Science
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4,609 Essays on Science. Documents 2,311 - 2,340
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Investigating How the Relative Molecular Mass Changes in Heat Combustion of an Alcohol:
Investigating How the Relative Molecular Mass Changes in Heat Combustion of an Alcohol Planning Introduction ============ As alcohol burns in air it gives out energy as heat and light. I am going to investigate how the energy output of an alcohol in combustion changes, with increased relative molecular mass, or RMM. RMM is the sum of the atomic masses of every atom in the molecule. Using the alcohols: Methanol, Ethanol, Propan-1-ol, Butan-1-ol and Pentan-1-ol, I
Rating:Essay Length: 1,119 Words / 5 PagesSubmitted: November 18, 2009 -
Investigating into the Effect of Nitrates Levels on the Invertebrate Abundances of Two Contrasting Streams
Investigating into the effect of Nitrates levels on the invertebrate abundances of two contrasting streams. Nitrate Concentration Natural nitrate levels in groundwater are generally low, usually less than 10 mg/l NO3, however concentrations can increase due to human activities, such as agriculture, industry, domestic effluents and emissions from combustion engines. The legal maximum concentration of nitrate for human drinking water in the uk is 50mg/l. Appendix 1 shows the causes of nitrate pollution in groundwater
Rating:Essay Length: 1,944 Words / 8 PagesSubmitted: January 18, 2017 -
Investigating Osmosis
Osmosis is the diffusion of water molecules across a semi-permeable membrane. Diffusion is the movement of molecules from an area of high concentration, to an area of low concentration. So, Osmosis is the movement of water molecules from an area where there are lots of water molecules to an area where there are few water molecules. Our aim is to find the concentration of dissolved substances in the cells of a potato using Osmosis. I
Rating:Essay Length: 616 Words / 3 PagesSubmitted: April 27, 2010 -
Investigating the Effect of Intraspecific Competition on the Growth of Mung Beans
Investigating the effect of intraspecific competition on the growth of mung beans Introduction When plants reproduce, size is highly correlated with reproductive. The struggle for reproductive survival among plants is the struggle to grow in the face of competition from neighbours. So the question this experiment asks is how competition affects the growth of plants. A plant growing in a nutrient-abundant environment free from competition will exhibit maximum growth. One way to address this question
Rating:Essay Length: 1,426 Words / 6 PagesSubmitted: January 7, 2010 -
Investigating the Oral Glucose Tolearnce Test
Investigating the oral glucose tolerance test Aim: To carry out glucose tests on stimulated blood plasma samples if glucose is present in blood plasma. Risk Assessment: Hazardous chemical or microorganism being used or made, or hazardous procedure or equipment. Nature of the hazard(s) Source(s) of information Control measures to reduce the risks Sulphuric acid - Irritant - Very corrosive CLEAPS Wear eye protection & wear lab coat. Try not to spill chemical. Potassium manganate -
Rating:Essay Length: 341 Words / 2 PagesSubmitted: December 13, 2009 -
Investigating the Properties of Lenses
Investigating the Properties of Lenses Introduction: Refraction is the bending of a wave due to a change in media. A lens is a molded optical device with two opposite surfaces, one of which is curved, that bends light so that it converges or diverges to form an image. The focal point of a lens is the point at which the light converges or seems to diverge from when refracted using an optical device. The focal
Rating:Essay Length: 614 Words / 3 PagesSubmitted: December 13, 2009 -
Investigating the Resistance of Wire
Investigating the resistance of a wire. Planning For this investigation there are a number of variables that can be chosen to change or keep the same, these are: · Length of the wire. · Diameter of the wire. · Type of the wire. · Temperature of the wire. Scientific explanation. All electrical conductors resist current through them to some extent. This is resistance and this affects the size of the current flow. The main dependence
Rating:Essay Length: 630 Words / 3 PagesSubmitted: January 7, 2010 -
Investigating the Water Potential of a Potato
Investigating the water potential of a potato Aim Osmosis is the movement of water molecules from a region of high water concentration to a low water concentration through a semi-permeable membrane. Our aim is to investigate the water potential of a potato through osmosis, by finding the difference in weight before and after the potato has been set in a solution of water, sugar or salt. Trial Method Firstly we collected the equipment. This included
