Science
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4,609 Essays on Science. Documents 871 - 900
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Chemistry Practice
Measuring the density using two different methods and deciding which method produces more error Method 1 Table: Method 2 Table and Graph: ________________ First of all the formula for density is mass divided by volume. Thus the gradient of the graph can be seen as the density, as it fits the formula. So the density for the first volume (5cm^3) is 5.02/5, which is 1.004g/cm^3. Conclusion- Method two was logically the one with less error,
Rating:Essay Length: 490 Words / 2 PagesSubmitted: December 2, 2015 -
Chemistry Rate of Reaction
GCSE Science Chemistry Coursework What Affects the Rate of Reaction? In this coursework I will be answering the above question; this will be done from an investigation into an experiment. In this experiment I will conduct various pre-test so I know what component I will use in my main experiment to get the best and fairest results. A reaction is a chemical process that occurs between two elements to produce a bi product like thermal
Rating:Essay Length: 3,051 Words / 13 PagesSubmitted: April 13, 2010 -
Chemistry Sodium Thiosulpahte
Introduction Over the next few weeks I will be doing several attempts of the same experiment that involves the reaction of sodium thiosulphate and hydrochloric acid, I will be closely watching the reaction and how long in takes for the reactants to react. As yet I have not decided which of the several variables I will be changing. I also aim to take results of the reaction down onto a table, which then will
Rating:Essay Length: 502 Words / 3 PagesSubmitted: December 10, 2009 -
Chemistry Study
CHEMISTRY STUDY NOTES: Module 1: The Chemical Earth 1.1 Construct word and balanced formulae equations of chemical reactions as they are encountered. STEPS: 1. General equation 2. Word equation 3. Formula equation 4. Balanced equation 5. Ionic equation Neutralisation: 1. base + acid  salt + water 2. calcium hydroxide (aq) + hydrochloric acid (aq)  calcium chloride + water 3. _____________________________________________________ 4. _____________________________________________________ 5. _____________________________________________________ 1. base + acid  salt + water 2.
Rating:Essay Length: 857 Words / 4 PagesSubmitted: December 28, 2009 -
Chemistry Terms
Elements and Compounds- They are both classified as substances and are found in mixtures. They are different because elements cannot be broken down any further and also because compounds are made of two or more substances while elements consist of only one. Mixtures and compounds- They are both made of two or more substances, and also they both can be broken down further. This is also a difference because compounds can only be separated by
Rating:Essay Length: 586 Words / 3 PagesSubmitted: November 30, 2009 -
Chemistry Vitamin C
tamin C, ascorbic acid, is one of the most important vitamins found in citrus juices, including orange juice. Often projects find that orange juices made from frozen concentrated orange juice (FCOJ) have the highest vitamin C levels as compared to freshly squeezed or not-from-concentrate (NFC) juices. This is probably due to the fact that vitamin C degrades over time in fresh and NFC, but doesn't degrade as much in FCOJ due to it being frozen
Rating:Essay Length: 2,209 Words / 9 PagesSubmitted: February 24, 2010 -
Chemistry Vocab
Chem. Ch. 8 Vocab. 1. chemical equation- a representation, w/ symbols and formulas, of the identities and relative amounts of the reactants and products in a chemical reaction. 2. coefficient- a small whole number that appears in front of a formula in a chemical equation. 3. formula equation- a representation of the reactants and products of a chemical reaction by their symbols or formulas. 4. precipitate- a solid that is produced as a result of
Rating:Essay Length: 283 Words / 2 PagesSubmitted: December 5, 2009 -
Chemisty Project
The aim of this investigation is to find the molar mass of magnesium by making magnesium and hydrochloric acid react and then apply the ideal gas equation. The independent variable of this experiment is the amount used of each substance. However, these were not not be varied. The dependent variable is the amount of hydrogen gas which is formed. The controlled variables are the pressure and temperature in the room, and the width (and thereby
Rating:Essay Length: 416 Words / 2 PagesSubmitted: February 12, 2010 -
Chemosynthesis
Introduction Synthesis is the process of producing a chemical compound usually by the union of simpler chemical compounds. For example, photosynthesis, the word photo means putting together with light. Photosynthesis is the process of converting sunlight into food for organic organisms such as plants. Photosynthesis is the basis of life for planet earth and without it; not only would we not be able to produce the fruits and vegetables that we consume, but the food
Rating:Essay Length: 1,429 Words / 6 PagesSubmitted: April 28, 2010 -
Chemsitry Coursework
Chemistry Coursework An investigation: Reacting magnesium with hydrochloric acid Introduction Experiment equation = Magnesium + Hydrochloric acid Magnesium Chloride + Hydrogen Mg + 2HCl MgCl2 + H2 The aim of the experiment is to investigate how the concentration of hydrochloric acid affects the rate of reaction with magnesium, i.e. how quickly/how much hydrogen is produced. The factors that may affect the rate of reaction are as follows: • Temperature of the Hydrochloric Acid • Catalyst
Rating:Essay Length: 822 Words / 4 PagesSubmitted: December 8, 2009 -
Chi Squares
Chi-Squared Procedure: The formula for calculating chi-square is: χІ = Σ(o - e)І / e That is, chi-squared is the sum of the squared difference between observed (o) and expected (e) data, divided by the expected data in all possible categories. ----------------------------------------------------------------------------- Chi Squared Example The following example consists of asking males and females their most preferred shoe type. Sample data is presented below: The total chi square value for Table 1 is 14.026. *http://www.georgetown.edu/faculty/ballc/webtools/web_chi_tut.html
Rating:Essay Length: 374 Words / 2 PagesSubmitted: November 20, 2009 -
Chicken Hatching
Experiment: Chicken Hatching Background Information Some facts about chickens A chicken is a bird. One of the features that differentiate it from most other birds is that it has a comb and two wattles. The comb is the red appendage atop the head, and the wattles are the two appendages under the chin. These are secondary sexual characteristics and are much more prominent in the male. The comb is the basis of the Latin name
Rating:Essay Length: 1,847 Words / 8 PagesSubmitted: March 15, 2010 -
Child Abuse
Imagine for one moment that you are not yourself any longer. Visualize instead that you are a young girl; old enough to know right from wrong yet still young enough to be terrified by the dark shadows in your room. It is a cool autumn night and your parents have opted to attend a party which you are not allowed at. “It will be fine,? they say. Although you already know what is to come.
