Role Of Colour In Impressionism Essays - Optical Spectrum, Rainbow

Role Of Colour In Impressionism In this essay, I shall try to examine how great a role colour played in the evolution of Impressionism. Impressionism in itself can be seen as a linkage in a long chain of procedures, which led the art to the point it is today. In order to do so, colour in Impressionism needs to be placed within an art-historical context for us to see more clearly the role it has played in the evolution of modern painting. In the late eighteenth century, for example, ancient Greek and Roman examples provided the classical sources in art. At the same time, there was a revolt against the formalism of Neo-Classicism. The accepted style was characterised by appeal to reason and intellect, with a demand for a well-disciplined order and restraint in the work. The decisive Romantic movement emphasized the individuals right in self-expression, in which imagination and emotion were given free reign and stressed colour rather than line; colour can be seen as the expression for emotion, whereas line is the expr ession of rationality. Their style was painterly rather than linear; colour offered a freedom that line denied. Among the Romanticists who had a strong influence on Impressionism were Joseph Mallord William Turner and Eug?ne Delacroix. In Turners works, colour took precedence over the realistic portrayal of form; Delacroix led the way for the Impressionists to use unmixed hues. The transition between Romanticism and Impressionism was provided by a small group of artists who lived and worked at the village of Barbizon. Their naturalistic style was based entirely on their observation and painting of nature in the open air. In their natural landscape subjects, they paid careful attention to the colourful expression of light and atmosphere. For them, colour was as important as composition, and this visual approach, with its appeal to emotion, gradually displaced the more studied and forma, with its appeal to reason. Impressionism grew out of and followed immediately after the Barbizon school. A distinctive feature of the work of the Impressionists was the application of paint in touches of mostly pure colour rather than blended; their pictures appeared more luminous and colourful even than the work of Delacroix, from whom they had learned the technique. To the modern eye, the accepted paintings of the salon artists of the day seem pale and dull. Like the paintings of the Barbizon school, much of their painting was done outdoors, in an attempt to capture the fleeting impression of the play of light at a certain moment. The first Impressionist Exhibition was held in 1874. Prominent among the Impressionists were Claude Monet, Pierre Auguste Renoir, Alfred Sisley, Camille Pissarro, Paul C?zanne, Eug?ne Boudin, and Gustave Caillebotte. Impressionism is thought to be the fruit of the scientific thought and research of the nineteenth century . One of the principles of the movement was that they substituted the natural chiaroscuro of the colour that was based on the solar spectrum for one that was based more on tones of black and white. It was this principle that has affected painting ever since and most profoundly . It was accompanied by the shock of discovering something new, although earlier paintings, such as those of the Barbizon School had been heading towards the same direction. Most people, even today, relate light with the colour white and darkness with black. Painters of the past have used black in an effort to dim a specific colour, and white to order to lighten it. Scientific knowledge has left us with a complete understanding of how the human eye works, and optics has given painters the opportunity to manipulate light more effortlessly. Thus, we have learnt that white light can be resolved into a scale of colours ranging from violet to red, that black is the reversal of the colour due to its ability to absorb all rays of colour, and that pure white and black exist only in theory . Even a surface that appears to be white to us has the slightest tint of yellow, purple or red; likewise, even the dimmest black has tints of colour in it. It was the awareness of all these details that led the Impressionists into excluding black from their

