Science Investigation (Chemistry) Rate of Reaction Essay Example

Science Investigation (Chemistry) Rate of Reaction Essay Example Science Investigation (Chemistry) Rate of Reaction Essay Science Investigation (Chemistry) Rate of Reaction Essay Outline: I will investigate the relationship between the rate of a reaction and the amount of catalyst added to the reaction. I will use hydrogen peroxide and speed pu the decomposition of it by adding manganese(IV), MnO2 as catalyst.Fair test:In order to maintain fair test conditions I will control variables that will affect the rate of reaction.The factors that are able to affect the rate of reaction include:* Temperature* Surface Area* Concentration* CatalystSince I am investigating the relationship between rate of reaction and catalysts, the other 3 factors will remain constant throughout the experiment.Temperature: At higher temperatures, the faster moving particles have more kinetic energy. This means they are moving quicker and will collide more often and with more energy, causing an increase in the number of effective collisions.Surface Area: If more surface area is available, the number of particles of the solid reactant available for collision will increase. However, I am d ealing with hydrogen peroxide (liquid) then there isnt a surface area for me to control.Concentration: More concentrated solutions contain more particles in the same space, making them more likely to collide. The increase in the number of collisions with sufficient energy increases the rate of reaction.These explain why I would need to control those factors because they would affect my results dramatically. I will keep them constant:Temperature: room temperature, temperature of hydrogen peroxide (17.C)Surface area: n/aConcentration: 5 volumes (halved the maximum which is 10 volumes, ratio 1:1)However, for room temperature, I will do all experiments in the same room hopefully the temperature remains constant in that one room.Safety:Whilst this experiment is relatively safe, there are still safety considerations that must be adhered to:* Due to the dangerous nature of many of the compounds involved in this experiment, it is important that safety goggles or safety glasses are worn duri ng all tests.* It is equally important to avoid skin contact with the compounds, as some are irritants. This can be done by ensuring that a suitable method is followed precisely so that there are no unexpected events that would lead to skin contact.Accuracy and Reliability:I will take 3 measurements of oxygen produced at each reading I will take. I will then use the arithmetic mean of these measurements in my analysis to calculate average rate of reaction. This should help to minimize unreliable results. Whilst I am doing my experiment, I will note the results down on a table, in order to spot any obvious anomalies.The measurements themselves will be taken as carefully as possible. Time will be measured using the stop-watch (precise to à ¯Ã‚ ¿Ã‚ ½0.1 second), volume of gas produced with the gas syringe (precise to à ¯Ã‚ ¿Ã‚ ½1 cmà ¯Ã‚ ¿Ã‚ ½), the mass of the powdered manganese oxide with measuring balance (precise to à ¯Ã‚ ¿Ã‚ ½0.01g) and the volume of hydrogen peroxide with a m easuring cylinder (precise to à ¯Ã‚ ¿Ã‚ ½0.5ml)Prediction:I predict that the grater the amount of manganese oxide, MnO2, is added to the solution, the greater the rate of reaction decomposition.The formula for this decomposition is:H2O2 (aq) =; 2H2O (l) + O2 (g)Hydrogen peroxide =; Water + OxygenThe manganese dioxide is present to be acted as a catalyst and as with all catalysts would lower the activation energy required in order for this reaction to take place. In doing so, the rate of reaction will be increased. Since more catalyst is present, it means there are more surface area of the catalyst so more molecules will be able to react faster.Method:1. Set up apparatus as shown in the diagram.2. Use a measuring cylinder to measure 20ml of hydrogen peroxide and use another measure cylinder to measure 20ml of distilled water.3. Measure 0.02g of manganese oxide using a measuring scale (remember to put a paper tower on the scale first so that manganese oxide wouldnt be able to direct ly touch the scale, which might cause malfunction to the scale if manganese oxide goes in the internal of the scale)4. Put the manganese oxide into a flask and put the 20ml of distilled water into the flask as well.5. Reset (push the gas syringe back to 0cmà ¯Ã‚ ¿Ã‚ ½ if needed) the gas syringe if needed, and then put the 20ml of hydrogen peroxide into the flask and start the stop watch.6. Observe the gas syringe and take note of the volume of gas (in this