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Science and Nature Term Papers and Reports |
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Lamarck's Influence On The Development Of Darwin's Theory Of Evolution
1954 Words - 8 Pages.... pioneers was Jean-
Baptiste Lamarck. Lamarck believed in deism and advocated natural religion based
on human reason. He believed in the harmony and rationality of the world. And
although flawed, the work of Lamarck did not go unnoticed, however. Darwin also
believed in the harmony of the world, and it was Darwin himself who said that
Lamarck was the first man whose conclusions on evolution brought about
excitement and attention. He was the one who showed law in organic and inorganic
species evolution. As it turned out, the work of Lamarck was quite influential
on Darwin. Lamarck's views on inheritance of characteristics can be seen in
Darwin's accounts of natural select ....
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Formation Of Protocells
797 Words - 3 Pages.... 99.5 % of all matters. In fact, the percentage of essential elements of life -- C, N, O, H, P, and S -- are quite similar from individuals to individuals.
Energy wise, the Earth had plenty from a variey of sources Radiation: from the cosmic and radioactive isotope decays UV light: there were no protective ozone layer and thus immense heat. Electrical discharge from the never ending lightning caused chemical reactions to occur very often and there was also another source of heat from the young earth crust which was volcanically active.
For most chemical reactions to take place, a spark of electricity is needed, and this was provided by the lightning in the atmosphere. ....
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Tsunamis
3181 Words - 12 Pages.... of for the past two thousand years. They have been portrayed in much of the cultural art and through the tales in their oral tradition.
In its most simplified form, a tsunami can be defined as a series of waves most commonly created by violent movement of the sea floor. A tsunami is a towering ocean wave generated by tectonic displacements such as undersea earthquakes, landslides, cosmic collisions, or volcanic eruptions. There is a common misconception that a tsunami is a tidal wave. Although the impact of a tsunami on a coastline may change depending upon the tidal level at the time when one occurs, tsunami waves are unrelated to tides. Instead, tides are the pro ....
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Crystals
424 Words - 2 Pages.... the themselves are almost pure. To optimize the separation efficiency large with a small size distribution have to be formed.
The operation of crystallization is exacting. Large—capacity evaporators are not suited to the careful control and flexible manipulation required for a successful ‘strike’, or actual crystallization, of solid sugar . For this purpose, the concentrated liquor is transferred from the evaporators to the ‘pan.’ The pan is essentially a simple vacuum evaporator in which the removal of water continues until the concentration is appropriate for crystallization. As this proceeds, juice continues to be drawn into the pan in order to maintain ....
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Crystals: Does Surface Tension Affect The Process Of Crystallization?
1915 Words - 7 Pages.... conducted to prove
if that is true or not.
INTRODUCTION AND RESEARCH
Many scientists have been interested in crystals and the science
associated with crystals. Though one knows that certain conditions must be
present in order for crystals to form; and if some of these conditions are
not present or are not perfect, then the formation of the crystal will be
disturbed. One may ask him/herself, how is the formation disturbed if only
one of the condition would happen to be modified? Most crystals are formed
under water or under liquids with similar characters to water; and tend to
form under liquids or solutions containing a maximum amount of solute. If
the liquid absorbs ....
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Salt Water Can Support An Electrical Current
904 Words - 4 Pages.... limited to water. Alcohol is also a common solvent. Solutes are usually solid substances, and they are not limited to only being solids, for example another liquid can be the solute.
Some liquids can dissolve in each other in any proportion; others have limits. If a solute added to a solution above a certain amount will not dissolve, the solution is called saturated. For most substances, solubility increases with increasing temperature of the solvent. In general, molecules that are structurally similar to the molecules of the solvent have the highest solubility. When a solute is added to a solvent, several physical properties of the solvent change. Its boiling point ri ....
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Lung Cancer
689 Words - 3 Pages.... (World Book, “”). Small cell usually exists early and spreads out abruptly (Virtual Hospital, 3/23/99). Non-small cell is first confined to the lung, then spreads throughout the chest (MSKCC, “”). Small cell spreads quickly (World Book, “”).
In the United States 85 to 90 percent of all cases are related to smoking. Cigarette smoking is the main cause of (Scientific American, “”). Second-hand smoke, inhaled by non-smokers, increases a person’s chance of acquiring (Beau Halton). Men who smoke increase their chance of dying from about 23 times and women increase their chances 13 times (“ Awareness Campai ....
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Devastation Of The Rain Forests
1653 Words - 7 Pages.... to cooperate and live in harmony with the environment, especially
the rainforest of South America. In the end, the destruction of the
rainforests will mean the destruction of mankind.
The devastation of the rainforest may be compared to playing a game
of Russian Roulette. One-forth of existing medicines comes from tropical
plants whose homes are in the rainforests of South America. For every acre
that is lost in the burning season, there is one acre less that we have for
possible life saving medicines. About 70 percent of plants used in anti-
cancer drug come are the rain forest. We are slowly destroying the
environment and ourselves. Whether we realize ....
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