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» Science Essays and Papers
El Nino La Nina
<view this essay>.... the clouds that were formed over the Equator, are blown easterly towards the western seaboard. Also, the Jet Stream is altered so that it blows directly over the Atlantic Ocean, thus dramatically decreasing hurricanes for that year.
But when the warm waters brought on by El Nino recede, the cold waters of the Pacific Ocean move eastward and bring with it La Nina, the little girl. La Nina has a variety of different names such as El Viejo, anti-El Nino or simply "cold event". When the warmer Pacific water is pushed westward by the trade winds, that water flows toward Asia and makes room for the colder, deep sea water, to rise and flow to the Americas. Beca .....
Number of words: 622 | Number of pages: 3 |
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Daltons Atomic Theory
<view this essay>.... the hypothesis that the sizes of the particles making up different gases must be different.
Dalton's exceptional gift for recognizing and interpreting patterns in experimental data lead him from a problem in meteorology to the idea of atoms as fundamental constituents of matter. He realized the vital theoretical connection between atomic weights and weight relations in chemical reactions. He was the first to associate the ancient idea of atoms with stoichiometry.
The existence of atoms was first suggested more that 2000 years before Dalton's birth. (Newton's speculations about atoms in the Principia were carefully copied by hand into Dalton's notebooks.) .....
Number of words: 371 | Number of pages: 2 |
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Greenhouse Effects Speech
<view this essay>.... the beginning of the industrial revolution, atmospheric concentrations of carbon dioxide have increased nearly 30%, methane concentrations have more than doubled, and nitrous oxide concentrations have risen by about 15%. Because of the increase of concentrations of these gasses, more energy is trapped within the Earths atmosphere, which is slowly increasing the average heat levels. Scientists predict that the average temperature will rise 1.6 – 6.3°F by the year 2100, which could wreak havoc with climates around the world.
Why are greenhouse gas concentrations increasing? Scientists generally believe that the combustion of fossil fuels and other human a .....
Number of words: 534 | Number of pages: 2 |
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Solar Cells
<view this essay>.... In the simplest model of the atom, electrons orbit a
central nucleus, composed of protons and neutrons. each electron carries one
negative charge and each proton one positive charge. Neutrons carry no charge.
Every atom has the same number of electrons as there are protons, so, on the
whole, it is electrically neutral. The electrons have discrete kinetic energy
levels, which increase with the orbital radius. When atoms bond together to form
a solid, the electron energy levels merge into bands. In electrical conductors,
these bands are continuous but in insulators and semiconductors there is an
"energy gap", in which no electron orbits can exist, between .....
Number of words: 1163 | Number of pages: 5 |
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DNA
<view this essay>.... in the order of these bases along
the length of the DNA ladder. All DNA molecules consist of a linked series of
units called nucleotides. Each DNA nucleotide is composed of three subunits: a
special sugar called deoxyribose, a phosphate group that is joined to one end of
the sugar molecule, and one of several different nitrogenous bases linked to the
opposite end of the deoxyribose. DNA has two specific functions: to provide foe
protein synthesis, and hence the growth and development of the organism and to
furnish all descendants with protein-synthesis and hence the growth and
development of the organism. So all living things on plant Earth contains the
gen .....
Number of words: 849 | Number of pages: 4 |
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Alcoholism 2
<view this essay>.... but drinking among the young and among women is increasing. Consumption of alcohol is apparently on the rise in the United States, countries of the former Union of Soviet Socialist Republics, and many European nations. This is paralleled by growing evidence of increasing numbers of alcohol-related problems in other nations, including the Third World.
Development
Alcoholism, as opposed to merely excessive or irresponsible drinking, has been variously thought of as a symptom of psychological or social stress or as a learned, maladaptive coping behavior. More recently, and probably more accurately, it has come to be viewed as a complex disease entity in i .....
Number of words: 799 | Number of pages: 3 |
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The Aging Process
<view this essay>.... these figures have very little to do with potential life expectancy, because most people have their life altered and cut short from disease and disability, not from aging.
No one is so old
as to think he cannot
live one more year.
-- Cicero (106-43 B.C.)
It is still true that approximately 70% of all deaths in the United States are from heart disease, strokes, and cancer. Other diseases, accidents, and violence account for the rest--but not age. These same diseases and Alzheimer's disease account for much of the disability attributed to aging. As these diseases are conquered, far more people will live to their full potential life span and remain active .....
Number of words: 1487 | Number of pages: 6 |
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Is There Life On Mars
<view this essay>.... and on to great a scale to form all the microscopic complexities of organisms, and the great expanses of the Universe. Creationists believe that God (or some form of deity)
Created the Universe by divine power, and that the above mentioned complexities could only be achieved by a Supreme Being.
The age of Mars has been reported to be between 3.6 billion and 1.3 billion years old, "depending on who you ask" (Erjavec, 1). These ages come from the estimated ages of meteorites found on Earth that are believed to have originated on Mars (Meteorites from Mars, 1). The meteorites were dated using radiometric dating methods (Erjavec, 1).
The most widely acce .....
Number of words: 888 | Number of pages: 4 |
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