Investigating the effects of acid rain in the growth of cress seedlings IntroductionAcid rain is rain or any other form of precipitation‚ which is unusually acidic. It has harmful effects on plants‚ animals and buildings. Acid rain is mostly caused by human emissions of sulphur and nitrogen compounds which react in the atmosphere to produce acids. Acid rain can slow the growth of vulnerable forests and cause leaves and needles to turn brown and fall off. In addition‚ it depletes minerals from the
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In the Future of Life‚ Edward Wilson describes the problems that the Earth is experiencing‚ the causes of them‚ and some of the solutions that can be done to save it. Some problems facing the planet are invasive species‚ overpopulation‚ extinction‚ and killing of biodiversity all have solutions to them. First of all‚ the Earth faces the problem of invasive species which kill the native plants in the population. An example of an invasive species is the giant land snails from Africa were introduced
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Examine the problems some sociologists may face when using experiments in their research. (20 marks) (January 2009) MODEL ANSWER Experiments are the preferred scientific method. There are two main types of experiments. The classic scientific experiment takes place in a laboratory in controlled conditions. By contrast field experiments take place in more natural but less controlled experiments. Although experiments are very successful in science they are rarely used in Sociology for the following
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horrifying medical experiments that took place involving concentration camp prisoners as “test” patients. Not only did these experiments violate the basic rights of human beings‚ but they were an absolute insult to humanity. While this topic is a very uncomfortable‚ and one that makes you question the minds of the people who conducted these experiments‚ it is one that is necessary so that we may become educated and not allow history to repeat itself. Over thirty experiments were conducted on prisoners
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Environmental Variables and their effect on Horseradish Peroxidase Abstract There are several factors that can affect the rate of reaction of peroxidase such as temperature‚ pH‚ concentration of peroxidase present and whether or not it has been boiled. Our experimental data demonstrated that peroxidase activity peaked between 23 degrees Celsius and 32 degrees Celsius. We found the pH to be 7 for optimal activity. As far as the concentration is concerned our results showed that as the concentration
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Investigating the effects of changing temperature on the activity of enzymes Background information: Renin is an enzyme that catalyses the coagulation of milk. It is found in the stomach of many animals and is used in making cheeses and junkets. It is found in the gastric juices or gastric mucosa of many mammals‚ including humans. In the human stomach‚ particularly those of infants‚ rennin works to curdle milk so that pepsin‚ another stomach enzyme‚ can further breakdown the proteins into absorbable
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Jacob Stewart Dr. Wells English 101 20 September 2013 In the 1950’s‚ a series of experiments were performed by psychologist Solomon Asch on the effects peer pressure can have on someone that would otherwise be stalwart in their judgment. In the experiment‚ a group of young men were shown a line with three other lines of various lengths next to it‚ and asked to determine which of three lines matched the length of the first line. There was‚ however‚ a catch: all but one of the men were
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compensation for participating in this experiment. These participants were divided into six groups based on where they were sitting. Design The Stroop Test was used in order to test the effect of interference on reaction time. This was done by using three different types of slides‚ each with either 20 words or 20 colored boxes‚ and recording how many words participants could read the color of‚ rather than the word itself. The colors used in this experiment were red‚ green‚ blue‚ purple and brown
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Professor Philip Zimbardo‚ leader of the Stanford prison experiment considered three questions before initiating one of the most significant experiments to human phycology. He asked; ‘What happens when you put good people in an evil place? Does the situation outside of you come to control your behaviour? Or do the things inside you such as your attitudes‚ your values and your morality etc. allow you to rise above a negative environment? The experiment was intended to last two weeks‚ but was terminated
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prison make the inner demon come out in the prisoner/guard or is the prisoner /guard already wired that way? The Stanford Prison Experiment was a study of the psychological effects of becoming a prisoner or prison guard. This experiment was led by a psychology professor named Philip Zimbardo‚ he had the help of a team of researchers. The purpose of this particular experiment was to induce disorientation‚ depersonalization‚ and DE individualization in the participants. After a period of time behind bars
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