Pablo Neruda Essay

Pablo Neruda Essay Pablo Neruda Essay Sam Halliwell 4/28/14 Sultan English 102 Pablo Neruda and Walt Whitman Pablo Neruda was one of the most influential poets of all time in both the English and Spanish languages. His poetry has inspired many poets of todays age to begin writing. However one must wonder where a man like this was able to find such inspiration. Well that can be traced back to one of the fathers of modern day poetry, Walt Whitman. Whitman played a massive role in Neruda’s poetry and his life outside of poetry. In fact Whitman so heavily influenced Neruda, that he had numerous paintings of him around his house and referenced him his â€Å"father†. This influential figure wasn’t hindered by society and helped sculpt poetry, as we know it. Pablo Neruda was born in Chile, and his real name was Neftali Ricardo Reyes Basoalto. He eventually changed his legal name to Pablo Neruda after the Czech poet, Jan Neruda. Neruda first starting writing poetry when he was a teenager and was actually well recognized at the time. He began writing his first volumes in 1923 titled â€Å"Book of Twilights†. The Next year he published â€Å"Twenty Love poems and a Song of despair†. These collections of poems were highly criticized for there eroticism that was portrayed, but this later became his best-known piece of work. He was seventeen at the time he wrote these collections and it was very controversial because he was so young and the amount of eroticism within the work was astounding to most readers. Now Walt Whitman as well was highly criticized for his use of love poems. He was very well known to be having affairs with men and would oft write about them in his poems. These were also a highly criticized aspect of Whitmanà ¢â‚¬â„¢s poetry, but these views defied the time period and even went on to become some of his greatest works. More specifically his poem â€Å"We Two Boys Together Clinging† was about just that. Writing about his affairs with men of the time was very taboo and unheard of for his time. Many people of his time considered him to be a heretic and mad. Specifically in this poem he talks about â€Å"Miser, menials, priests alarming, air breathing, water drinking, on the turf or the sea-beach dancing, Cities wrenching, ease scorning, statues mocking, feebleness chasing, Fulfilling our foray† (Whitman 9-13) These few lines from that poem, go to show that he doesn’t care what others think such as a â€Å"priest alarming† or â€Å"Cities wrenching† goes to show he doesn’t care if a priest is alarmed by his affairs or what these other people think. It is this freedom of expression during this tumultuous time period that lead Neruda to draw such great inspiration from a man like Whitman. It is this freedom of expression that has lead Neruda to adorn Whitman. Neruda embodies this freedom of expression in most of his works. Especially one of his most famous works â€Å"Twenty Love Poems and a Song of Despair† as I stated earlier, these were especially controversial and unconventional poems that Neruda chose to share, that were unlike anything people in South America and North America had seen before. Whitman was much the same during his time, showcasing works that were well ahead of his time and also reflected his unorthodox lifestyle. Whitman’s works â€Å"Leaves of Grass† was the equivalent of Neruda’s most famous collection. His poetry collections were considered obscene by many for there overt sexuality that it displayed. However this just showcased how far ahead of his time and open minded Whitman was. Neruda sculpted his poems around Whitman’s freedom of expression. In fact Neruda owned dozens of copies of â€Å"Leaves of Grass † buying copies whenever he could, no matter what the quality or price, because it had such a bearing on his work. Neruda in fact considered Whitman as â€Å"the poet who opened the door for American poetry† (Rumeau) Neruda specifically focuses on â€Å"Whitman’s vital lesson† (Neruda), which was his acceptance and embrace of the entire world. This was Whitman’s idea of diffusing

Bpo And Cloud Computing Contract Structure

Bpo And Cloud Computing Contract Structure There will be provision of a well-defined scope that includes proper identification of each proposed process. The contract should have a defined timeframe for how long the contract will be in effect, acknowledgment of project risks and how much it can run the company, whether there is flexibility in the budget and will we be guided by the scope or budget. With all these factors being addressed, the pricing structure most suitable for the proposed processes is the Unit-cost contract. This type of pricing structure will allow the vendor to charge us per unit, but it may be the better type as the company is steadily growing and cannot define the quantity of data we are seeking to store throughout the life of the contract. The quantity may vary and so will the total cost. Evaluation Criteria In an effort to select the company that best satisfies what we are looking for to fulfill our scope, here is a list of areas that we going to need to evaluate of the proposed vendors. This combination of criteria will prove which company is most suitable based on their evaluation. Understand the scope of work – the vendor needs to fully understand what it is we are looking for. We will provide a well-defined scope and we expect that the vendor can deliver what we ask for. Overall cost or financial proposal – since one of the company’s main reason to outsource is so that we can curb the expenses associated with doing it ourselves, the provision of a practical and transparent financial proposal is very important. Technical capability – the vendor will have the responsibility of providing strong the highly required strong technical support associated with data centers. Reputation/Experience/References – A company’s reputation is one of their strongest attributes. After we do our due diligence, we will determine that the vendor’s record can uphold to what we are seeking. Production capacity – Productivity along with efficiency is the key. The vendor should be able to produce a quality service. Business size and type – We need to analyze the business size and type to also ensure that they are qualified to carry our data weight. Timeline Select outsourcing team and manager. Identify main reason for outsourcing. Establish outsourcing objectives and service requirements. Develop request for proposal. Review proposals and conduct evaluation. Define scope and pricing/contract structure. Start and execute bidding process (amongst those considered). Select preferred vendor. Develop negotiation strategy. Thorough vendor due diligence. Produce Terms and conditions. Negotiate terms and conditions. Agree to terms and conditions. Administer contracts. Sign contracts. Correlation with COs and material There is a strong correlation with Cos and material. A strong correlation indicates how likely something is to happen a strong correlation means something is very likely to happen, or the occurrence of two things are greatly related.

Answer one simple guiding questions sheet Essay Example | Topics and Well Written Essays - 250 words

Answer one simple guiding questions sheet - Essay Example ch is different from the political approach in the sense that it is more contextual and identifies a broad system in this issue rather than blaming the proximate and local forces ( as in the case the political approach). The apolitical approach is not devoid of a political stance since acknowledges the effects of human activities on a natural wildlife setting but denies their isolation from it as they are regarded part of the biodiversity Ecoscarcty account shows that a crisis due to scarcity of natural resources in the human-environment-relationship affects the whole biodiversity system and this means there is clever use of substitutes and new technologies and techniques are put in place to increase efficiency thus more alternative ways of sustaining the growing population. This results to infinite resource production bringing an ecological balance in the whole system. The Modernization account shows how modern technologies can guide natural resource management; exploitation and conservation through taming resource degradation and environmental destruction. The two accounts are apolitical since they view the human-environment relation as being interdependent. The political Ecology as a hatchet prunes away methods, stories and policies that create pernicious environmental and social outcomes. It is also an hatchet to stories and myths that seek to explain the influence of the accounts on political and ecological change.( Davis, 2007,p.10).On the other hand the political ecology as a seed is progressive and not retrospective and reactive since does local knowledge documentation and seeks to recover disappearing knowledge and practices and how they became part of the alternative development strategies. The first thesis is the Degradation and Marginalization shows how overexploitation on local production systems can lead to poverty and this can occur in a cyclic manner leading to a sustainable community management and a decrease in the equity of resource

