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4,611 Essays on Science. Documents 211 - 240

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  • Alchemy

    Alchemy

    The science by aid of which the chemical philosophers of medieval times attempted to transmute the baser metals into gold or silver. There is considerable divergence of opinion as to the etymology of the word, but it would seem to be derived from the Arabic al=the, and kimya=chemistry, which in turn derives from the late Greek chemica=chemistry, from chumeia=a mingling, or cheein, 'to pour out' or 'mix', Aryan root ghu, to pour, whence the word

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    Essay Length: 3,667 Words / 15 Pages
    Submitted: March 31, 2010 By: Janna
  • Alchemy

    Alchemy

    Alchemy, from its beginnings, was a means to transform the human soul from its base (lead) state to its Enlightened and eternal state (gold). Alchemy was the forerunner to chemistry and in the manipulation of materials, alchemists (the ppl who practiced alchemy) developed many of the basic techniques used in chemistry today. The best known goals of the alchemists were the transmutation of common metals into gold or silver and the creation of a panacea,

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    Essay Length: 1,051 Words / 5 Pages
    Submitted: May 28, 2010 By: Monika
  • Alcohol

    Alcohol

    What is meant by binge drinking and how prevalent is binge drinking on college campuses? I think, binge drinking is a period of social situation for to drown one’s sorrows. If we think it is an activity, we can not mistake about this direction. It is sometimes defined as drinking alcohol solely for the purpose of intoxication. There are also non clinical definitions of what constitutes “binge drinking’’. Binge drinkers are not necessarily alcoholics, although

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    Essay Length: 267 Words / 2 Pages
    Submitted: November 25, 2009 By: Janna
  • Alcohol & Drugs

    Alcohol & Drugs

    Alcoholism is a primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. The disease is often progressive and fatal. It is characterized by continuous or periodic: impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial (NCADD)." It's effects on an individual are an indescribable, harsh, reality of what one drug can do to an individual. Some

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    Essay Length: 1,687 Words / 7 Pages
    Submitted: April 20, 2010 By: Mike
  • Alcohol and College Students

    Alcohol and College Students

    Alcohol and College Students Excessive drinking by college students has become a social phenomenon in which College students do not acknowledge the health risks that are involved with their excessive drinking habits. Furthermore, college students do not know enough about alcohol in general and what exactly it does to the body or they do not pay attention to the information given to them. There needs to be a complete saturation on the campuses, with the

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    Essay Length: 1,761 Words / 8 Pages
    Submitted: January 22, 2010 By: Jack
  • Alcohol and Marijuana - Health Factors

    Alcohol and Marijuana - Health Factors

    Family History There are many risk factors for heart disease and cancer. I am going to take a look at mine starting with my diet and ending with alcohol and marijuana use. My diet consists of a lot of burritos, sandwiches, eggs, and cheeseburgers, which can be high in saturated and trans fats. The saturated fat in eggs and beef increase my risk of heart disease along with colon and prostate cancer. The trans fat

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    Essay Length: 571 Words / 3 Pages
    Submitted: November 10, 2009 By: Artur
  • Alcohol and Nutrition

    Alcohol and Nutrition

    Alcohol and Nutrition Nutrition is a course that has two purposes: to provide energy and to maintain body structure and function. Food supplies energy and provides the building blocks needed to replace worn or damaged cells and the nutritional components needed for body function. Alcoholics often eat poorly, limiting their supply of essential nutrients and affecting both energy supply and structure maintenance. Once ingested, food must be digested so it is available for energy and

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    Essay Length: 620 Words / 3 Pages
    Submitted: April 28, 2010 By: Jon
  • Alcohol Vs Cocaine

    Alcohol Vs Cocaine

    Alcohol versus cocaine, these are two different substances by the physical appearance. Alcohol is normally only ingested the one way, where as cocaine can be taken by ingestion, inhalation, intranasal and intravenously. The effects however are quite similar. The effects of alcohol are many, and each is very likely to take place. Alcohol effects judgment, motor coordination, reflexes, sensation, breathing and the way the heart functions. When a person is using alcohol they may experience