Rating:Essay Length: 2,628 Words / 11 PagesSubmitted: February 11, 2010 -
Investigating Which Alcohol Is the Best Fuel
AIM: I am carrying out an investigation to see which alcohol is the best fuel. I will do this by experimenting with different alcohols and setting them alight and measuring different factors. I will analyse all my results and try to discover patterns, which should help me to conclude which alcohol is the best fuel. PLAN ==== This is how my experiment will be set out: ========================================== Keeping this experiment a fair test =================================== There
Rating:Essay Length: 440 Words / 2 PagesSubmitted: November 29, 2009 -
Investigation into Elastic Potential Energy
Why and What I hope to achieve: I believe that the purpose of doing this is to allow me to demonstrate my understanding of Elastic potential energy. And the projectile concepts of the effect of changing potential into kinetic energy and for me to demonstrate my ability to apply elastic potential energy to a scientific investigation. What am I going to do and what will it prove: I am going to use an elastic band
Rating:Essay Length: 839 Words / 4 PagesSubmitted: February 12, 2010 -
Investigation into Temperature Sensors
Investigation Into Temperature Sensors Introduction In this project I will be investigating how it is possible to use a temperature sensor to keep a greenhouse from changing temperature too much. This is intended to help plants live and grow in their optimum temperature. This will create a perfect temperature for the enzymes in the plants to work in, and therefore resulting in a maximum growth/production rate. This could be useful for gardeners who wish to
Rating:Essay Length: 1,714 Words / 7 PagesSubmitted: November 25, 2009 -
Investigation into the Kinetics of the Reaction Between Peroxodisulphate(vi) Ions and Iodide Ions
PLAN Introduction: After having built up knowledge about the kinetics of reactions I decided to do an investigation in this area. I was initially introduced to this particular reaction1 in EP6.4 and then in AA2.1. I was interested in using this reaction as a means of potentially supporting and quantifying some of the theories that I have studied along with also perhaps extending on them. Aim: Using a clock reaction I shall: • Investigate the
Rating:Essay Length: 954 Words / 4 PagesSubmitted: December 17, 2009 -
Investigation of the Behavior of Blowfly Larvae
Introduction The blowfly goes through a complete metabolic change in body form at each stage in their life. - Stage 1 - Egg - Stage 2 - Larvae - Stage 3 - Pupa - Stage 4 - Adult Adult -- Blowflies are a group ranging from 6 to 14 mm in length. The black Blowfly has a dark, olive-green body, black legs, and orange pubescence around the spiracles. All Blowflies have blunt mouthparts and do
Rating:Essay Length: 1,616 Words / 7 PagesSubmitted: February 15, 2010 -
Invisible and Cancer Causing
Invisible and Cancer Causing Every day people walk around not thinking about anything around them. Except for maybe how beautiful it is out side. Yes it might be the perfect day, real bright and sunny, no clouds anywhere in the sky, and about 80BF. But right above you, even though you can’t see it, is an ozone layer. Im going to tell you about some good and bad aspects of so you might be
Rating:Essay Length: 410 Words / 2 PagesSubmitted: February 14, 2010 -
Invitro Fertilization
Everyday, doctors and surgeons encounter ethical issues. With today’s medical technology, couples who are unable to conceive children naturally can use artificial reproductive technology like in vitro fertilization as an alternative. In vitro fertilization is basically making a baby outside of the mother’s body by uniting sperm and egg inside a laboratory. By doing so, natural sexual conception is bypassed (Johnson 2005). When it comes to a procedure as controversial as in vitro fertilization, a
Rating:Essay Length: 1,167 Words / 5 PagesSubmitted: December 20, 2009 -
Ionic Bonding with Polyatomic Ions
Ionic bonding with polyatomic ions Polyatomic ion – two or more atoms, bonded together, which act like one particle with one charge Here are six common polyatomic ions, their formulas, and their charges: - Hydroxide, OH, -1 - Nitrate, NO3, -1 - Carbonate, CO3, -2 - Sulfate, SO4, -2 - Phosphate, PO4, -3 - Ammonium, NH4, +1 (There are many more than this, but these are the most common. Nearly all “polys” are negatively charged.
