Science Essays & Term Papers

263 total

Acid rain is a serious problem with disastrous effects. Each day this serious problem increases, many people believe that this issue is too small to deal with right now this issue should be met head on and solved before it is too late. In the following paragraphs I will be discussing the impact has on the wildlife and how our atmosphere is being destroyed by acid rain. CAUSES Acid rain is a cancer eating into the face of Eastern Cana

In this study, I investigate the affects that running has on reducing the risk of some health problems. I am doing this because I run about 40 to 60 miles per week, and my family has a history of health problems. For instance, my grandfather suffered a heart attack, and he also had cancer when he was about the age of 50. Furthermore, my grandfather, on my dad's side of the family, has also had triple bi-pass heart surgery from a heart attack he has had recently.

Finding good day care can certainly pose a problem these days, unless, of course, you're an African widow bird. When it comes time for a female widow bird to lay her eggs, she simply locates the nest of a nearby Estrildid finch and surreptitiously drops the eggs inside. That's the last the widow bird ever sees of her offspring. But not to worry, because the Estrildid finch will take devoted care of the abandoned birds as if they were her own. And who's to tell the differen

PREFACE In an extensive article in the Summer-Autumn 1990 issue of "Top Secret", Prof J. Segal and Dr. L. Segal outline their theory that AIDS is a man-made disease, originating at Pentagon bacteriological warfare labs at Fort Detrick, Maryland. "Top Secret" is the international edition of the German magazine Geheim and is considered by many to be a sister publication to the American Covert Action Information Bulletin (CAIB). In fact, Top Secret carries the Naming Names column, whi

(May 1987) By Martin H. Goodman MD (this essay is in the public domain) Introduction: AIDS is a life and death issue. To have the AIDS disease is at present a sentence of slow but inevitable death. I've already lost one friend to AIDS. I may soon lose others. My own sexual behavior and that of many of my friends has been profoundly altered by it. In my part of the country, one man in

AIDS and YOU (May 1987) By Martin H. Goodman MD (this essay is in the public domain) Introduction: AIDS is a life and death issue. To have the AIDS disease is at present a sentence of slow but inevitable death. I've already lost one friend to AIDS. I may soon lose others. My own sexual behavior and that of many of my friends has been profoundly altered by it. In

AIDS - What's new ? ------------------- Is the message getting through? We already know enough about AIDS to prevent its spread, but ignorance, complacency, fear and bigotry continue to stop many from taking adequate precautions. We know enough about how the infection is transmitted to protect ourselves from it without resorting to such extremes as mandatory testing, enforced quarantine or total celibacy. But too few people are heeding the AIDS message

Introduction Air pollution is nothing new. Ever since the discovery of fire, less-than-desirable substances have been vented into the air. One of the first air-pollution regulations dates back to the fourteenth century, when King Edward I banned the burning of sea coal in lime kilns. U.S. air-pollution regulations have their roots in British Common Law. But regardless of those efforts, air pollution continues to be a serious local and world-wide problem. Pollution is the pressur

Alchemy, ancient art practiced especially in the Middle Ages, devoted chiefly to discovering a substance that would transmute the more common metals into gold or silver and to finding a means of indefinitely prolonging human life. Although its purposes and techniques were dubious and often illusory, alchemy was in many ways the predecessor of modern science, especially the science of chemistry. The birthplace of alchemy was ancient Egypt, where, in Alexandria, it be

Thesis: We once believed that Earth is the only planet in the Universe that supports life. Today there is overwhelming evidence that not only suggests, but supports the very real possibility that we may share the Universe with other intelligent beings. I. Things in the Sky A. The First Documented Sighting B. The Fever Spreads 1. Pilot En

As most people know our energy supply is slowly running out. We are using energy sources that either pollute the air, take up natural resources or cause damage to other forms of life. Today, we are working on other forms of energy that do not pollute or cause harm to the environment. Here are some: Magnetohydrobynamic Power Magnetohydrobynamic power is where created by plasma. One way is for gases are heated to really high temperature to where the form plasma. They ar

Alzheimer's Disease is a progressive and irreversible brain disease that destroys mental and physical functioning in human beings, and invariably leads to death. It is the fourth leading cause of adult death in the United States. Alzheimer's creates emotional and financial catastrophe for many American families every year. Fortunately, a large amount of progress is being made to combat Alzheimer's disease every year. To fully be able to comprehend and combat