U.S. law-making and implementation Essay Example | Topics and Well Written Essays - 1000 words

U.S. law-making and implementation - Essay Example However, the process of law making is not as easy as it appears since it involves lengthy processes, as well as political involvement, which makes law making and implementation very complex. Law making starts with only one member making a proposal based on legislation idea from outside or inside the congress. Members of the congress receive drafts from academics, the state legislature, interest groups, executive branch departments, the president, and the federal agencies. When members like the concept that is in the draft, they will introduce it as their own idea or they can distance themselves from it and introduce it by request. This means that they introduce the bill just because of professional courtesy and not because they embrace the ideas in the proposal. A legislative proposal made by the president is given advance publicity or he announces it formally when giving a speech in a state of the union or when giving a press conference. An example is president Obama’s proposal on Gun control and the 2010 act on healthcare. However, a proposal emanating from the president does not have privileges of passing into a law automatically; it must pass through the proc ess as any other bill. Politics from both sides of the government have a great influence on the passing of a bill. Although, for the case of the president, he can rely on his party for support, there is still a great challenge because the other party might fail to support the bill (U.S. G.P.O. 3). Furthermore, the checks and balances of American traditional law making process limit the president’s powers by not allowing him to pass his own legal proposal into law without hustle. Hence, for the bill to pass, he must lobby ferociously just as the other legislative advocates do to protect and respect the independence of the American legislature from the executives. For instance, the legislative proposal on gun control by

Childcare Center Director Essay Example for Free

Childcare Center Director Essay Do you enjoy working with children? Is a question that I like to think of when it comes to working in the field dealing with the responsibilities of taking care of children. Today, there are more needs for children to be taking care of and learning about why it is so important to have a good education. I can remember when I was about ten or eleven years old, I use to babysit children during the summer, I would teach them their ABC’s, how to count, and recognize numbers, shapes, sizes, and their colors. Being a Childcare Center Director is my dream career, because I wanted to ensure that my children will be taught and learn why it is so important in having a good education. I will not only have a Childcare Center to sit and watch children just to earn an income, I want to ensure the parents that my Center will benefit their child or children that this is an educational center as well. Today, Childcare Directors are among one of the highest paying job in the United States, according to the http://www.bls.gov/ooh/management/preschool-childcare-centers-directors.htm (visited December 19, 2012). Childcare Directors are expected to grow by eight percent between the years of 2008-2018. A Preschool and Childcare Center Directors is an institution of early childhood education for children between the ages of three-to-five year old. Directing a Preschool/Childcare Center is exhausting and can also be complicated at times when you have a problem that involves the matter with a parent and one of your employees. It is your responsibility to make that your staff understands the responsibility in handle and dealing with problems that have occurred. It is a dedicated job, but you must have the desire love and work with children’s. What do they do as a Director? Is one of many question people tends to ask and wonder about. Being a Childcare Director is not just a job sitting behind a desk, they have many responsibilities to tend to such as, providing a clean, safe and educational environment. For example, they have to hire and training staffs, communicate with the parents, employee and children’s on a day-to-day base. But the most important of their job is to ensure that the staff is well trained and that they are well qualified to meet and follow the center’s rules and guidelines. They have to make sure that they comply with the state and federal laws. To be a Childcare Director they also must meet certain requirements that are set among the state laws, depending on the location and state that you desire to work in. According to the Texas Department of Family and Protective Services (www.dfps.state.tx.us) , that anyone serving as an administrator of a Childcare Center in Texas must hold a Childcare Administration License. Depending on the location or state, you have different requirements and standards to meet. The Directors are required to have at least a Bachelor’s Degree, some even required to have Master’s Degree. Being a Childcare Director you have the opportunity to earn a certification but you are not required to have one. According to the Bureau of Labor (www.bls.gov) the highest paying states in Childcare Center Director are District of Columbia, Massachusetts, New York, California, and Alaska. Comparing to others daycare positions a Daycare Directors have the highest wages, they have almost 20,000 more per year than just been a Daycare Center employee. You can at least expect to gross out between $39,000 to almost 43,000 a year, in which that means you making between $20.00 to $22.00 an hour. Since Childcare Directors have the responsibility of the financial management of the centers, with their salaries this means that they will be able to develop a budget, manage the accounting and over sees accounts, payable and receivable. Being a Childcare Directors plays a major role in the world today. As you can see working as a Childcare Director is not just a sit down or working behind a desk job, you have to be active, ensuring parents that your center is not only a Childcare center, but a center to where their child will be taught and learn the basic of what it will take for them to have a better education. You are the sole owner and responsible for whatever goes on in your facility under your care, rather it is setting up meetings, dealing with the parents or seeing about the children. You are responsible from the time your doors are open until closing. So as you can see that why I love to work with children, because I want to make sure that once they leave my daycare, they can have something to look forward the next and to their future. References Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2012-13 Edition, Human Resources Managers, on the Internet at http://www.bls.gov/ooh/management/human-resources-managers.htm (visited December 19, 2012). Preschool and Childcare Center Directors [pic]. Bureau of Labor Statistics, U.S. Department of Labor. Occupational Outlook Handbook, 2012-13 Edition. Preshcool directer: Job description and requirements. (2003-2012). Retrieved from http://education-portal.com/articles Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2012-13 Edition, the Internet at http://www.bls.gov/ooh/management/preschool-childcare-centers-directors.htm (visited December 19, 2012). http://educationportal.com/articles/Preschool_Director_Job_Description_and_Requirements.html © copyright 2003- 2012 Education-Portal.com. All other trademarks and copyrights are the property of their respective owners. All rights reserved. [pic] http://www.onetonline.org/link/summary/11-9031.00#menu