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    Essay Length: 1,107 Words / 5 Pages
    Submitted: May 23, 2010 By: regina
  • Alcoholism Among Older Adults

    Alcoholism Among Older Adults

    Alcoholism among Older Adults The American Heritage Dictionary (2000) defines alcoholism as a disorder characterized by the excessive consumption of and dependence on alcoholic beverages, leading to physical and psychological harm and impaired social and vocational functioning. The disease is often progressive and fatal. It is also characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, mostly denial that the problem exists. It

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    Essay Length: 992 Words / 4 Pages
    Submitted: January 3, 2010 By: Steve
  • Alcoholism Among Older Adults

    Alcoholism Among Older Adults

    Alcoholism among Older Adults The American Heritage Dictionary (2000) defines alcoholism as a disorder characterized by the excessive consumption of and dependence on alcoholic beverages, leading to physical and psychological harm and impaired social and vocational functioning. The disease is often progressive and fatal. It is also characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, mostly denial that the problem exists. It

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    Essay Length: 992 Words / 4 Pages
    Submitted: March 8, 2010 By: Vika
  • Alcoholism and Its Effects on the Family

    Alcoholism and Its Effects on the Family

    Alcoholism and its Effects On the Family Alcohol is a very powerful drug. It can ruin someone’s life. It may also be able to ruin everyone that alcoholic lives around. But first what is alcoholism. Alcoholism is a chronic disorder characterized by dependence on alcohol, repeated excessive use of alcoholic beverages, development of withdrawal symptoms on reducing or ceasing alcohol intake, morbidity that may include cirrhosis of the liver, and decreased ability to function socially

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    Essay Length: 648 Words / 3 Pages
    Submitted: December 4, 2009 By: Fatih
  • Alesssandro Volta

    Alesssandro Volta

    Alessandro Giuseppe Antonio Anastasio Volta or Alessandro Volta in short was born in February 18, 1745 in Coma, Lombardy, Italy. Being raised in a poor family by his parents who were Filippo Volta and Maria Maddalena Inzaghia along with eight other sisters and brothers, Alessandro Volta was directed to be a religious person. He was sent to Jesuit school which was the most widely known religious group during the time. Although he was educated to

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    Essay Length: 846 Words / 4 Pages
    Submitted: December 21, 2009 By: Stenly
  • Alfred Nobel: The Man Behind The Prize.

    Alfred Nobel: The Man Behind The Prize.

    Alfred Nobel: The Man behind the Prize. Alfred Nobel is known for starting the Nobel Prize. This prize is given every year to some of the greatest minds in the world who through their work, help to better society. In opposition to the improvement of society, is the fact that Nobel’s other known inventions brought much death and destruction to the world (Frost). This combination of inventions helps to pose the question who was Alfred

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    Essay Length: 348 Words / 2 Pages
    Submitted: February 9, 2010 By: Fatih
  • Alfred Ruseel Wallace

    Alfred Ruseel Wallace

    What Wallace line? Alfred Russel Wallace was trained as a surveyor and an architect. A surveyor is a person who finds the measurement of dimensional relationships, as of horizontal distances, elevations, directions, and angles, on the earth’s surface especially for use in locating property boundaries, construction layout, and mapmaking. An architect is a person who designs and supervises the construction of buildings or other large structures. Wallace created what is called the Wallace line. The

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    Essay Length: 311 Words / 2 Pages
    Submitted: May 18, 2010 By: Fatih
  • Alkenes from Alcohols

    Alkenes from Alcohols

    An elimination ration involves the loss of two atoms or groups from the substrate, resulting in a formation of a pi bond. Elimination may be first-order (E1) or second-order (E2). E1 is a unimolecular because the rate-determining transition state involves one molecule instead of a collision between two molecules, which is seen in E2. In the presence of a strong acid, alcohols protonate to form a good leaving, for example, water. After the loss of

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    Essay Length: 675 Words / 3 Pages
    Submitted: May 3, 2010 By: Mike
  • Alkenes from Alcohols: Analysis of a Mixture by Gas Chromatography