Rating:Essay Length: 2,146 Words / 9 PagesSubmitted: December 29, 2009 -
Child Care and Pre School
Who: 3.4 years old Josh, black male, about 15 other children What: Observation of Pre-k When: November 5,2008 7:30 until about 8:35 Where: M.O.L. Child care and Pre school Josh attends a preschool while his parents both work. His parents drop him off at the center at 7:30, and pick him up at 4:00. I started my observation with his arrival, but did not stay for the entire day. Instead, I observed Josh for one
Rating:Essay Length: 1,005 Words / 5 PagesSubmitted: January 16, 2009 -
Childbirth Research Paper
The birth of a child is a pivotal time in the life of a mother and her family. Historically, midwives controlled the majority of births, and involved doctors only when complications arose (Haasch). In the early 1900’s, having a baby at home was the norm, while hospitals provided the medical supplies necessary for illness and surgery only. However, around the 1950’s, hospitals started delivering infants because they believed that they could provide a cleaner and
Rating:Essay Length: 2,523 Words / 11 PagesSubmitted: July 4, 2017 -
Childhood Autism
The purpose of this paper is to identify and gather information on a childhood disorder and a facility that addresses the needs of that specific population afflicted with the disorder. By researching a disorder that the reader (and researcher) knows very little about, it offers an opportunity to gain more in-depth understanding of the biopsychological dimensions of human behavior and the social environment. The disorder chosen for this paper is autism, a spectrum disorder, which
Rating:Essay Length: 1,763 Words / 8 PagesSubmitted: January 10, 2010 -
Childhood Obesity
Childhood Obesity Childhood obesity has become an epidemic over the past ten years in the United States. It is also becoming a national problem. Children all over America are not getting in enough physical activity and aren’t eating healthy for a number of reasons. There are roughly 22 million under the age of 5 years who are overweight around the world. There are many ways to prevent and or help children with obesity and also
Rating:Essay Length: 1,032 Words / 5 PagesSubmitted: November 8, 2009 -
Childhood Obesity: A Growing Epidemic
Childhood Obesity: A Growing Epidemic Matt Vogel University of South Dakota Introduction: Would you like to super-size this meal for an extra $.39? That is a question far too many Americans hear everyday. People in this country are getting fatter and fatter. “In a study conducted by the independent Institute of Medicine (IOM), the prevalence of obese children age 6 to 11 is three times as high as 30 years ago,” (Arnst and Kiley,
Rating:Essay Length: 2,195 Words / 9 PagesSubmitted: January 14, 2010 -
Chimpanzee Behavior
Many scientists believe one of the reasons humans are so successful, is our ability to solve problems. We found ways to keep warm in cold climates. We devised weapons to hunt animals bigger and stronger than ourselves. Do we have an exclusive on innovation? At the Max Flanck institute in Leipzig, Germany, an experiment monitors how quickly apes and children can solves a particular problem. The challenge is to get peanut out of the tube.
Rating:Essay Length: 449 Words / 2 PagesSubmitted: November 16, 2009 -
Chimpanzee's: Better Captive or Free
Chimpanzee’s represent many different things to many different people. They may be revered as sacred symbols or considered pests that steal crops. Some treat them as surrogate children like in zoos, and others use them to further biomedical research to find out a little more about the human body. Increasingly, many fill their cooking pots with primates, while conservationists attempt to preserve remaining populations and their habitat. Many live in captivity and a few percentages
Rating:Essay Length: 1,352 Words / 6 PagesSubmitted: May 2, 2010 -
China Problems
In China, there are many issues that will be addressed in this essay. From Nature Reserves, to over population, to the endangered giant panda. In this essay, I will tell you not only about the problems in China, but I will also let you know what the local government is trying to do to solve these problematic issues. You can pick any region in the entire world and easily pinpoint the problems they are having.