The Scaffold Scenes in Nathaniel Hawthornes The Scarlet Letter Essay

The Scaffold Scenes in Nathaniel Hawthorne's The Scarlet Letter In Nathaniel Hawthorne?s The Scarlet Letter, the Puritans constantly look down upon sinners like Hester Prynne, both literally and symbolically. The use of the three scaffold scenes throughout the course of the novel proved to be an effective method in proving this theory and showing how Puritan society differs from that of today?s. In the first scaffold scene, Hester is being led from the prison where she has spent the last few months, towards the scaffold clutching her newborn baby to her bosom, covering the scarlet letter-the two symbols representing truth and her lost innocence. She stands on the scaffold, with the magistrates and ministers standing above her on the pulpit, symbolizing that they will always be closer to God than she will ever be, however, the reader is unaware that Hester?s minister, Arthur Dimmesdale, who also stands above her on the pulpit, which is a bit of dramatic irony, considering the fact that he is the father of the infant, and her accomplice in her sin. Also during this scene, the man the reader comes to know as Roger Chillingworth hides in the shadows, looking up at Hester, the evil already swelling within him, blackening his soul. The events leading up to the next scaffold scene, some years later, are some of the most significant scenes in the entire novel. The treatment of Dimmesdale by Chillingworth, who Dimmesdale had taken in as his physician, plays a key role, due to the fact that Chillingworth?s intentions are less than pure. Chillingworth is bent on revenge, and is willing to do anything necessary, even destroy another man?s life in order to soothe the savage beast within. However, deep inside Chillingworth?s... ...t and withdrawn, as if all the life and faith he had in the world had been drained out of him. It is in this scene that Dimmesdale finally recognizes Hester and Pearl publicly, he takes them up upon the scaffold with him, and announces to the world what he has done, and through this he feels that he has suffered enough and that his conscience is clear, and with this he dies and goes to Heaven, a soul that has been forgiven, leaving Hester and Pearl alone once again with their grief, and their sin. These three scaffold scenes display the rise of conflict, the climax, and the conclusion. All three tie together to show a common theme, truth. The scaffold and those who stood upon it stood for truth, while those above them judged and those below gawked. It serves as an important symbol throughout the novel setting apart the sinners and those who would judge them.