    Alkenes from Alcohols: Analysis of a Mixture by Gas Chromatography

    Alkenes from Alcohols: Analysis of a Mixture by Gas Chromatography Aim: To analyze a mixture of alkenes by gas chromatography. Introduction: In this lab, we specifically used elimination reaction; however we only used the E1 reaction. In the presence of strong acids, alcohols protonate to form a good leaving group, namely water. Upon loss of a proton to a good leaving group, an introduction of unsaturation (a double bond) can be preformed. According to Wikipedia,

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    Essay Length: 860 Words / 4 Pages
    Submitted: May 21, 2010 By: Yan
  • All Quiet on the Western Front by Erich Remarque

    All Quiet on the Western Front by Erich Remarque

    An anti-war novel portrays the awful and consequences of war. “All Quiet on the Western Front” by Erich Remarque is a novel set in the First World War that is against war. The story takes place on the French front, as a German. Remarque describes the terrible reality of the war, focusing on the horrors and involved. The author, Erich Maria Remarque in his novel, All Quiet on the Western Front explores the horrors and

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    Essay Length: 536 Words / 3 Pages
    Submitted: December 3, 2017 By: jasoncarroll224
  • All Women Should Try to Breastfeed Their Babies

    All Women Should Try to Breastfeed Their Babies

    Eden Jumper November 20, 2007 Thomas Treffinger ENG101-041 All Women Should Try to Breastfeed their Babies Can someone really disagree with something they know nothing about? Breastfeeding is among one of those “somethings” people usually disagree with for just moral reasons. Many people do not know how much healthier breast milk is for their baby and everyone should be educated on the benefits. In truth, breast feeding contains many physical and emotional benefits for babies

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    Essay Length: 1,448 Words / 6 Pages
    Submitted: April 3, 2010 By: Fatih
  • Alligators on Treadmills

    Alligators on Treadmills

    Dear Commissioner of the MLB, My brother Andres is very challenged at playing baseball. He can’t throw that good, is horrible at batting and don’t even get me started on his defense. But the worst part is that he thinks he’s good. I try to knock some sense into his empty skull, but he just wont except the fact that he’s challenged at playing baseball. Unlike me I’m very gifted at the all-American past

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    Essay Length: 258 Words / 2 Pages
    Submitted: April 23, 2010 By: Bred
  • Almost All You Want to Know About Colour

    Almost All You Want to Know About Colour

    Almost all you want to know about Colour Rakesh Mohan Hallen COLOUR is often a paradox. An apparently colourless light falling on a colourless water drop can give rise to a rainbow of colours, or one may see colours even when there is no object in view. What, then, is colour? Where does it exist, in the light or in the object? Colour is a sensory perception , caused by the interaction of light with

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    Essay Length: 3,896 Words / 16 Pages
    Submitted: May 4, 2010 By: Yan
  • Alopecia

    Alopecia

    Alopecia: Alopecia areata is the abnormality of the skin that i chose to do my reacearch paper on. Alopecia is a very intriguing autoimmune disease that strickens many across the globe. With this disease, the immune system misteriously attacks the hair folicles. The hair folicles are the point from which hairs grow. This damage to the hair folicles can lead to hair loss on the scalp and elswhere on the body. In the majority of

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    Essay Length: 530 Words / 3 Pages
    Submitted: January 17, 2010 By: July
  • Alpha Andromeda

    Alpha Andromeda

    NS206 STAR OBSERVING PROJECT ALPHA ANDROMEDA Fall 2006-2007 Project Outline: A. General Information About Alpha Andromeda B. Mythological Story of Alpha Andromeda C. Where is Alpha Andromeda on the Sky? D. Observations of Alpha Andromeda E. Reference List A. About Alpha Andromeda: Alpha Andromeda is the brightest star in Andromeda Constellation. Alpha Andromeda, also called Alpheratz, is the northeastern star of the Great Square of Pegasus. Almach, Gamma Andromeda is toward lower left, while

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    Essay Length: 869 Words / 4 Pages
    Submitted: May 14, 2010 By: regina
  • Als Disease Oral Notes