case oxygen) produced every 10 sec, 20 sec, 30 sec, 40 sec, 50 sec and 60 sec.7. Repeat step 2-6 for 0.04g, 0.06g, 0.08g and 0.1g of manganese oxide but must clean the flask before using it again.8. After obtaining all of the results, repeat each one 2 more times.Diagram:Pretest:I did a few pretests:0.01g manganese oxide and 10 volume concentration of hydrogen peroxide (20ml):Time (sec)Volume of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)00101520203031404150506060By using 0.01g of manganese oxide, the maximum reached is already 60cmà ¯Ã‚ ¿Ã‚ ½, therefore I thought if I used 0.1g, the limit of the gas syringe (100cmà ¯Ã‚ ¿Ã‚ ½) will be reached with less than 60 sec, so I have decided to try and reduce the concentration and see whether it is a good choice.0.1g manganese oxide and 5 volume concentration of hydrogen peroxide (20ml):Time (sec)Volume of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)00101520313040404950566061Later, I tried using only 10ml of hydrogen peroxide but it wasnt enough for my experiment and it caused a limiting factor very soon in the experiment (when I tested 0.04g of manganese oxide) due to the shortage of hydrogen peroxide molecules for decomposing.The second pretest gave me good range of results to use and it didnt reach the gas syringes limit (100cmà ¯Ã‚ ¿Ã‚ ½) so that wouldnt limit my results. Also, in the result taking, I realized that I would need a lot of time to refill my catalyst and liquids, therefore I have chosen to only do 0.02, 0.04, 0.06, 0.08 and 0.1. This will give me a good range of results to calculate the rate of reaction and also sufficient for supporting my prediction.Obtaining:Here is the tables of results to show the volume of gas produced using different amounts of catalysts. I will also show the average:0.02g catalyst usedAmount of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)Time (sec)Trial 1Trial 2Trial 3AverageAverage Gain in gas produced from previous (cmà ¯Ã‚ ¿Ã‚ ½)00000.000.00104343.673.67207687.003.333010111211.004.004014151514.673.675020192019.675.006023232423.333.670.04g catalyst usedAmount of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)Time (sec)Trial 1Trial 2Trial 3AverageAverage Gain in gas produced from previous (cmà ¯Ã‚ ¿Ã‚ ½)00000.000.00105876.676.672013141313.336.673020191919.336.004029302829.009.675035353635.336.336042414041.005.670.06g catalyst usedAmount of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)Time (sec)Trial 1Trial 2Trial 3AverageAverage Gain in gas produced from previous (cmà ¯Ã‚ ¿Ã‚ ½)00000.000.001010111110.6710.672022212021.0010.333032303331.6710.674040394140.008.335046484646. 676.676051505050.333.670.08g catalyst usedAmount of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)Time (sec)Trial 1Trial 2Trial 3AverageAverage Gain in gas produced from previous (cmà ¯Ã‚ ¿Ã‚ ½)00000.000.001018181617.3317.332031302930.0012.673040414140.6710.674048474546.676.005055545554.678.006062616261.677.000.10g catalyst usedAmount of gas produced (cmà ¯Ã‚ ¿Ã‚ ½)Time (sec)Trial 1Trial 2Trial 3AverageAverage Gain in gas produced from previous (cmà ¯Ã‚ ¿Ã‚ ½)00000.000.001031313331.6731.672045474545.6714.003053525453.007.334060615960.007.005068676767.337.336073727272.335.00I have taken the chance to add in another column (average gain in gas produced from previous reading) to show whether there is a certain pattern.Analysis:My graph clearly shows that as I increase the amount of manganese oxide, I will increase the rate of decomposition of hydrogen peroxide. This supports my prediction fully (prediction: the grater the amount of manganese oxide is added to the solution, the greater the rate of re action decomposition of hydrogen peroxide:H2O2 (aq) = 2H2O (l) + O2 (g))We can clearly see that with the line of best fit drawn the points are not that far away from this line, showing a quite strong relationshipThe rate of the decomposition (when the reaction is at its 20th second) for 0.02g of catalyst used is 0.35cmà ¯Ã‚ ¿Ã‚ ½/sec, for 0.04g it is 0.67cmà ¯Ã‚ ¿Ã‚ ½/sec, for 0.06g it is 1.05cmà ¯Ã‚ ¿Ã‚ ½/sec, for 0.08g it is 1.5cmà ¯Ã‚ ¿Ã‚ ½/sec and for 0.10g it is 2.28cmà ¯Ã‚ ¿Ã‚ ½/sec. This also supports my prediction because the rate of decomposition is increasing when the amount of catalyst increases. I chose to use 20th second into the reaction to calculate the rate because at the 20th second, all the reactions hasnt yet used up or near used up the hydrogen peroxides, therefore not reaching the point where there arent enough, which will cause a slow down in the rate.In theory, the graph should show a steep gradient at the beginning of the decomposition. By looking at th e graph, it does show a steeper gradient