Why the Maglev (Magnetic Levitation) Train

Levitating Trains The Maglev trains â€Å"A train is a connected series of rail vehicles propelled along a track to transport cargo or passengers. † -Wikipedia Trains now days are most commonly used for the transport of passengers across long distances, they are fast enough to reach a constant speed between 65 km/h to around 120km/h, although the record speed of a conventional train is of 575 km/h, held by the French TGV. It needed some modifications (shorter and higher voltage) and had passengers in it.Although, the record for non-conventional train is held by the JR-Maglev, a Japanese experimental train reaching the 581km/h without passengers (precaution) on a Magnetic-Levitation track. Answering how a train works is a very hard question, assuming we are talking about locomotives; they all have a generator behind the crews cab about half the size of a Volkswagen Beetle that powers the train with electricity by spinning, but the electrical output requires a lot of energy, tha t’s why there is a huge and powerful diesel engine that provides this power.Ignoring what the possible price of putting down a rail could be, I am going to calculate the price of having to get wheels and how long they last. A single axle 2 wheels costs $33, on the average commercial train there is about 636 wheels, so there is 318 axles, which adds up to total of $10,494 . There isn’t an exact schedule on how often they change train wheels, it all depends on the rail and how much braking the train does, for example, if it’s a very curvy â€Å"road†, more braking is applied and the more the wheels get wasted, and eventually, this slows down the entire vehicle.Regular trains also suffer from bumps and weather can play a difference in the performance of the train, the fact that the train is connected to the rail and to the floor deteriorates the materials and can make a huge sound, and if it’s a train that goes by a big town, there might be noise comp laints. Since friction seems to be the root of all problems, why not remove it? Friction is a natural force that occurs when an object or more encounter moving over each other or two objects rubbing against each other. How can a train overcome this?If only it could levitate†¦ well, needless to say, as I have mentioned a few paragraphs back, there is such a train, one that levitates with magnetism, the Maglev train, which by the name might sound Russian, but the mastermind behind it is Alfred Zehden (German), although he gave it a name in English: Maglev (MAGnetic LEVitation). The train levitates with electromagnetic (the interaction of electric currents with magnetic fields) C-shaped arms, with the top part of the arms connected to the train and the inside part holding the magnets, so the rail is situated in the space within the C.Since friction was the factor that was creating the problem, now that there is a clear (15mm) space between the rail and the train â€Å"wheels† there is no friction involved, so now the train speeds up faster to its average speed of 430km/h and it also slows down easier without any sound, and it goes unaffected by non-extreme weather, if the town has a power there is no problem because it has its own generator and also let’s not forget it is super cool because it is a LEVITATING TRAIN!Another feature it has is that regular locomotives can only run at a minimum speed of about 30km/h, with electromagnets there is no such problem, the train can cruise around at whatever it’s chosen speed is. The price of a regular (and might I add, boring) locomotive is around $2,300,000 with an added $35,000 for fuel and repairs, whereas the maglev has a more expensive staring price of 1. 2 billion, although it is expected for the price to fall to 1,800,000 in the next 30 years.In the long run and in this case a very long run because trains are one of the vehicles that last the longest, the maglev is more profitable than regu lar locomotives Cultural: As far as I am aware, culturally there shouldn’t be any problem with the maglev unless there is some cult out there that I’m not aware of that hate electromagnetism. Political: If anything, on the long run the government profit from this investment, considering it’s the fastest commercial train in the world, it gets a lot of attention. On the other hand, only 4 countries have patented the idea and of those only 2 (Aichi, Japan and Shanghai, China) have constructed the rains and 2 other under construction in Seoul, South Korea and a second one in China, which leads to think that other governments are afraid of bringing these ideas to their country and then end up being an absolute failure. Environmental: The maglev train actually does benefit the environment since there is less friction and therefore less fuel is used, and also less resources to replace train and rail parts since they won’t deteriorate because there is no friction involved. Social: Everyone is going to want to ride the super cool levitating train because it’s a SUPER COOL LEVITATING TRAIN!In conclusion, I think I have stated my point very clearly and we have solved the friction problem thanks to our friend electromagnetism. -August Paloluoma P. S please ignore Social, I still don’t know why I wrote that down†¦ Bibliography: URL: http://en. wikipedia. org/wiki/Maglev#Technology Title: Maglev Latest date modified (LDM): 3 November 2012 at 18:01. URL: http://en. wikipedia. org/wiki/Shanghai_Maglev_Train Title: Shanghai Maglev train LDM: 31 October 2012 at 14:51. URL: http://science. howstuffworks. com/transport/engines/maglev-train. htm Title: How the Maglev train works LDM: 26 January 2012

