / Particle Physics Effects Of The Atomic Bombs On Hiroshima And Nagasaki
Number of Words: 2095 / Number of Pages: 8
... and more free neutrons are also released. These neutrons then in turn strike other atoms, which causes more energy to be released. If this process is repeated, a self-sustaining chain reaction will occur, and it is this chain reaction that causes the atomic bomb to have its destructive power (World Book, 1990). This chain reaction can be attained in two different ways.
The first type of atomic bomb ever used was a gun-type. In this type two subcritical pieces of U-235 are placed in a device similar to the barrel of an artillery shell. One piece is placed at one end of the barrel and will remain ther ...
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Global Warming Extended Definition Essay
Number of Words: 1142 / Number of Pages: 5
... around the world). A recent tree-ring study indicated that this is the warmest decade in six hundred years (Allen & Herreid, 82). Undeniably, the weather is getting warmer. According to an article in The Economist, a conservative newsmagazine,
"The sea is warming, the plankton dying; floods are sweeping the land. In California, the climate is acting in a peculiar way. So, too, in Antarctica, where unlooked-for flowers are blooming as the ice shelves disintegrate…In Southern Africa, it looks as though the rains will fail. Again. All over the world, there is something odd about the weathe ...
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Fossil Fuel Consumption, CO2 And Its Impact On Global Climate
Number of Words: 1552 / Number of Pages: 6
... and the
development of renewable energy sources will be needed to sustain economic
growth. The quantity of ultimately recoverable fossil fuels is limited by
geology and remains a matter of suspicion, but the view of the 1970s that
scarcity was imminent is still popular. It is the 1973 Oil Crisis marked the
transition from abundant, low-cost energy to an era of increasing prices and
scarcity. Today concerns over scarcity have been overtaken by the question of
whether human beings can afford to meet the environmental costs of continued
fossil fuel consumption. One of the most widespread concer ...
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Intranet
Number of Words: 734 / Number of Pages: 3
... recently introduced in the market. However, it just has not been widely used until the past few years. People use everyday without knowing that they are using it. , therefore, is the client/server, PC, Unix, Apple and many other applications that one has been using on his/her work. Security on the Internet is just as hazardous as the . Any leakage of information through the transmission of data is possible. Most, the and the Internet shares a common purpose, that is, to provide efficiency for the user in accessing information and all the applications.
Comparing the Internet to the , lacks many chara ...
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Computers
Number of Words: 2363 / Number of Pages: 9
... become one of the many risks that society must face if it would enjoy the benefits of modern technology.
Imagine a world without . That would mean no proper means of communicating, no Internet, no video games. Life would be extremely difficult. Adults would have to store all their office work paper and therefore take up an entire room. Teenagers would have to submit course-works and projects hand-written. All graphs and diagrams would have to be drawn neatly and carefully. Youngsters would never have heard of 'video-games' and will have to spend their free time either reading or playing outside with ...
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Design Of A Psychological Experiment
Number of Words: 470 / Number of Pages: 2
... that is to hit the baseball.
3) Will you treat all the participants in the same way? No, I would not treat
all the participants in the same way. The control group would not be given
caffeine. However, I would treat all experimental groups the same because that
will give more accurate results. If the participants were not treated the same
I would not be able to accurately measure how much or how little the caffeine
affected the students.
4) How will you select the participants of your study so that they are
representative of the students enrolled at UMCP? I would randomly chose
participants of d ...
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