at the beginning but not for the line of best fit of 0.02g and 0.04g, this might be because the rate of decomposition is too slow to see any real effect. However, the other 3 lines show a steep gradient in the beginning. The end of the lines (0.06g, 0.08g and 0.10g) all tend to approach a point where it will stop the reaction (can be seen by the curve). The line for 0.10g has the greatest curve. This is because there are most catalyst compared to the others, therefore increases the rate of decomposition the fastest. The manganese oxide has therefore acted as a catalyst and as with all catalysts has lowered the activation energy required in order for this reaction to take place. In doing so the rate of reaction has increased. So the more manganese oxide means lowering the activation energy more effectively. A catalyst basically works like:If without catalyst, the energy for the reaction to take place is relatively high, but if a catalyst is ad ded, the activation energy lowers, therefore enabling the reactants to react with less energy. The activation energy of the reaction is about 75 kJ/mol in the absence of catalyst. The activation energy of the reaction is about 58 kJ/mol if manganese oxide is added to the reaction.However, towards the bottom end of the graph the lines (0.06g, 0.08g, 0.10g) are a lot shallower compared to the start. This shallower lines show that it is finding it hard to produce oxygen at a fast rate because there are not enough molecules left to decompose itself.Some of the results could be wrong, however I can still pull some conclusions from this and one is that we can definitely see that as the amount of manganese oxide increases, the faster oxygen is produced.Evaluation:Overall I think I carried out this investigation to my greatest capabilities.The data that I collected was fairly reliable because of the strong correlation and the accuracy of my experiment was reasonable. It also was enough to s upport my prediction. However, there are some anomalies which might be caused by several errors such as:1. The measuring balance wasnt exactly accurate because sometimes the more I add, the more the mass reading on the balance decreases.2. My reaction time, because even though I try my fastest to obtain the results, I will still be around 0.5 1.5 sec off from the correct time to take the results.There was also a big problem:As soon as the Manganese Dioxide touched the Hydrogen Peroxide, oxygen was produced straightaway. So I lost quite a lot of gas before we put the bung on. I tried to counter this problem by adding the hydrogen peroxide last because liquid is easy to transfer to the flask compared to transferring manganese oxide because the powder might possibly stick to the top of the flask and unable to go down to the hydrogen peroxide. Also, I started the countdown the second the bung was fitted on properly as soon as the oxygen was going up the flask.A major cause for concern on accuracy was the reading of the overall measurement of the oxygen produced but also the measurements of hydrogen peroxide and water used for the experiment. So if these miss-readings were carried out through the whole investigation then my results will be quite a long way out.Looking back on experiment I believe that there are many ways to improve it. One way is the accuracy of the measuring of the catalyst this can be done by requesting a new scale which should not have any chances of any faulty measurements. This would make every measurement of catalyst I take virtually no faults at all.My graph is very basic and one way to improve this will be to increase my range of tests, this will allow me to know where exactly the point where no more oxygen can be created is. Maybe doing until 2 minutes (120 sec) will allow me to locate where it is. I think the timing was as accurate and reliable as it could be, but only a second or third experiment would back that up fully. The equipment we used was reasonable but not the best, but for the conditions we were based in it was the best we were going to get.I could investigate on what type of catalysts is more effective for the speeding up of the decomposition of hydrogen peroxide. Possible catalyst selections include:* Manganese IV oxide (MnO2)* Zinc oxide (ZnO)* Lead IV oxide (PbO2)* Aluminium oxide (Al2O3)* Iron III oxide (Fe2O3)* Copper II oxide (CuO)* Copper III oxide (Cu2O)This might help me understand more about catalyst and what type of metals are best for catalysts, such as: transition metals.I could investigate on the concentration of hydrogen peroxide and keeping the catalyst constant, and also I can investigate on the effects of pH with rates of reaction.