The Computer Underground. The beginning of the electronic communication revolution that started with the public use of telephones to the emergence of home computers has been accompanied by corresponding social problems involving the activities of so-called "computer hackers," or better referred to as the computer underground (CU). The CU is composed of computer aficionados who stay on the fringes of legality. The CU is composed of relatively intelligent

The volleyball match has been going on for over an hour. Both teams have been trading points and side-outs. The ball is set high outside so that the big outside hitter can put the ball away. She comes in hard, plants, leaps into the air and smashes the ball down the line in a twisting motion. As she lands on her right leg, a POP is heard and down she goes. What has just happened is occurring more and more often in athletics, the athlete has just torn the anterior cruciate ligament

Introduction Ordinary matter has negatively charged electrons circling a positively charged nuclei. Anti-matter has positively charged electrons - positrons - orbiting a nuclei with a negative charge - anti-protons. Only anti-protons and positrons are able to be produced at this time, but scientists in Switzerland have begun a series of experiments which they believe will lead to the creation of the first anti-matter element -- Anti-Hydrogen. The Research Early scientists of

Recently, the media has spent an increasing amount of broadcast time on new technology. The focus of high-tech media has been aimed at the flurry of advances concerning artificial intelligence (AI). What is artificial intelligence and what is the media talking about? Are these technologies beneficial to our society or mere novelties among business and marketing professionals? Medical facilities, police departments, and manufacturing plants have all been changed by AI but how? These q

Fantasy is a tough sell in the twentieth century. The world has been fully discovered and fully mapped. Popular media has effectively minimized the legend and the fantastic rumor, though to make up for this it has generated falsities not as lavish but just as interesting. Satellites have mapped and studied the earth, leaving only a space frontier that is as yet unreachable. But standing out is a charming fantasy the modern world has yet to verify or conde

The global energy balance and atmospheric motion mainly determine the circulation of the earth's atmosphere. There is a hierarchy of motion in atmospheric circulation. Each control can be broken down into smaller controlling factors. The global energy balance is an equal balance of short-wave radiation coming into the atmosphere and long-wave radiation going out of the atmosphere. This is called thermal equilibrium. The earth is at thermal equilibrium; ho

Just before the beginning of World War II, Albert Einstein wrote a letter to President Franklin D. Roosevelt. Urged by Hungarian-born physicists Leo Szilard, Eugene Wingner, and Edward Teller, Einstein told Roosevelt about Nazi German efforts to purify Uranium-235 which might be used to build an atomic bomb. Shortly after that the United States Government began work on the Manhattan Project. The Manhattan Project was the code name for the United States effort to develop the atomic bo

I will be discussing the ways to receive, treat, and cope with the disease, Autism. Autism occurs in fifteen out of every ten-thousand births, and is four times more common in boys than girls. Autism is a severely incapacitating lifelong developmental disability that typically appears during the first three years of life. It has been found throughout the world in families of all racial, ethnic and social backgrounds. No known factors in the psychological environment of a ch

U OF T PROFESSORS DEVISE BETTER WAY TO TEST SIGHT IN BABIES In a darkened room at Toronto's Hospital for Sick Children, a baby, its head dotted with electrodes, sits in its mother's lap and watches flashing black and white checkerboards and stripes on a television screen. Soon after the test, doctors will know if the child can see and how well it can see. The testing procedure, which involves measuring brain wave activity pro

Bacterial resistance is a problem that has profoundly impacted the medical community. Bacterial resistance results when bacteria become resistant to individual antibiotics through the development of specific defense mechanisms which render the antibiotic ineffective. This problem has become evident in recent years as numerous cases have been reported in which antibiotics are not effective against the bacteria that they have fought off for years. The recent troubles with bacteri

1. Introduction: This report is the first stage of the design, construction and testing of a balsa wood structure. In April, the design will be tested against classmates' designs, where the design with the highest load/weight ratio wins. The information gained from this report will be used in the construction of the structure. The report is composed of two sections. The first is an evaluation of material properties of balsa, glues and different joint conf

Daniel Bernoulli was born into a family of mathemeticians on February 8, 1700. He was the only person in his family to make an impressive mark on physics. Bernoulli became a Swiss physicist and mathmatician who made enourmous contributions to the world of physics. He uncovered many significant phenomena in hydrodynamics, and in 1738, published his most famous work, Hydrodynamica, which was a study of equilibrium, pressure, and velocity of fluids. He proved t