Rating:Essay Length: 1,008 Words / 5 PagesSubmitted: June 11, 2010 -
China Social Economy
Sarbanov Emil (伊米) 2015722024 4.2 Part B (p.122) 1. in this case the limitation on carriers liability 500$ per package specified by COGSA would govern the transaction. And I think considering that this sum (500$ per package) is more than real cost of publication, so Sam, Bill and Howard can be fully protected by carriers liability. Remember that both contracts: with Bill F.O.B. Savannah & with Howard C.I.F. Bath, United Kingdom shall be governed by
Rating:Essay Length: 2,334 Words / 10 PagesSubmitted: December 17, 2015 -
Chinas Response to Overpopulation
Introduction Today so many children and people in the world suffer from poverty and starvation. In so many third world country's families are going without food or good water. Never before have we seen so many children die before the age of five. It is impossible to feed all of these mouths and clothe all of these backs. The world is full of natural resources at our disposal. These resources are taken for granted and
Rating:Essay Length: 1,041 Words / 5 PagesSubmitted: January 8, 2010 -
Chinese
In the beginning, the heavens and earth were still one and all was chaos. The universe was like a big black egg, carrying Pan Gu inside itself. After 18 thousand years Pan Gu woke from a long sleep. He felt suffocated, so he took up a broadax and wielded it with all his might to crack open the egg. The light, clear part of it floated up and formed the heavens, the cold, turbid matter
Rating:Essay Length: 317 Words / 2 PagesSubmitted: May 26, 2010 -
Chinguacousy Park
Chinguacousy Park is located in Brampton, Ontario. This park has everything and is always packed with people. Most of the city’s celebrations take place in Chinguacousy Park since it is considered one of Brampton’s most prominent parks. When I went inside the park, my first expression was “wow”! Everything was so perfect unlike most parks. I started to explore with the fear of getting lost since it was so large (thank God for the signs).
Rating:Essay Length: 564 Words / 3 PagesSubmitted: January 2, 2010 -
Chirality of Ethyl-3-Hydroxybutanoate Generated from a Biological Pathway
Chirality of Ethyl-3-hydroxybutanoate Generated from a Biological Pathway Jake Zimny LaSalle University Philadelphia, PA 19141 Submitted February 10, 2006 Abstract: The reaction being studied is a reduction of a ketone into an alcohol with a chiral center. Because a biological agent, bakers' yeast, is being used to drive this reaction, the optical purity that results in the product is so stereo-selective that the major product, (+), is formed for 89% of the product. Introduction: This
Rating:Essay Length: 882 Words / 4 PagesSubmitted: April 11, 2010 -
Chiropractic Assignment
1. Why did the patient present to the clinic in their first visit? Was the complaint a musculo skeletal problem, a visceral problem or other? The day I went to the clinic was also the patients first visit where she had numerous complaints about pain in her body. These included pain in both her shoulders, her lower back (including the lower thoracic and her upper lumbars), as well as complaining about knee pain in her
Rating:Essay Length: 364 Words / 2 PagesSubmitted: January 24, 2010 -
Chlamydia
Chlamydia Chlamydia is a curable sexually transmitted infection (STI), which is caused by bacteria called Chlamydia Trachomatis. Chlamydia infection is very common among young adults and teenagers. Many people do not know that they have Chlamydia because although they are infected they may not have any symptoms. About 75% of infected women and half of infected men have no symptoms of Chlamydia. This disease can cause serious complications that cause irreversible damage such as damaging
Rating:Essay Length: 997 Words / 4 PagesSubmitted: January 26, 2010 -
Chlamydia
Steve Redding Professor Rayhel Human Sexuality 5/01/01 Chlamydia What is Chlamydia? It is the most common sexually transmitted bacterial infection in the U.S. Its full name is chlamydia trachomatis. It is a kind of bacteria that can infect the penis, vagina, cervix, anus, urethra, or eye. What does chlamydia cause? It causes PID (pelvic inflammatory disease), Sterility, and even death. Some common symptoms include: fever, fatigue, severe lower abdominal pain, lower abdominal tenderness, enlargement of
Rating:Essay Length: 1,339 Words / 6 PagesSubmitted: May 15, 2010 -
Cholera: From the 19th Century to Today
CHOLERA Cholera: From the 19th Century to Today Ellery Signor College Composition II ________________ Abstract After conducting in-depth research on Cholera, the author concluded that public health officials can learn from epidemics in the past to help the people of Haiti who are dealing with Cholera today. This paper analyzes two past epidemics, England and New York. In England, John Snow mapped and tracked the disease. After discovering the source of disease, the Broad Street
Rating:Essay Length: 2,890 Words / 12 PagesSubmitted: August 31, 2018