Get a Free JavaScript Download

Get a Free JavaScript Download Unlike other languages that can be used in a web browser, JavaScript doesnt need to be downloaded and installed. Browsers that support JavaScript have it built into the browser, where it is turned on by default (meaning that typically, youll need to change your browser settings only if you dont want the browser to run JavaScript). The only exception is that Internet Explorer also supports vbScript the same way, and the two languages are controlled via settings called active scripting rather than a setting that reference JavaScript specifically. What you will need to download with JavaScript, then, is not the scripting language itself, but rather those scripts that you want to run in your web page (assuming that you have decided not to learn JavaScript so you can write it all yourself). JavaScript Downloads Are Free There is no need to pay for scripts written in JavaScript, because just about any script imaginable is available somewhere as a free JavaScript download. What you need to be careful of, though, is to obtain them from a site that is actually offering the scripts as a free download, rather than just copying the scripts from any site. JavaScript code that performs any significant task will be subject to copyright, so you will permission from the author to use his or her script. The task the JavaScript is doing is not able to be copyrighted, however, so if you are writing a script yourself, you cant get into trouble for looking at an existing script to see how the programmer did it and then writing your own version. But if you are just looking for free JavaScript downloads, then you should go to a site where the author specifically states that his or her script is available as a free download and can be used on your site. There are many sites that offer free JavaScript downloads, including several huge sites that only offer JavaScript downloads, as well as other sites (such as this one) that offer free JavaScript downloads and also have tutorials on how to write the scripts for yourself. Advantages of Getting Free JavaScript Downloads Apart from avoiding copyright issues, there are other advantages to getting your free JavaScript downloads from a site that is actively offering the scripts. The main one is that such sites usually provide step-by-step instructions on how to actually install and use the script. Where you just grab a script from anywhere, not only are you stealing a script but also you wont get instructions on how to install it or support if you cant get it to work. Another thing to watch for when you are getting your free JavaScript downloads from an appropriate site is that many of these sites have been in existence for many years, and the way that JavaScript should be used has changed over time. In many cases, youll find scripts that were written many years ago to work on the most popular browsers available at that time browsers that are now long gone. Ideally, you should have at least some familiarity with what is currently considered the best way of writing JavaScript, so that you can choose the version that will work best with current browsers. You cant really blame the sites offering scripts that are not up to date. It does take time to code and test JavaScripts to make sure that they work correctly with the wide range of browsers in common use today. Having a somewhat dated script that still works available as a free download is certainly better than not having the script available at all. The biggest sites specializing in free JavaScript downloads usually offer scripts written by a lot of different people, and they rely on someone actually writing a new version of a script before they can offer it for download. Other sites that have their own staff to write and test scripts may have limited resources for being able to create updated versions of scripts, and so they may be offering older scripts until they can make updates. Updating Free JavaScripts One thing to remember when you obtain free JavaScripts for your site is that theres no reason to continue running the same version of the script forever. When a more modern version of the script is made available as a free download, you can always update your page and replace the old script with the new one. This is particularly easy where the new version of the script is offered as a direct replacement for the script you are currently using, but it shouldnt be all that hard even if you get it from a completely different source. The number and variety of scripts offered for free download  mean  that no matter what sort of JavaScript you want to add to your page, you should be able to find several sites offering one or more variations on such scripts. Only when you get to the stage where you require a script that directly interacts with custom code within your web page (such as for form field validation) will you be unable to find a free JavaScript download that does everything for you without your having to code any of it yourself. Even in such situations, you should be able to find free downloads that provide you with pieces of code that will do at least a part of what you need, along with instructions on how to attach such code fragments together to do what you require. Even those who move on to writing their own JavaScript rather than relying on pre-written free downloads can make use of free downloads. Along with complete scripts for performing a variety of simple tasks, there are also code libraries available as free downloads that will provide common functionality that will make writing your own JavaScript much easier. For those want to learn  to program, one of the biggest advantages of JavaScript is that it is all free. You dont need to pay for anything to get started.  The JavaScript language  itself is built into all the browsers you need for  testing the scripts, and there are plenty of free JavaScript downloads of complete scripts and libraries that you can either use as is or examine to see how things work in order to write your own code.

Tort Law Essay Example | Topics and Well Written Essays - 1500 words - 1

Tort Law - Essay Example This essay focusess on describing the tort laws, that today can mainly be divided into three huge parts including negligence torts, strict liability torts and intentional torts. The researcher explores the intentional torts in the essay that are offences that are committed by an individual who intends to harm as he commits the act knowing that injury would be the result of his or her act such as an assault. On the other hand, negligence is a type of tort that results unexpectedly. The action is normally not intended to harm while the actor does not know the result of the act. The researcher states that in the negligence act, the action leading to injury is not intended unlike the intentional tort. For example, the trespass of land and negligence are different from nuisance case. For instance, the researcher mentiones that in the nuisance cases actions deal with repetitive injuries while the trespass and negligence actions offer relief even if the injury resulted from one event. In th e second part of the essay, the researcher discusses various compensatory law issues and vicarious liability. There are various goals of compensatory damages that were decribed by the researcher. The main goal of compensatory damages is compensate the personal injury and property damages, that were caused and proved. Vicarious liability mainly is another issue covered in the essay, the issue arises in regard to specific relationships between the defendant and another in the part of defendant to the other party.