It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an event called

Picture this. A man is involved in a severe car crash in Florida which has left him brain-dead with no hope for any kind of recovery. The majority of his vital organs are still functional and the man has designated that his organs be donated to a needy person upon his untimely death. Meanwhile, upon checking with the donor registry board, it is discovered that the best match for receiving the heart of the Florida man is a male in Oregon who is in desper

Bioethics, which is the study of value judgments pertaining to human conduct in the area of biology and includes those related to the practice of medicine, has been an important aspect of all areas in the scientific field (Bernstein, Maurice, M.D.). It is one of the factors that says whether or not certain scientific research can go on, and if it can, under which rules and regulations it must abide by. One of the most recent and controversial issues facing our society

To quote Karl Marx, blue boxing has always been the most noble form of phreaking. As opposed to such things as using an MCI code to make a free fone call, which is merely mindless pseudo-phreaking, blue boxing is actual interaction with the Bell System toll network. It is likewise advisable to be more cautious when blue boxing, but the careful phreak will not be caught, regardless of what type of switching system he is under. In this part, I will explain how and why blue boxing works

Bronchitis is the inflammation of the bronchi. It may develop suddenly, following a head cold (acute bronchitis), or it may persist or return regularly for many years, causing progressive degeneration of the bronchi and lungs (chronic bronchitis). Certain people are more susceptible than others; Men are more of a target to bronchitis than women, out numbering them 10 to 1 ©© the reasons are unclear. Of course smokers are 50 times more likely to get chronic bron

There are many different campfire structures that can be built to start a fire while camping. The most common are the teepee, log cabin, dugout, and tunnel structures. Almost anyone can build these fires if he or she follows some key points. A fire needs three elements: air, fuel, and an ignition of some kind. For a campfire the air element is easily accessible; it's the air a person breaths or oxygen. Fuel is equivalent to wood. Sometimes lighter fluid is us

Calcium transport study of SF-9 lepidopteran cells and bull frog sympathetic ganglion cells ABSTRACT The intracellular calcium level and the calcium efflux of the bull-frog sympathetic ganglion cells (BSG) and the SF-9 lepidopteran ovarian cells were investigated using a calcium-sensitive fluorescence probe fura-2. It was found that the intracellular calcium levels were 58.2 and 44.7 nM for the BSG cells and SF-9 cells respectively. The calcium effluxes following zero calcium

Proteins made from ribosomes attached to the rough endoplasmic reticulum enter the lumen of the ER and move to the smooth endoplasmic reticulum. A small vacuole (vesicle) pinches off the smooth ER and carries the protein to the Golgi apparatus, where it is further processed. ------------------------------------------------------------- Mitochondria are bounded by a double membrane. The inner membrane is folded to form little shelves, called cristae,

England went through dramatic changes in the 19th century. English culture, socio-economic structure and politics where largely influenced by the principles of science. Many social expressions occurred due to these changes. Transformations which categorized this time period could be observed in social institutions; for instance: the switch from popular Evangelicalism to atheism, emergence of feminism and the creation of new political ideologies (Liberalism,

1. a) Bulk movement is the overall movement of a fluid. The molecules all move in the same direction. Diffusion however is the random movement of molecules which usually results in a fairly even distribution. In other words the movement is not guaranteed to move in one direction but the probability that it will move in the lower gradient is greater. Osmosis is similar to diffusion but is differentiated by the membrane's behavior. The cell membrane does allow wa

Sensitive chromosome probes recently discovered by a University of Toronto geneticist will make it easier to detect certain types of genetic and prenatal diseases, as well as being used to determine paternity and provide forensic evidence in criminal cases. Probes are short pieces of DNA which bind to, and actually pinpoint, particular sites on a chromosome. Because these new probes are actually repeated hundreds or thousands of time at a particular site, they are much more sensit

Cleft Lip and Palate are facial birth defects. A cleft lip affects the upper lip, ranging from a notch to a complete fissure extending into the nose. A cleft palate affects the roof of the mouth, with a groove that may extend through the dental arch. These abnormalities may occur separately or together. Cleft lip and palate are facial malformations that may occur separately or together. They may also occur in association with other syndromes or birth defects. The separation of the

Geographers can tell you that the one thing that most rivers and their adjacent flood plains in the world have in common is that they have rich histories associated with human settlement and development. This especially true in arid regions which are very dependent upon water. Two excellent examples are the Nile and the Tigris-Euphrates rivers which show use the relationship between rivers and concentrations of people. However, the Colorado River is not such a go

