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» Browse Science and Environment Term Papers
Effects Of Smoking
Number of Words: 466 / Number of Pages: 2
... smoke also contains carbon monoxide, the same
poisonous gases released from a car exhaust pipe. Carbon
monoxide is a colorless and odorless, highly toxic gas that
reduces the amount of oxygen that the blood can carry.
Combined with the effects produced by the nicotine, it
creates an imbalance in the demand for oxygen by the cells
and the amount of oxygen the blood is able to supply.
Tar is another chemical produced from cigarette smoke.
Tar contains at least 30 cancer causing irritants. Tar is a
mixture of several substances that condense into a sticky
substance on the lung. Tobacco manuf ...
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Fusion
Number of Words: 1845 / Number of Pages: 7
... one, creating a new, larger
particle from the two. Now replace those balls of clay with sub-atomic
particles, and when they meld, release an enormous amount of energy. This is
fusion. There is currently three known variations of fusion: the proton-proton
reaction (Figure 1.1), the carbon cycle (Figure 1.2), and the triple-alpha
process (Figure 1.3). In the proton-proton reaction, a proton (the positively
charged nucleus of a hydrogen atom) is forced so close to another proton (within
a tenth of a trillionth of an inch) that a short range nuclear force known as
the strong force takes over and forc ...
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Lymphoma
Number of Words: 1532 / Number of Pages: 6
... or indolent, slow multiplying. ( Information Network)
The lymphatic system protects the body from agents that could cause disease like bacteria or viruses. Within this system, that consists of organs such as the spleen and tonsils, there are organs that destroy foreign agents, those organs are called lymph nodes. The lymphatic system works as follows; the bone marrow produces blood cells including white blood cells. White blood cells are the cells that find and destroy disease-causing agents. Both B and T cells change a great deal to defend the body from pathogen. It is while the B cells ...
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Iron And Rust
Number of Words: 410 / Number of Pages: 2
... example of this method is galvanizing, in which iron is covered
with zinc. (3) Covering iron with an air proof and also a water proof
substance. This method is the least expensive, therefore it is the most
common.
The forming of rust is known as a chemical reaction. A chemical
reaction is defined as a process by which atoms are redistributed,
resulting in a change in the molecular composition of the substances. Rust
is also known as iron oxide. Rusting is a chemical reaction that takes
place rather slowly. Chemical Kinetics, the study of reaction rates,
states that three conditions must be met ...
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The Geiger-Muller Tube
Number of Words: 227 / Number of Pages: 1
... charge. A rigid wire with a positive charge runs down
the center of this cylinder. The voltage across the wire and cylinder is kept
just below the point at which a spontaneous discharge, or spark, occurs. When a
charged particle or gamma ray enters the tube , it ionizes a gas atom between
the copper cylinder and the wire. The positive ion produced is accelerated
toward the copper cylinder by the potential difference. The electron is
accelerated toward the positive wire. As these new particles move toward the
electrodes, they strike other atoms and form even more ion in their path.
Thus an av ...
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What Is A Plant?
Number of Words: 611 / Number of Pages: 3
... Roots usually grow under ground and
downward. Roots have tiny “hairs” which increase the surface of the roots,
which results in more gathering of minerals and water. Stems are usually
above ground, grow upward, and usually have leaves. Plants that do not
have leaves generally use the stem as the photosynthetic surface, like
cacti. Leaves are still the most common photosynthetic surface on plants,
though. Leaves absorb carbon dioxide and release oxygen. Some leaves of
plants have spines or thorns to provide them with protection from animals.
Certain types of plants have highly modified leaves ...
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Cleaning Up After The Exxon Valdez Was A Mistake
Number of Words: 1317 / Number of Pages: 5
... most of the compounds are nontoxic. Notable exceptions are some of the aromatic compounds, including benzene and toluene.
After a crude oil is spilled in a marine environment, many processes follow.
Typical crude has a density of about 0.85, more or less, and this factor combined with winds, wave action, and currents leads to spreading, which is very rapid during the first 24 hours. During that period most of the components having boiling points below 200[deg.]C volatilize. As a result some of the toxic chemicals such as benzene are removed. (The composition of the floating mixture is further ...
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Fire 2
Number of Words: 3704 / Number of Pages: 14
... Unlike these physical factors, however, fire as a disturbing force is itself influenced by the biota, particularly the plant community. Alteration of the vegetation by any number of factors can influence the nature of a subsequent fire. Fire has similarities to grazing as a force on vegetation because of such feedback effects (Whelan, 1995, 20).
Fire History
When cavemen learned to make and use fire, they could start to live in civilized ways. With fire, they were able to cook their food so that it was easier to eat and tasted better. By the light of torches, men could more easily find the ...
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Turkey Vultures
Number of Words: 2351 / Number of Pages: 9
... analysis shows that the New World
vultures are actually more closely related to storks than to the vultures of
Europe, Asia, and Africa.
Turkey vultures are remarkably successful birds. They range everywhere
from parts of Canada and much of the United States to South America. At home in
deserts, prairies and woodlands, they have even settled close to people in a
number of urban and suburban areas.
Observed in flight, the turkey vulture appears black with the underside
of its wings grayish or silvery, giving the birds a two-toned appearance. They
characteristically hold their wings in a slig ...
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Does Life Exist On Mars
Number of Words: 381 / Number of Pages: 2
... which is an interesting thought.
Just because NASA has found a single cell living creature in a meteorite doesn't
prove anything in my mind. Especially because of the fact that it has been on
earth for 12 years when over this time the cell could have attached itself to
the meteorite.
Nobody knows enough about the subject to start telling the public that this is
true, they should have never released it unless it were defiantly proven to be
fact. NASA has a big name in the world, they should be more carefule next time.
I just hope that whatever NASA had to say to the president in private isn't
differe ...
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