Women in Media & Politics Essay Example | Topics and Well Written Essays - 750 words

Women in Media & Politics - Essay Example For the last thirty years feminists have challenged conventional assumptions about the role of women in society. The revived New Right and the women's movement have been struggling to define the terms of the public debate in 'culture wars.' The political agenda has become deeply polarized by issues such as affirmative action, abortion rights, and welfare reform" (Norris 1). When we see world history then we come to know that women have served key positions in the high political offices. In western countries like Britain, USA the attitudes have definitely changed regarding women's leadership positions. In Britain, for example, a woman has held the highest office of Prime Minister as well. These Western countries not only themselves are undergoing change but they are also heavily influencing the lifestyle and work related attitude of women in developing nations. Women became heads of states and political parties in third world countries like India, Pakistan, and Srilanka, Nepal etc. "Nevertheless, women have made great improvements in representation and participation in global politics. Thirty years ago, women in the U.S., for instance, composed less than five percent of all state legislatures; in Senegal, there were no women in the National Assembly; rapists could not be prosecuted in many Latin American countries; women in France could not get a divorc e; females in Cambodia could not vote; and pigs were considered by many male peasants to be worth more than wives in Paraguay. Even though there still are obstacles to women's participation and representation, females have become more involved in politics" (Patterson 14) The changes brought about in the area of politics in particular were gradual and slow. Women had to counter a lot of bias and prejudice when they looked for high offices. Even media and fiction depicted women as subordinates rather than leaders" All these stereotypes and concepts inculcated an inferior and suppressive outlook to women and so their motivation to achieve higher goal were greatly affected. These trends still exist but things have changed and are changing. "When the news media imply that women are anomalies in high public office, the public is likely to regard them as bench warmers rather than as an integral part of government. In Senator Barbara Boxer's phrase, they are frequently depicted as "strangers in the Senate" -- and in the House and the governor's mansion. More women than ever hold high-level government positions, yet they are still portrayed by the media as novelties" (Braden 2). Women today hold prominent positions in media in the fields of journalism, movies, television and print worldwide. There are different prominent names that have contributed positively to not just media but they have also affected women in other fields like politics. Previously, the field of publishing was considered a man's world but today big publishing houses, newspapers and magazines have women holding powerful positions. Janet Robinson runs a company that owns a newspaper, The New York Times Co. that has won 90 Pulitzer Prizes. Stacey Snider of Universal Pictures is another name in the field of movies. While discussing prominent names, we cannot forget the name of Oprah Winfrey who is considered a powerful name in the media business and who has also been socially active. Women like these have become a benchmark for other women who not only

Conservatism and Liberalism Essay Example for Free

Conservatism and Liberalism Essay While there are a multitude of political philosophies in the United States, two have emerged as the dominant and pre-eminent philosophies. They are, of course, liberalism which name derives from liberty and conservatism which derives from conserving the constitution. While there is nothing inherently wrong with either philosophy the minefield of political exclusivity has led to a bitter dispute between both factions that have raged for decades. Many of these disputes are ideological as there are pronounced differences between the two philosophies. In this essay, two major differences will be examined.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   One common difference is that liberalism prefers that a centralized government will guide the economy. Conservatism prefers that the government would play a smaller role in the economy with the hopes that the market will govern itself. In terms of public policy, this has led to a number of battles over regulation vs. deregulation, increased taxes vs. decreased taxes, etc with ach having varying degrees of success at different points in history.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In terms of foreign policy, conservatism has always stressed American exceptionalism whereas liberalism has stressed a more unified one world approach to government. The effect this has had on public policy over the years is evidenced in how often or how little American foreign policy is vetted through the United Nations or under accordance with allies overseas.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Of course, there are many more differences between the two but these two examples illustrate major differences between the two on both domestic and international levels.

Graduation Speech: God Has a Plan for You -- Graduation Speech, Commen

In "Surprised By Joy," C.S. Lewis tells of a mistake that he had observed regarding joy or what he calls "thrills." Lewis realized that what he had first thought to be joy, was actually not joy at all because it began to fade away. He had assumed that he was seeking after the "thrill" itself. He says, "And there lies the deadly error. Only when your whole attention and desire are fixed on something else ... does the 'thrill' arise. It is a by-product. Its very existence presupposes that you desire not it but something other and outer." He realized that when he focused his attention on obtaining the "thrill" of joy, that he was actually focused on himself. True joy is not experienced when one desires joy itself, but when one has his eyes on something else. As believers, the "other and outer" that we have the opportunity to look to is God! God draws us to Himself, our soul responds to Him and in return, He fills our soul with joy. That is portrayed in the words of the Psalmist who says in Psalm 43:3-4, "O send our Your light and Your truth, Let them lead me; Let them bring me t...