Rating:Essay Length: 319 Words / 2 PagesSubmitted: January 25, 2016 -
Ironing out Carbon - one Mans Solution to Carbon Sequestration
“Ironing” out Carbon Dioxide Carbon Dioxide plays a key role in the atmosphere. This gas has properties that allow it to sustain and hold in heat, which in turn warms the planet (EIA, 2004). Carbon, the primary component of carbon dioxide; is also the essential molecule for life and is the most basic building block found in all organic compounds. Human activities been blamed for the disruption of the earth’s natural carbon cycles and according
Rating:Essay Length: 2,034 Words / 9 PagesSubmitted: December 21, 2009 -
Irratable Bowl Syndrome
Bo Moore E-Block Irritable Bowel Syndrome Irritable bowel syndrome (usually referred to as IBS) is a disorder of the large intestine that lasts for a long period of time. People who have IBS experience symptoms like constipation or diarrhea. These symptoms can occur one after another. A person can experience constipation at some times and diarrhea at other times. Occurrences of lower bowel irritation may also be accompanied by mild pain, swelling of the stomach
Rating:Essay Length: 554 Words / 3 PagesSubmitted: March 4, 2010 -
Is Alcohol a Dangerous Drug
Contents Is alcohol a dangerous drug------Page 1 Positive impacts of alcohol-------Page 2 How alcohol enters your body---Page 3 Short term effects of alcohol-----Page 4 Long term effects of alcohol-----Page 5 Binge drinking---------------------Page 6 Alcohol addiction------------------Page 7/8 Conclusion--------------------------Page 9 Bibliography------------------------Page 10 How reliable my sources are------Page 11 Alcohol is a dangerous drug, it can affect every organ in the body, is carries risks and can be addictive such as street drugs, but unlike them it is
Rating:Essay Length: 1,083 Words / 5 PagesSubmitted: February 4, 2010 -
Is Animal Cloning Right?
It is a universal feeling of human cloning as taboo; however animal cloning is now an issue. The idea of animal cloning being a good thing is the volume of the number of steaks would increase and be more nutritional. Also, cloning somehow would bring about new vaccines. The intentions of cloning animals are to improve livestock, use parts of pigs for human transplants, and to make drugs. The FDA is also getting involved or
Rating:Essay Length: 769 Words / 4 PagesSubmitted: December 28, 2009 -
Is Animal Research Worth It?
Morality and ethics play a major role in the advancement of medical technology. Is it fair to put an animal through the pain and scrutiny of research? Is it ethically right for a drug that has only been tested on animals to now be tested on a human being that with an entirely different genetic structure? These are a few of the numerous questions being raised about the value of animal research. Answers come in
Rating:Essay Length: 1,677 Words / 7 PagesSubmitted: November 18, 2009 -
Is Ecotourism a Viable Tool Toward Sustainability?
The debate over ecotourism's success as a tool for conservation and development in the developing world is aggravated by the dispute over what exactly ecotourism is. The International Ecotourism Society offers a succinct and often cited definition: “responsible travel to natural areas that conserves the environment and improves the well-being of local people” (TIES). Ecotourism is often tied to the concept of sustainable development. “Sustainable tourism development meets the needs of present tourists and host
Rating:Essay Length: 1,497 Words / 6 PagesSubmitted: April 15, 2010 -
Is Hell Endothermic or Exothermic
First, we need to know how the mass of Hell is changing in time. So we need to know the rate at which souls are moving into Hell and the rate at which they are leaving. I think that we can safely assume that once a soul gets to Hell, it will not leave. Therefore, no souls are leaving. As for how many souls are entering Hell, let's look at the different Religions that exist
Rating:Essay Length: 364 Words / 2 PagesSubmitted: December 19, 2009 -
Is It Cold in Here, or Is It Just Me?
