Science
The scientific world contains a wealth of knowledge that enables mankind to live the way it does. EssaysForStudent.com can help you close the gaps in your knowledge.
4,609 Essays on Science. Documents 4,561 - 4,590
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Who Owns Life?
Sean Grayson Chemistry Essay I went to a lecture that was called “ Who Owns Life?” The person who spoke at this lecture was David Magnus, Ph.D. He is the Assistant Professor and Graduate Studies Director at the Center for Bioethics at the University of Pennsylvania. I learned things that and did not know about my DNA and my body. The questions were raised, “ Do we own our bodies?” and “ Who plays God
Rating:Essay Length: 477 Words / 2 PagesSubmitted: December 15, 2009 -
Who Should Given the Credit for Defeating Smallpox?
Even though Edward Jenner was the only man to discover how to prevent the disease of cowpox, does he deserve all the credit? And if not who else helped in eradicating this terrible disease? First of all by the middle ages there was a way of preventing smallpox called ‘variolation’ in which involved introducing pus, or scabs, from an infected person to a healthy one. This originated in China and India. This process was
Rating:Essay Length: 427 Words / 2 PagesSubmitted: November 30, 2009 -
Why and How Do We Breathe?
HOW AND WHY DO WE BREATHE REFERENCES: I. Essay pp. 3-5 II. References p. 6 The diaphragm is a muscle in the chest cavity that contracts and relaxes according to signals received by the respiratory center in the brain. In doing so, the diaphragm changes the pressure in the cavity. When the diaphragm contracts, it increases the volume of the chest cavity and lowers the air pressure, thus, air rushes in. This is called inhalation.
Rating:Essay Length: 283 Words / 2 PagesSubmitted: April 1, 2010 -
Why Are Living Organism So Diverse?
Why are Living Organism so Diverse ? Regardless of world’s life diversity, we all, from the ant to the whale and us humans have DNA linkage, which gives us the evidence for one common ancestor. The question that comes up now is how from this very primitive common ancestor did we all end up so diverse. Biologist have dedicated they life to answer this question, Through this essay I shall show how through different aspects
Rating:Essay Length: 1,512 Words / 7 PagesSubmitted: November 16, 2009 -
Why Dinosaurs Are Extinct
Here's what's known about the asteroid that may have killed the dinosaurs. The end of the era of the dinosaurs (the end of the Cretaceous period and the beginning of the Tertiary period, known as the K-T boundary) is thought to have been brought about by the impact of a large asteroid 6-12 miles wide and traveling at 15 miles per second. The asteroid landed at Chicxulub (can you pronounce that?), near the tip of
Rating:Essay Length: 368 Words / 2 PagesSubmitted: March 1, 2010 -
Why Do Fireflies Glow?
Why do Fireflies Glow? Matthew Lee Perlmutter Fireflies have evolved the ability to send from their abdomen as a means of communication with each other. The most important reason for the flashing is for sexual communication. Flash signals have been classified into two systems. One is where a continuously glowing female attracts a non-glowing male. The second is when a female, flashes a species-specific response to a flying male, who is broadcasting a pulsating signal.
Rating:Essay Length: 608 Words / 3 PagesSubmitted: November 25, 2009 -
Why Do We Eat - New Insight into the Role of Brain Neurotransmitters
Why Do We Eat: New Insight into the Role of Brain Neurotransmitters Eating has taken its toll on people who live in the United States. One of the largest problems that people have is deciding how much to eat and what is healthy to eat. It was determined in the 1930s-1940s that the brain has a tremendous impact in controlling our eating habits. The main part of the brain, which controls this, is the hypothalamus.
Rating:Essay Length: 686 Words / 3 PagesSubmitted: December 4, 2009 -
Why Iran Needs Nuclear Power
Many disturbing words are written about Ahmadinejad, Iran’s leader. That he believes the next Imam is coming. That a child who was thrown down a well will rise again. That he denies the holocaust. That he supports the cause of the working class in Iran. That he wants his country to have nuclear power. But let's not be hasty about his beliefs. America has a leader who believes that a man who was nailed to
Rating:Essay Length: 583 Words / 3 PagesSubmitted: February 14, 2010 -
Why Is Altruistic Behaviour Problematic for the Theory of Natural Selection?
Nice guys finish first, a chapter title in R. Dawkins’ revolutionary popular science book the Selfish Gene. Although true altruism can not exist according to the classical theory of natural selection if such an evolutionary protagonist as RD has time for it, then there must be a good reason. In fact, we see much behaviour in nature that appears altruistic: alarm calling, guarding, defence and foraging by non-reproductives and grooming are just a few examples.
Rating:Essay Length: 1,757 Words / 8 PagesSubmitted: March 21, 2010 -
Why Is Sex Fun?