Life Span Perspectives Paper

In order to truly understand the life span perspectives we must first define developmental psychology, which is a field that falls under the topic of psychology that is centered on describing how individuals change and grow throughout the stages of their life. This field has also been noted to be one of the more popular fields to be studied. We, as humans, must first grasp the concept that before there can be an outcome there has to be a process or a beginning. We can always trace anything that exists back to a beginning, for people this beginning is birth and the developmental processes that follow are individual pieces of the life processes. Charles Darwin had a longing to understand just what evolution was and exactly how it worked; from this desire he drew the study of lifespan development. Adolescence and norms were first introduced to those in the field of science by way of a G. Stanley Hall publication (Boyd & Bee, 2006). Within this book these scholarly individuals could read about the first observational studies of children. Within this paper you will find the definition of lifespan development, a description of the many characteristics of the lifespan perspective, and the identifying factors of the human developmental domains and periods. Lifespan Development We recognize that within the lifespan there had to be a beginning; we know this because of the work of Charles Darwin. Darwin began the inner workings of human developmental studies and those early evolutionists who shared his opinions were soon to join in his studies. Darwin’s goal was to prove his theory of evolution; it was his belief that his best chance of proving his theory was to engage in intense studies of human development (Boyd & Bee, 2006). According to the American Heritage Dictionary, a lifespan is the average amount of time that an organism, material, or object can be expected to survive or last. If we look for further detail and look for the definition of development, we find that development based on biology is the process of organic growth in an individual organism, we also see that this an be defined as a biological occurrence of events in which an organism changes gradually from a simple to a more complex level (Collins English Dictionary, 2003). When we combine these two individual words we end up with a term that defines the individual changes associated with life progresses that can be tracked in correspondence to the individual’s age. People will change many times over throughout their lifetime; these developme ntal periods are the prenatal period, infancy, childhood, adolescence, and adulthood. In order for one to experience growth developmental change must occur. Life span development will occur over and over, again and again throughout the individual’s life time. Although there are positives and negatives in the developmental process, developmental research and advances will continue to occur throughout an individual’s entire life cycle. Characteristics of the Lifespan Perspective All individuals develop on their own schedule and at their own pace, depending on many internal and external factors. Due to improved nutrition and health and medical knowledge a sharp rise in the average life expectancy has recently been observed. The characteristics of the lifespan perspective are lifelong, multidirectional, plasticity, contextual, multidisciplinary, and multidimensional. One’s development continues throughout their lifespan, there is no certain age that appears to be heavier in this area than others. Continued growth paired with decline affects development which can be said to attribute to the multidirectional portion of the lifespan. Many will seem to focus on the plasticity of the human lifespan, one can see this in the example of a child who has been malnourished, this child may suffer from a diminished intellect but given proper nutrition over an extended period of time the child will, indeed, regain much f the lost function and should eventually catch up to the average for his age. There are many outside forces that have a great effect on human development, these forces can be biological, historical, social, and cultural (Berk, 2007). Lifespan Domain Human Development domains all work together and are affected by one another. The categories of the domains of development are social, physical, and cognitive (Boyd & Bee, 2006). The social domain encases the changes that one may find necessary in order to adapt to a new social environment, or situation, this might include developing and maintaining relationships, and improvement upon general social skills. The physical domain can be defined as the way the humans change their physical appearance. A good example of a physical change is when a child enters puberty, and again as the child becomes elderly. Within this domain it is seen that as the physical appearance changes so will the views that the individual possesses in life. Human Development Periods Psychoanalytic, cognitive, and learning are the three theories that have been shown to produce the most information on human development (Boyd & Bee, 2006). Within these theories we can find information that best explains how one transitions from one moment within their life and essentially evolves to the next level. In discussing human development we must recognize the age old debate of nature versus nurture. Within this theory we must ask which, if either, is truly the strongest influence? Does the environment or genetics play the biggest part in this factor? Conclusion There are many answers that are yet to be discovered in the field of psychology in spite of the fact that there have already been so many discoveries. In the beginning there was Darwin and his theory of evolution†¦.. we do not yet know where the end may take us.