Piaget and Vygotsky Essay

In this Essay I will compare and contrast the theories of Piaget and Vygotsky. They both were influential in forming a more scientific approach to analyzing the cognitive processes of the child active construction of knowledge. They both developed their own ideas of child development and they believed cognitive development in children took place in stages. However they were distinguished by different styles of thinking. Piaget thought that children actively construct their own cognitive worlds and they adapt their thinking to include new ideas because additional information furthers understanding. He stressed that to make sense of our world we organize our Schemata or experiences. We connect one idea to another. We also adopt new ideas. Adaptation is by assimilation, which occurs when individuals incorporate new information into their existing knowledge into an existing pattern of behavior of schemata (example). Piaget refers to Schemata or schemas to the way we organize our knowledge. We can think our knowledge as units and each of them related to aspects of the world including actions, objects etc. (referencing ) Accommodation occurs when individuals adjust to new information. Piaget thought that equilibrium occurs when is a balance between assimilation and accommodation. He believed equilibrium schema is both the category of knowledge as well as the process of acquiring that knowledge. As experiences happen and new information is presented, new schemas are developed and old schemas are changed or modified. An example is, say a child sees a crow and a pigeon in the sky, and is told that they are birds. The child then forms a bird schema defined as â€Å"something that flies†. The next day, he goes out and sees a seagull, which easily fits into his existing bird schema. This is called assimilation, when we take new experiences/knowledge and put them in our existing schemas (or categories). The next day, a child goes out and sees a plane in the sky. Whilst this fits the definition of â€Å"something that flies†, it seems to be quite different than the other birds he has seen, and he is told that this is not a bird. To explain this, the child forms one large category of ‘flying things’, with two sub-categories; birds and planes. This process is called accommodation, where we change our existing knowledge structures to account for new information that doesn’t fit. Piaget also believed that we go thought four stages in understanding the world. Each stage is aged related and consist of a distinct way of thinking, a different way of understanding the world. This theory is known as Piaget’s Stage Theory because it deals with four stages of development, which are sensorimotor, preoperational, concrete operational and formal operational. ( referencing ) On the other hand, Vygotsky believed that children actively construct their knowledge. He gave social interaction and culture far more important roles in cognitive development than Piaget did. Vygotsky socio cultural cognitive theory emphasizes how cultural and social interactions guide cognitive development. He portrayed the child development as inseparable from social and cultural activities. Vygotsky argued, â€Å"learning is a necessary and universal aspect of the process of developing culturally organized, specifically human psychological function† (1978, p. 90). In other words, social learning tends to precede development. He believed that the development of memory, attention and reasoning involves learning to use the inventions of society, such as language, mathematical systems and memory strategies.( referencing) Piaget believed that development had to come before learning; Vygotsky believed that development and learning worked together though socialization and language. Vygotsky gave language a huge role in development. For vygotsky Language plays two critical roles in cognitive development. First language is the main means by which adults transmit information to children. Secondly, Language itself it is a very powerful tool of intellectual adaptation. Vygotsky believed that language develops from social interactions, for communication purposes. Later language ability becomes internalized as thought and â€Å"inner speech†. Thought is the result of language. Piaget thought that there was a connection between biological and cognitive development. Vygotsky believed that knowledge from social interactions spurred cognitive growth and development. Even they had really big differences; they both believed that social interactions played an irreplaceable role in cognitive development. Piaget thought that cognitive development is influenced by social transmission (learning from others). Vygotsky believed that social interactions were an instrument in development and that it heavily influenced thoughts and language. Piaget strongly considered that the developmental ages of students determined where they should be in the learning process. Vygotsky took that idea further by comparing the learner’s actual development to their potential development. He called this area of â€Å" zone of proximal development. ZPD is the range of tasks that one cannot yet perform independently, but can accomplish with the help of a more competent individual. For example, a child might not be able to walk across a balance beam on her own, but she can do so while holding her mother’s hand. Since children are always learning new things, the ZPD changes as new skills are acquired. Piaget stages are hierarchical. Each of Piaget’s stages must be complete before moving to the next one. Vygotsky’s theory does not depend on time. Piaget stages imply that children cognitively develop on their own, without the help of someone or something. Vygotsky concentrates more on social interactions and aide given to a child when develops. Vygotsky Scaffolding is the kind of help, assistance and support that enables a child to do a task which they cannot quite manage yet alone and which it will help them in the future to be able to make that task or similar on their own. For example: In a school laboratory science class, a teacher might provide scaffolding by first giving students detailed guides to carrying out experiments, then giving them brief outlines that they might use to structure experiments, and finally asking them to set up experiments entirely on their own. ‘What the child can do with assistance today she will be able to do by herself tomorrow’ (Vygotsky, 1978, p.87). Both these educators contributed to the present day ideas of constructivist learning. Both offer some incredible insight into possible ways children learn and byusing there theories it is possible to create a more conductive learning environment for the child.