WHY IS SEX FUN? If you were a male would you rather have a beautiful, impressive, long tail that attracts a lot of women or would you rather have a shorter, less attractive tail that enables you to escape from predators more easily? Living out in the wild among many potential predators, a shorter tail would seem more logical since it would be a more useful trait than a good-looking one. Though the most logical
Rating:Essay Length: 2,862 Words / 12 PagesSubmitted: January 10, 2010 -
Why Moon Has Phases - Bad Paper
Over a 30 day period, I observed and recorded data concerning the moon, and I found that it varies in shape, color and the direction it can be found. Some people may have the impression that the moon grows and shrinks, or they may just have never realized that our moon is lit by the sun. As our moon revolves around us, it goes through phases depending on which side of it receives light from
Rating:Essay Length: 317 Words / 2 PagesSubmitted: November 21, 2009 -
Why People Live in Tectonic Zones?
For millions of years people have lived in areas where two different plates meet. In theses types of areas it is very common for earthquakes to happen and for volcanoes to form. So why if these are such dangerous places to live do people continue to settle here? One reason may be that people believe that the types of natural disasters that are possible will never affect them in their lifetime. It is impossible to
Rating:Essay Length: 275 Words / 2 PagesSubmitted: June 6, 2010 -
Why Periodontal Disease Should Be a Concern to All
Brodoski 1 Laura Brodoski English 102 Ms. Vatcher, MA 1 October 2002 Why Periodontal Disease Should be a Concern to All. Periodontal disease is more commonly known as gum disease or gingivitis. This infection is serious enough, that it can lead to tooth loss if left untreated. This chronic infection starts around the tooth and it affects the supporting bone and gums. Periodontal disease can affect anywhere from one tooth to all thirty-two teeth. The
Rating:Essay Length: 1,203 Words / 5 PagesSubmitted: December 12, 2009 -
Why Some Bacteria Are Becoming Antibiotic Resistant
Almost 60 years ago the first antibiotics were developed, and they were created at a time when previously untreatable infections such as tuberculosis, gonorrhea, and syphilis could be almost miraculously cured. Infections like these could be a death sentence, and until recently they many be just that again. Microbes are learning the ability to fight of these antibiotics and become resistant to them. They are gaining resistance through a number of different ways, and science
Rating:Essay Length: 2,006 Words / 9 PagesSubmitted: December 25, 2009 -
Why the Sea Is Salt
Why is the sea salt? One theory states that the sea is salt because of the “mid-Ocean” rift. Fresh basalt flows up through the rift along with “juvenile water; water that is made up of many of the components of sea water including chlorine, bromine, iodine, and many other molecules. Also some salts get into the ocean through volcanoes and even fresh water rivers carries salt into the sea. The sea is composed of many
Rating:Essay Length: 382 Words / 2 PagesSubmitted: November 15, 2009 -
Wilderness
Cory Graham Wilderness, from A Sand County Almanac by Aldo Leopold GEOG 111 Section 004 December 2, 2005 In this chapter titled “Wilderness,” the author is discussing how man has tampered with what was originally created by Mr. Almighty, named wilderness. He is also discussing issues surrounding the preservation, adversaries, exhaustion, and the breaking down of wilderness for the transportation and industrialization of today’s society. The author mentioned how some certain values of wilderness should
Rating:Essay Length: 1,480 Words / 6 PagesSubmitted: March 14, 2010 -
Wildlife Refuges
Are refuges in Trouble? There are 542 refuges in the U.S. comprising 95 million acres of protected land. Individual refuges serve as a multitude of purposes, including protecting endangered plants and animals and their habitats, preserving wilderness areas, providing outdoor recreational and educational opportunities, and providing lands and waters for traditional uses such as hunting and fishing. One would think that from the overall ownership of land and wonderful activities that the refuges provide, animals
Rating:Essay Length: 1,586 Words / 7 PagesSubmitted: December 19, 2009 -
Will the Seeds Change Colors If the Water Has Blue Dye in It?
Question: Will the seeds change colors if the water has blue dye in it? Introduction Fast Plants (brassica) are members of the crucifer family of plants, closely related to cabbage, turnips, broccoli and other cruciferous vegetables. They were bred for over 30 years at the University of Wisconsin. The entire life cycle for Fast Plants® is extremely short, and under ideal growing conditions of continuous light, water, and nutrition, plants will produce harvestable seeds approximately
Rating:Essay Length: 569 Words / 3 PagesSubmitted: November 29, 2009 -
Wimax
Wi-Fi Glossary Find a Wi-Fi Term Wi-Fi® is a registered certification mark of the Wi-Fi Alliance internet.commerce Be a Commerce Partner Education Online Memory Giveaways Mortgage Refinance Compare Products Computer Parts Corporate Gifts Web Programming Cell Phone Plans Prepaid Calling Cards Mortgage Refinancing PDA Phones & Cases Phone Systems internet.com Developer Downloads International Internet Lists Internet News Internet Resources IT Linux/Open Source Personal Technology Small Business Windows Technology xSP Resources Search internet.com Advertise Corporate
Rating:Essay Length: 1,005 Words / 5 PagesSubmitted: March 4, 2010 -
Wing Pattern Evolution and the Origins of Mimicry of North American Admirals
Admiral butterflies (genus Limenitis) are a particularly appealing system to address questions regarding wing pattern evolution and speciation. This genus is unusual among other butterflies in that mimicry has evolved multiple times and hybridization is frequent between wing pattern forms. An interesting fact of wing pattern evolution within this genus is the apparent differences between the largely stereotypic Paleartic fauna and the highly variable Nearctic forms of butterflies. Palearctic and Nearctic forms regard to different
Rating:Essay Length: 1,802 Words / 8 PagesSubmitted: December 20, 2009 -
Winning the War on Cancer
Jasmine Garcia Professor Petkovic English 101 Rough Draft Winning the war on Cancer Scientists are creating entirely new immune-therapies by modifying the genes of viruses, old diseases that are effectively being turned into the equivalent of guided missiles of cancer destruction. Generations of doctors have treated their cancer patients with surgery, radiation, and chemotherapy in hopes that they could slow or reverse cancer growth before the therapies’ would kill their patients. Dr. Carl June, Dr.