Decontamination and Waste Management Essay

1.1.  Identify different reasons people communicate. A:   People communicate for a variety of reasons. There are several different reasons why people communicate. People communicate each other to: express needs, share ideas, information, to express feelings, to give information and instructions. Read more:  Identify different reasons why people communicate  essay 1.2.  Explain how effective communication affects all aspects of your own work. A:  Effective communication is vital for the social care worker. The service user and the social worker need to understand each other clearly in order for the service user to receive the best possible care. Successful communication involves the social care worker speaking clearly and using phrases and sentences that service users can understand. This also involves the social care worker communicating clearly and openly with other members of staff, the manager and other professionals so as to make sure that the best possible care is provided and that this is done so reliably. 1.3.  Explain why it is important to observe an individual’s reactions when communicating with them. A:  The social care worker should always observe an individual’s reactions to see whether he or she fully understands what you have said to them. If the service user for example looks confused then the social care worker must then adapt their communication and re-phrase the question or statement. In this way communication will be effective. It is also important to observe an individual’s reactions so as to spot anything that may be worrying them or upsetting them; the social care worker will then have to change their approach – this may be noticed through the service user’s change in facial expression or body language. 2.1.  Find out an individual’s communication and language needs, wishes and preferences. A:  Lady A (Dementia): She likes when somebody use simply words, short sentences and not to loud. Lady B (hearing problems): She likes when staff talk to her louder. Lady C (Autism): She likes when we use the same answers for the same questions. 3.1.  Identify barriers to effective communication. A:  Barriers to communication can occur because of speech difficulties due to disabilities or illness for example learning disabilities, dementia, deafness poor eyesight or a stroke. A noisy environment and differences in languages spoken and cultures can also be barriers. 3.4   Identify sources of information and support or services to enable more effective communication. A:  Sources of information and support are immediately available for the social care worker from the supervisor or manager of my care home. There are also specialist services like speech language therapists, translators and interpreters. Further sources could be the internet and the library. 4.1 Explain the term confidentiality. A:  Confidentiality means any information that is held about a particular person is privileged and private. It is the duty of all social care workers to make certain that this information is accessible only to those authorized to have access to it. 4.3 Describe situations where information normally considered to be confidential might need to be passed on. A:  Information about an individual should normally only be shared on a need-to-know basis. All information held within my care home is confidential to the care home as a whole. Other situations where confidential information might need to be passed on is when the individual or someone else is at risk of danger, harm or abuse. 4.4   Explain how and when to seek advice about confidentiality. A:  I would always seek advice from my supervisor or my manager at the earliest opportunity if and when I saw that the information about a service user was being put at risk by the careless behaviour of for example a colleague at work. Depending on the urgency I would either ask them in private in the office or raise this in my supervision.

Cerca and Other Related Spanish Words Indicating Closeness

Cerca and Other Related Spanish Words Indicating Closeness The words and phrase cerca, cercano and cerca de are very commonly used in Spanish to indicate proximity or closeness in location, time, number or degree. Most common is cerca de, which is used as a preposition. Common translations include by, near, about and close to: Cerca de 12 millones de personas sern vacunadas contra la fiebre amarilla. About 12 million people will be vaccinated against yellow fever. Hay muchos hoteles cerca de Disney World. There are many hotels by Disney World. Quiero estar cerca de ti siempre. I want to always be close to you. Los activistas dicen que Cataluà ±a est cerca de la abolicià ³n de la tauromaquia. The activists say Catalonia is close to bringing an end to bullfighting. Despliega Colombia 22 batallones cerca del là ­mite con Venezuela. Colombia is deploying 22 battalions near the border with Venezuela. Hay una buena probabilidad de que veamos una estabilizacià ³n de los precios cerca de febrero o marzo, dijo el presidente. Theres a good chance well see a stabilization of prices around February or March, the president said. Cerca by itself functions as an adverb: El fin del mundo est cerca. The end of the world is near. Hay cuatro tranvà ­as que pasan cerca. There are four streetcars that pass nearby. Tan cerca y a la misma vez tan lejos. So close, and yet so far away. El asteroide pasar tan cerca que podremos verlo. The asteroid will pass so close well be able to see it. El triunfo est cerca. Victory is near. The adjective form is cercano: Tenemos una casa cercana al aeropuerto. We have a house near the airport. Descubre tus cinco amigos ms cercanos en Facebook. Find your five closest friends on Facebook. El futuro (aà ºn no cercano) est en la computacià ³n molecular. The future (but not the near future) is in molecular computing. A few related words have other meanings: The verb cercar typically means to surround or to enclose: Los estudiantes cercaron las oficinas. The students surrounded the offices.The noun la cerca typically refers to a fence or wall. El concepto de la cerca electrificada fue descrita por primera vez por Mark Twain. The concept of an electric fence was described for the first time by Mark Twain.The phrase acerca de usually means about in the sense of concerning: Hablaban acerca de nosotros. They were talking about us.