Experimental Design Questions in ACT Science

Experimental Design Questions in ACT Science SAT / ACT Prep Online Guides and Tips Every day you have a plan: whether it’s going to school or the movies. You make plans if you don’t already have a plan.Scientists / Researchers are major planners and control-freaks (get it science nerds?). The ACT Science section asks you to figure out what that plan was and how it could hypothetically change.These two types of questions are typically found in Research Summaries Passages. To learn more about this type of passage and learn useful ACT Science tips, check out the 3 types of ACT Science passages. In this article, I'll cover: The Two Types of Studies Independent and Dependent Variables Comparing and Contrasting Experiments Questions Questions about: Why did the Scientist/Student do X? Questions about hypothetical changes to the experiment Throughout the article, I'll dive into real ACT Science practice questions and provide ACT Science strategies along the way. The Two Types of Studies Observational vs. Experimental In Observational studies, scientists simply collect data and study differences.For example, there is an ACT Science passage about measuring the beak depths of finches from different neighboring islands. In Experimental studies, scientists create an experiment where they choose to change certain variables and see how the result changes in response.For example, there is an ACT Science article about giving tadpoles varying amounts of a certain chemical and seeing how it affects their transformation into frogs. Man, I'd hate to be a tadpole under his microscope. In both Observational and Experimental studies, scientists are looking for the differences between different conditions.It's not that meaningful to just provide a single data point - for example, "finches on Island A had an average beak depth of 8 mm."OK, great - what does this mean? Is 8 mm large or small? -Without comparisons, it's hard to know the importance or meaning of a study. Scientists do compare apples and oranges. Therefore, scientists will take multiple data points in different scenarios, and then the scientists compare them.The ACT Science passage on finches shows that "finches on Island A have an average beak depth of 8 mm while finches from Island B have an average beak depth of 9 mm."Now, we can compare the two.Island B finches have a larger average beak depth than Island A finches. This is also where study design differs - scientists will study different aspects of the same general field to find different answers.In an ACT science passage, you'll typically see multiple experiments and studies within a single passage (Particularly in Research Summaries and Data Representation Passages - again for more information about the 3 types of passages in the act science section click here).They will be labeled Experiment 1 / 2 / 3 or Study 1 / 2 / 3.Each experiment or study will be related to each other, but different in major ways.The experiments may measure the same change but use different independent variables, which we will discuss next: Independent and Dependent Variables In experiments, scientists are often changing experimental variables and seeing how the response changes.The variables that the scientists actively change are the independent variables.The variables that they then observe are the dependent variables.Here's an example: Scientist 1 is running an experiment to see how fast a rubber ball rolls down an incline.For each trial of the experiment, Scientist 1 uses different inclines of specific angles.Scientist 1 tested an incline of 10, 25, and 50 degrees. The scientist then timed how fast it took for the ball to roll from the top to the bottom of the incline.What do you think are the independent and dependent variables here? The independent variable is what the scientist is controlling. In this case, Scientist 1 is controlling the degree of the incline.The dependent variableis what the scientist is observing.In this case, Scientist 1 is observing how fast the ball rolls down the incline.It is as simple as that! Scientists might conduct experiments with more complicated scenarios like circuits or heat transfers, but the concept is the same. ACT Science Tip #1: data points are often graphed on an XY-graph, and independent variables are usually on the x-axis and dependent variables on the y-axis. ACT Science Tip #2: in observational studies, researchers don't have independent and dependent variables, as they don't really control what they are studying - they're just observing.But don't worry - the ACT won't ask you to make this distinction; this note is just to improve your understanding of how experiments work.Let’s attempt one of the ACT Science practice questions that asks us about the experimental variables: Let’s start by figuring out what the question is asking us: in Experiment 2, which chemical was the titrant and which was the sample solution? Idon’t know what titrant and sample solution mean. We need to start by figuring out what titrant and sample solution mean in the context of the experiment. ACT Science Tip #3: my recommended ACT Science strategies begin with using the visuals to try to answer all ACT Science questions. However, you could not figure this out by looking at the visual, so you needed to skim.Starting with Experiment 2, since that is what the question is asking about, we skim this, This is helpful because it tells us acetic acid is one of the solutions in Experiment 2 instead of HCl, but it doesn’t tell us whether it was the titrant or sample solution.However, even without knowing which it is, because acetic acid is only mentioned in answer choices A and C, we can eliminate choices B and D.We also learned that HCl was not used because it says acetic acid was used instead, but this doesn’t help us yet. Since HCl is not used in answer choice A or C.To figure out whether acetic acid is the titrant or sample solution, we must skim the rest of the passage.In the introduction, it had this helpful tidbit: We now know that titrant means the added solution andsample solution is the solution to which the titrant is added.Now, let’s skim Experiment 1 for more information because we still don’t know the answer. So, in the original experiment, Experiment 1, NaOH solution was added to HCl solution.According to what we just skimmed and the introduction, this would mean that NaOH is the titrant since it is being added.HCl is the sample solution since the NaOH is being added to it.This is very helpful! We know that in Experiment 2 the same procedure was repeated only using acetic acid instead of HCl. NaOH remains the titrant, and acetic acid replaces HCl as the sample solution.Therefore, the answer is C. ACT Science Tips / Strategies for Variable Questions: When trying to answer questions about experimental variables, start by dissecting the question. Ask yourself is it asking about the independent or dependent variable or both? Which experiment/study is it referring to? Next, look at the corresponding visuals for help answering the question. If you need more information, skim the passage, start by skimming the experiment or study that the question asks about. Skim the rest of the passage if you still haven’t found what you are looking for. Use process of elimination to help you narrow your focus. Do not be tricked by hidden