Rating:Essay Length: 1,214 Words / 5 PagesSubmitted: May 23, 2016 -
Wireless Communications
Wireless Communications Wireless communications are everywhere. People around the world regularly send and receive messages wirelessly, that is, transmitted through the air. Three types of wireless communications include wireless messaging services, wireless Internet access points, and global positioning systems. People use mobile phones, PDAs, and other mobile devices to access text messaging, instant messaging, and picture messaging services (Davies 34-42). Through text messaging services, users send and receive short text messages, which usually consist of
Rating:Essay Length: 333 Words / 2 PagesSubmitted: November 15, 2009 -
Wonderful World of Satellites
Satellites affect our lives every day, and we often don’t even realize it. They make our lives safer, more convenient, and provide entertainment. Here are some of the jobs satellites do. Television Satellites send television signals directly to homes, but they also are the backbone of cable and network TV. These satellites send signals from a central station that generates programming to smaller stations that send the signals locally via cables or the airwaves. “At
Rating:Essay Length: 763 Words / 4 PagesSubmitted: February 15, 2010 -
Work
In High School I took several art classes. The last one I took, my senior year, probably left the biggest impression on me. Not because of what the teacher gave me, but because of what I gave myself. My teacher’s name was Mrs. Lerose, from now on Mrs. L as we used to call her, or at least what we called her behind her back and when we were feeling brave (she didn’t like that
Rating:Essay Length: 1,135 Words / 5 PagesSubmitted: January 15, 2010 -
Workplace Safety, Patient Safety and Health Care Employment Issues
There is risk for employees who provide dialysis care to patients, as there is in any other healthcare setting. The employees may be exposed to falls, back injuries from lifting heavy patients, infectious diseases, and sharps. These potential injuries can result in lost employee time, and also in costly worker's compensation settlements, so it is vital to establish written guidelines for staff to prevent basic safety pitfalls that can crop up every day. Keeping
Rating:Essay Length: 890 Words / 4 PagesSubmitted: May 2, 2011 -
Workplace Safety, Patient Safety and Health Care Employment Issues
There is risk for employees who provide dialysis care to patients, as there is in any other healthcare setting. The employees may be exposed to falls, back injuries from lifting heavy patients, infectious diseases, and sharps. These potential injuries can result in lost employee time, and also in costly worker's compensation settlements, so it is vital to establish written guidelines for staff to prevent basic safety pitfalls that can crop up every day. Keeping
Rating:Essay Length: 890 Words / 4 PagesSubmitted: May 2, 2011 -
World Genetic Disease Project - Severe Combined Immunodeficiency
World Genetic Disease Project- Severe Combined Immunodeficiency Severe Combined Immunodeficiency (SCID) or more commonly known as the bubble boy disease can cause newborns to have a weak or no immune system. It causes them to get infectious diseases that can kill them but if treated and diagnosed soon enough it can go away. A magority of the people that have SCID are treated for an X-linked SCID which can be responsible for about 45% of
Rating:Essay Length: 902 Words / 4 PagesSubmitted: May 18, 2017 -
Worms
Worms Earthworm Dissection Purpose: Earthworms, also known as night crawlers are in the phylum Annelida. To learn more about an earthworm, and its external and internal anatomy, would be to participate in an easy earthworm dissection lab. First, it would be beneficial to know simple facts about an earthworm, such as, there are many known species, and earthworms have a closed circulatory system, and can range in size. Earthworms are helpful when it comes to
Rating:Essay Length: 409 Words / 2 PagesSubmitted: December 17, 2008 -
Wound Vac
Clinical Journal Today, I made rounds with Angela Box, the hospitals certified wound and ostomy nurse. While she also takes care of wounds and ostomies, she also makes rounds for the anthesiologists on their PCA pumps and starts PICC lines. The most interesting thing I saw was a man who had a large abdominal wound and was being treated with a wound vac. He had acquired this wound as a result of and abscess caused
Rating:Essay Length: 1,108 Words / 5 PagesSubmitted: April 4, 2010 -
Written Instructions
The objective of this experiment is to determine the increase in hardness of an engineering material as a function of the amount of cold work (also called strain hardening) imparted onto the material. Cautions: • Do not use your bare fingers to push the specimen through the rolling mill. • Do not use the Rockwell hardness tester until you have received the necessary instructions. Make sure that the bottom of the specimen directly under the
Rating:Essay Length: 524 Words / 3 PagesSubmitted: June 8, 2015