New technologies have always allowed us to do things faster, more efficiently, and more professionally than ever before. Generally, every new technology is a step forward for speed and productivity. But, despite this paradigm, the coming of the latest mail communications innovation has brought many pros and cons with the package. Electronic mail could be the greatest thing since sliced bread, but there are many who find flaws in it. We are now going to take a m

The following bulletin was prepared from Grocery Industry Committee on Solid Waste October 24, 1991 EXECUTIVE SUMMARY Solid waste composting is an important component of an integrated solution for solid waste management. Composting can divert organic, compostable materials, not otherwise recycled, from the solid waste stream and convert them into a useful product. Composting is environmentally sound, technically and economically feasible and meets local waste management needs. T

The meaning of Hacker is one who accesses a computer which is supposably not able to be accessed to non authorised people of the community. Hackers may use any type of system to access this information depending on what they intend on doing in the system. Methods Hackers may use a variety of ways to hack into a system. First if the hacker is experienced and smart the hacker will use telnet to access a shell on another machine so that the risk of getting caught is

Computer hackers in today's world are becoming more intelligent. They are realizing that people are developing more hack-proof systems. This presents the hackers with a bigger challenge, which brings out more fun for them. The government is realizing this and needs to make harsher laws to scare the hackers more. With the increase in hacking and hacker intelligence, governmental regulation of cyberspace hasn't abolished the fact that it's nearly impossible to bring a hacker to justice

Computers are the future whether we like it or not. Some people dislike computers, because of the complications it takes to understand the basics. Computers are not exactly the easiest tools to work with, but they are the most rewarding, and they are the future. Future cars will all be run by computer. You will be able to talk to a car and it will take you to your destination. Telephones are technically computerized. You will soon be able to talk to a person on the telephone as we

Computers: Invention of the Century The History of Computers Only once in a lifetime will a new invention come about to touch every aspect of our lives. Such devices changed the way we manage, work, and live. A machine that has done all this and more now exists in nearly every business in the United States. This incredible invention is the computer. The electronic computer has been around for over a half-century, but its ancestors have been around for 2000 years. However,

In the 1950's, computers were a new race of machines and most common person did not know anything about them. Today, computers and new Innovation like the internet has changed the business world and even our daily lives. How did it change the business world and our own personal lives and is it for the best, that's what will be discussed in this report. Contents Summary 1 Introduction 3 When were computers invented Brief history

Coral reefs are arguably the world's most beautiful habitats. Coral reefs have been called the rainforests of the oceans, because of the rich diversity of life they support. Scientists have not yet finished counting the thousands of different species of plants and animals that use or live in the coral reef. There are three types of coral reefs: fringing reefs, barrier reefs, and atolls. Fringing reefs are located close to shore, separated from land by only shallow water. Barrier reef

Corrosion and Rusting Introduction Some people may be annoyed by their car "wearing out". Kids may have trouble with rust forming on their bicycles. One may think how to prevent rusting, but do one knows what is happening when a metal corrode? "Corrosion is defined as the involuntary destruction of substances such as metals and mineral building material by surrounding media, which are usually liquid (i.e. corrosive agents)." Most metals corrode. During corrosion

In my short life on this planet I have come to question things that many take upon blind faith. We all know that we must some day die; yet we continuously deny the forces at work inside ourselves, which want to search out the answers of what may or may not come after. It is far easier for humanity to accept that they will go to a safe haven and be rewarded for their lives with pleasures and fantasies of an unfathomable scale than to question the existence of a supposed omnipotent bei

Mrs. Brew 13 May 1996 Intelligent Design of the Universe The search for knowledge about the origin of humanity is as old as its inhabitants. Since the early 1800's mankind has narrowed the debate to creation by a Supreme Being and the theory of evolution. Ever since then, science has been at odds against religion. Now it appears that science is returning to religion. Scientists are finding proof that the universe was created by a Supreme Being. The word evo

Creation vs evolution, was man created be an almighty god, or is he simply a product of modern science. This question has puzzled scholarly minds for many years and yet will for many to come. The one that makes the most sense to me and has the most supporting evidence, is evolution. Not the normal, goop to fish to creature to monkey to man, obviously I skipped some, but one not so greatly known. It is called punctual equalibrium. Punctual equalibrium is a type of evolution st

Definition of Religion: Religion is norms,values, or a way of life to an individual or community. A spiritual guide that governs the way a person lives from day to day by giving that person hope, belief, and reason to exist in this world. Religion can be whatever that person makes of it. Religion can be a persons assets, family, or other individuals or possessions, it can be many things besides worship to a "God" or "Deity". It can be whatever a person dee