information. This question was very tricky because it required you to look at Experiment 1 and the introduction to find out information about Experiment 2. Know that the answer to Experimental Design questions will always be buried within the passage. So keep digging! Comparing and Contrasting Experiments Comparing and Contrasting Experiment Questions areanother type of Experimental Design question.As I mentioned earlier, ACT Science passages will often give you multiple experiments or studies in the same passage.They will be labeled Experiment 1 / 2 / 3 or Study 1 / 2 / 3.NOTE: Sometimes there are only 2 experiments/studies, not 3.They'll deal with the same general topic but differ from each other in important ways. Here's an example mini-passage: Scientists wanted to study the impact of different types of gas on the mileage of the Toyota Prius Hybrid.In Study 1, each Toyota Prius received a full tank of either unleaded gasoline. The car then drove 100 miles on the highway at 55 mph. The amount of remaining gasoline was measured.In Study 2, the experiment was repeated, but the cars were given premium gasoline instead of unleaded. The amount of remaining gasoline was measured. Great. Let's break this down.What are the scientists studying here?It's in the first sentence - they want to study the impact of different types of gas on the mileage of the Toyota Prius. In what ways are the two studies similar?In nearly every way - in both, the cars drove 100 miles on the highway at 55 mph, and they measured the amount of remaining gasoline. In what ways are the two studies different?This is key - in study 2, the scientist used premium gasoline instead of unleaded.In this way, they changed the experiment a little bit so they could find something new. ACT Science Tip #4: Real ACT Science passages may not be this easy, but it's the same concept. Some things will remain the same between experiments, but there will always be key differences. Make sure you canfigure out these differences. Learning Checkpoint - what were the independent and dependent variables here?The independent variable was the type of gas used: unleaded or premium. The dependent variable was what was measured: the amount of gas remaining. Why Did They Do X? This is another type of Experimental Design question, in which you are asked why the scientists decided to make a certain choice in the experimental design. For example: As we did before, let’s try to figure out what the question is asking us.I don’t know what â€Å"tared† means, so I’m going to skim the passage.According to the passage, Tared means that the balance of the scale was reset to 0 g.So the question is saying, the students reset the scale to 0 g after putting a cylinder on it in order to better measure what?Also, according to the passage, the students were resetting the scale to 0g and then filling the cylinder with liquid.In order to answer the question, we need to figure what were the students measuring? Well, according to table 1 and the passage, the students measured Mass of H2O (g), Mass of Ethanol (g), Total Mass (g), and Density (g/mL).The point of the experiment was to measure the mass of H2O and Ethanol and total mass of the liquid, so the scientists did not want to measure the mass of the cylinder.So, the scientists reset the scale to 0g to exclude the mass of the cylinder when measuring the H2O, Ethanol, and combined liquid.Therefore, the answer is F. ACT Science Tip #5: In most cases, the answer to this is to make the experiment more robust.Scientists really care about bias or messing up the experiment with unintended side effects.By simplifying the experiment (in this case, by not measuring the cylinder), the scientists can be more certainthat their results are accurate. Hypothetical Changes in the Experiment Almost all questions of this skill type will ask something like, "Suppose the experiments had been repeated, except instead of _____, the scientists did _____. What would you expect to happen?" Here's a real ACT Science practice question along with the necessary visuals to answer the question: First, understand what the question is asking - how is the experiment being changed, and what are we measuring?The question is asking about using a 5 L vessel and adding 7 g of CO2.The experiment is being changed because in the original experiments a 3 L vessel and a 6 L vessel were used.The new experiment is still measuring the same thing: pressure at 7g of CO2 added. Then, figure out from the visuals what they tell you about the relationship between the variables.Are they directly proportional, or inversely proportional?In this case, we can see mass of gas added is directly proportional to pressure (for more information about relationships, check out our other article - LINK) Finally, answer the question incorporating all this knowledge.In the experiment in the 6 L vessel, the pressure at 7 g of CO2 added was about 500 torr.In the experiment in the 3 L vessel, the pressure at 7 g of CO2 added was about 1000 torr.So, if a 5 L vessel is used instead, which is in between 3 and 6 L (though closer to 6 L), the pressure at 7 g of CO2 added will be between 500 and 1000 torr.So, the answer is G. ACT Science Tip #6: The way to solve these questions remains the same, no matter how complicated the questions get. Recap There are 2 types of studies: Observational, where the scientists simply observe and measure data. Experimental, where the scientists design and conduct an experiment. There are 3 kinds of Experimental Design Questions: Independent and Dependent Variable Questions Comparing and Contrasting Experiments Why did they do X? You will also be asked about hypothetical changes to the experiment.The strategy is the same for all four types of questions: Start byfiguring out what the question is asking. Which experiment/study is it referring to? What is it asking about? Variables? Hypothetical changes? Next, look at the corresponding visuals for help answering the question. If you need more information, skim the passage, start by skimming the experiment or study that the question asks about. Skim the rest of the passage if you still haven’t found what you are looking for. Use process of elimination to help you narrow your focus. Do not be tricked by hidden information. Keep digging until you cananswer the question. What’s Next? Now that you have the Experimental Design and Hypothetical Questions covered, if you haven’t already, learn tips and strategies for theothertypes of ACT Science questions such asfactual questionsand the hardest ACT Science questions. Also, learn about the best way to study and practice for ACT Science. Like this article? Want to improve your ACT score by 4 points? Check out our best-in-class online ACT prep program. We guarantee your money back if you don't improve your ACT score by 4 points or more. Our program is entirely online, and it customizes what you study to your strengths and weaknesses. If you liked this Sciencelesson, you'll love our program.Along with more detailed lessons, you'll get thousands ofpractice problems organized by individual skills so you learn most effectively. We'll also give you a step-by-step program to follow so you'll never be confused about what to study next. Check out our 5-day free trial: Have friends who also need help with test prep? 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