The Life and Achievements of Albert Einstein

The Life and Achievements of Albert Einstein Legendary scientist Albert Einstein (1879 - 1955) first gained worldwide prominence in 1919 after British astronomers verified predictions of Einsteins general theory of relativity through measurements taken during a total eclipse. Einsteins theories expanded upon  universal laws formulated by physicist Isaac Newton in the late seventeenth century. Before EMC2 Einstein was born in Germany in 1879. Growing up, he enjoyed classical music and played the violin. One story Einstein liked to tell about his childhood was when he came across a magnetic compass. The needles invariable northward swing, guided by an invisible force, profoundly impressed him as a child. The compass convinced him that there had to be something behind things, something deeply hidden. Even as a small boy Einstein was self-sufficient and thoughtful. According to one account, he was a slow talker, often pausing to consider what he would say next. His sister would recount the concentration and perseverance with which he would build houses of cards. Einsteins first job was that of patent clerk. In 1933, he joined the staff of the newly created Institute for Advanced Study in Princeton, New Jersey. He accepted this position for life, and lived there until his death. Einstein is probably familiar to most people for his mathematical equation about the nature of energy,  E MC2. E MC2, Light and Heat The formula  EMC2 is probably the most famous calculation from Einsteins special theory of relativity. The formula basically states that energy (E) equals mass (m) times the speed of light (c) squared (2). In essence, it means mass is just one form of energy. Since the speed of light squared is an enormous number, a small amount of mass can be converted to a phenomenal amount of energy. Or if theres a lot of energy available, some energy can be converted to mass and a new particle can be created. Nuclear reactors, for instance, work because nuclear reactions convert small amounts of mass into large amounts of energy. Einstein wrote a paper based on the  new understanding of the structure of light. He argued that light can act as though it consists of discrete, independent particles of energy similar to particles of a gas. A few years before, Max Plancks work had contained the first suggestion of discrete particles in energy. Einstein went far beyond this though and his revolutionary proposal seemed to contradict the universally accepted theory that light consists of smoothly oscillating electromagnetic waves. Einstein showed that light quanta, as he called the particles of energy, could help to explain phenomena being studied by experimental physicists. For example, he explained how light ejects electrons from metals. While there was a well-known kinetic energy theory that explained heat as an effect of the ceaseless motion of atoms, it was Einstein who proposed a way to put the theory to a new and crucial experimental test. If tiny but visible particles were suspended in a liquid, he argued, the irregular bombardment by the liquids invisible atoms should cause the suspended particles to move in a random jittering pattern. This should be observable through a microscope. If the predicted motion is not seen, the whole kinetic theory would be in grave danger. But such a random dance of microscopic particles had long since been observed. With the motion demonstrated in detail, Einstein had reinforced the kinetic theory and created a powerful new tool for studying the movement of atoms.

Discussion 5 Essay Example | Topics and Well Written Essays - 500 words - 2

Discussion 5 - Essay Example Their lifestyles are the subject of every news and media publication that is known to be saleable and universally appealing. The mentioning of Michael Douglas and Catherine Zeta Jones’ wedding that amounted to â€Å"$1 million to entertain a guest list† (Rothman 192) was an example of this concept. Another relevant term is ‘class consciousness’ which is defined as a general awareness of distinctions in social classes that encompass knowledge on terms such as class awareness, class identification, class solidarity and class action (Rothman 207). As disclosed, the concept of class consciousness ranges from â€Å"the most basic and minimum acknowledgement that there is a hierarch of social classes to participation in overt action to enhance class-based shared interests† (Rothman 207). One strongly believes that class consciousness differs in level and scope of understanding depending also on the stratification of people in society. The information presented under the Quiet Millionaires written by Rothman (193) was likewise interesting and informative in terms of providing greater and significant insights on the lifestyles of a different segment of the rich and famous people, but those who opt to remain private and confidential in their respective endeavors. One of the noted personalities who exemplify this lifestyle was noted as Warren Buffet. As disclosed, â€Å"Warren Buffet, worth over $12 billion dollars, still lives in the same home he bought for $31,500 in 1958† (Rothman 193). The contents are highly indicative that not all rich and famous people lead an extravagant and a life of conspicuous consumption. There are also many who have returned and shared their riches through philanthropic endeavors, such as Bill and Melinda Gates, Michael and Susan Dell, and Ted Turner (Rothman 193) who had been noted to donate large sums of money for various noteworthy