    Als Disease Oral Notes

    ALS- Amyotrophic lateral sclerosis Lou Gehrig’s disease- Yankee B-Ball player 1903-1941 Neurodegenerative disease- Unknown cause breaks tissue down in nervous system. Motor Neurons- they control muscle movement Affects nerves from the brain to the spinal cord (upper motor neurons) then the lower spinal cord (lower motor neurons) which control muscle movement. With this disease, for unknown reasons, these neurons die, meaning a progressive loss of the ability to move nearly any of the muscles in

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    Essay Length: 378 Words / 2 Pages
    Submitted: March 16, 2010 By: Stenly
  • Alternate Fuels

    Alternate Fuels

    Abshire 1 Alternative Fuels “Hydrogen cars... What’s wrong with gasoline?” This is a question that many people have been asking themselves over the last decade. In the past gasoline, or an even broader subject, fossil fuels have been mankind’s primary source of energy. Many people are beginning to think this may not be true for very much longer. The world is starting to revolutionize and move from the past to the future. Fossil fuels

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    Essay Length: 1,888 Words / 8 Pages
    Submitted: January 9, 2010 By: Max
  • Alternative Energy

    Alternative Energy

    Introduction To combat global warming and the other problems associated with fossil fuels, the world must switch to renewable energy sources like sunlight, wind, and biomass. All renewable energy technologies are not appropriate to all applications or locations, however. As with conventional energy production, there are environmental issues to be considered. This paper identifies some of the key environmental impacts associated with renewable technologies and suggests appropriate responses to them. A study by the Union

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    Essay Length: 272 Words / 2 Pages
    Submitted: December 13, 2009 By: Janna
  • Alternative Energy

    Alternative Energy

    Alternative energy is an important factor to help maintain a sustainable world. Without energy, the world would collapse. Everything a sustainable society needs to survive relies heavily on fossil fuels, and because of this, the worlds fossil fuel supply is depleting rapidly. New energy sources need to be tested and used immediately or the fossil fuels will run out permanently and cause the world’s infrastructure to collapse. Fossil fuels such as oil, coal, and natural

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    Essay Length: 310 Words / 2 Pages
    Submitted: February 9, 2010 By: Victor
  • Alternative Energy

    Alternative Energy

    Alternative Energy The United States depends on fossil fuels, like oil and coal, for energy. According to experts these sources will exhaust by the year 2050. Fossil fuels also pollute the environment. So we need to search for alternative energy sources which are reliable and renewable. Wind power is the force of the wind harnessed by windmills and wind turbines that convert it into electricity. Because wind is a clean and renewable source of energy,

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    Essay Length: 264 Words / 2 Pages
    Submitted: March 6, 2010 By: Fatih
  • Alternative Energy

    Alternative Energy

    Lloyd 1 Alternative Energy Sources Energy is all around us. Almost everything that you can see or touch is energy or took energy to make. Even our bodies are made up and made from energy and we can also produce energy but it takes energy to do so. So when you think of it in that way how can anyone say that the United States and even the world may be entering an energy crisis?

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    Essay Length: 4,280 Words / 18 Pages
    Submitted: April 4, 2010 By: Steve
  • Alternative Energy

    Alternative Energy

    Alternative Energy resources are becoming a much bigger deal as the level of fossil fuels remaining on earth slowly depreciates. Another issue is pollution. Eventually we won’t be able to use gas and oil in our cars they will run solely on something like solar energy. Things like Hydroelectric power have been around for many many years, just not with such magnitude or demand. There are four main kinds of alternative energy sources, they are:

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    Essay Length: 473 Words / 2 Pages
    Submitted: April 25, 2010 By: Tommy
  • Alternative Energy and Hybrid Cars

    Alternative Energy and Hybrid Cars

    Alternative Energy and Hybrid Cars This is a time of crisis. The American public, and the entire world for that matter, is at a crossroads. The humans that inhabit the planet called Earth have gradually over the last hundred years destroyed the environment through the use of fossil fuels. According to Christopher Flavin, the use of fossil fuels has caused “ impoverished lakes and estuaries, degraded forests, and millions of damaged human lungs.” (Flavin et

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    Essay Length: 786 Words / 4 Pages
    Submitted: December 12, 2009 By: Tasha

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