Is It Cold In Here, Or Is It Just Me? There are so many amazing things that make up and control the human body. Did you ever wonder how our bodies maintain a temperature of 98.6? How our blood sugar remains at normal acceptable levels, or how the calcium content in our blood remains stable? These things and many more are maintained as part of a process called homeostasis. Homeostasis is the body’s maintenance
Rating:Essay Length: 714 Words / 3 PagesSubmitted: November 19, 2009 -
Is It Ghosts That Haunt Bly in Henry James’ Novella the Turn of the Screw or Are They Hallucinations Created by the Governess?
Staci Potter ENG 113.3 (X01) Prof. Matlock July 14, 2013 Is It Ghosts That Haunt Bly in Henry James’ Novella The Turn Of The Screw Or Are They Hallucinations Created by The Governess? The Turn Of The Screw, written by Henry James, is a story told by an unnamed narrator about a ghost story she heard told by a man named Douglas. His sister’s governess told this ghost story to him. The story is her
Rating:Essay Length: 1,471 Words / 6 PagesSubmitted: October 30, 2016 -
Is Psychology a Science?
Is Psychology a Science? In order to answer this question it is important to understand the definitions of both psychology and science. The word 'psychology' comes from the Greek 'psyche' (or soul) and 'logos' (or study), which came to be known as the 'study of the soul'. The American Heritage Dictionary defines psychology as: 1. the science dealing with the mind and with mental and emotional processes 2. the science of human and animal behavior.
Rating:Essay Length: 1,542 Words / 7 PagesSubmitted: December 24, 2009 -
Is Science Founded on Uncertainty?
“Science is founded on uncertainty.” -Lewis Thomas Before I can enter this discussion, I must first admit and assume that wrongness exists, but what does wrong mean? If I am “wrong” does it mean that I am almost right, not even close to right, completely incorrect, limited, or just plain off my rocker? Typically, in the world of Science, being wrong isn’t a bad thing. You are still learning and discovering new things by proving
Rating:Essay Length: 457 Words / 2 PagesSubmitted: February 10, 2010 -
Is Stem Cell Research Ethical?
Ethics Behind Stem Cell Research. Is Stem Cell Research ethical? Yes, it is. An embryo which is four or five days old, from which stem cells are derived, is not a human being yet, because it’s brain is nonfunctional and it’s heart is not beating. So destroying it would not be murder, it’s just a beginning of a long process of obtaining stem cells from it. Ronald Reagan, The Ethics Committee of the American Society
Rating:Essay Length: 2,399 Words / 10 PagesSubmitted: April 24, 2010 -
Is Stem Cell Research Right for America?
There are so many benefits from stem cell research. Including but not excluding, cures to a number of diseases, improvements on human life, and more resources in drastic times. I believe that if we spent the time and money needed for this research the improvements on just about everything would be significant. Scientists should be allowed to do stem cell research using human embryos, because it can increase disease survivors, it will use our sources
Rating:Essay Length: 981 Words / 4 PagesSubmitted: December 12, 2009 -
Is the Brain a Computer
INTRODUCTION “These days computer technology is advancing fast and computer developers are coming out with computers that imitate the brain every year. The more computer scientist study the brain to see if thought can be replicated in a machine, the more they get to know about the brain and the more the brain is understood as a mega computer. Before we can investigate whether or not our brain is a computer, it is necessary to
Rating:Essay Length: 1,072 Words / 5 PagesSubmitted: March 5, 2010