yl:history DEBBION HYMAN Contributor OBJECTIVES: AT THE end of the lesson, you should be able to: 1. List three territories which had an active peasantry. 2. Describe three factors that facilitated the development of a Caribbean peasant population and the growth of the free village movement in the Caribbean to the end of the 19th century. The development of the peasantry: 1838 to 1900 One of the defining tenets of the British Caribbean peasantry was the ability of the people to control the land that they used and the time and labour they employed on that land. As a consequence of this requirement, the peasantry in the Caribbean began after 1838 with the freed people who moved off the estates and who established their own smallholdings of an average size of about two acres. The reasons for the setting up of the peasantry are many but, at root, they all reflect the freed people’s desire to move off the plantations which had been their place of abuse and to seek out lives for themselves which they controlled. Additionally, by being skilled agriculturalists, the move to an agriculturally based subsistence lifestyle was one that gave them comfort. The development of the peasantry in the British Caribbean, in terms of its growth and in terms of the ability of the freed people to engage in it, was, however, limited by the unavailability of land. Hence, the peasantry developed only in a few of the territories such as Jamaica, Trinidad, the Windwards and British Guiana. These places had available land which could have been utilised for peasant production by the freed people. From the outset, one notes that the growth of the peasantry was not in keeping with the aim of the plantation. This was because both activities / JERMAINE BARNABY PHOTOGRAPHER R. Danny Williams (right) has words of advice to a group of students at Jamaica College before they selected their career of choice during the launch of the R Danny Williams Career Week at the Jamaica College Auditorium on Monday, February 29. competed for the labour of the freed people. In this context, therefore, one can understand that although the peasants did, in fact, often work on the plantations as part-time wage earners, in general, however, their orientation was in opposition to the plantation. This occurred because they were always looking for more land to expand the peasantry and, by so doing, making their labour less available to the estates. Thus, the two main inputs of the plantation, land and labour, were the two main inputs also required by the peasantry. With no surprise, therefore, we learn that the plantocracy often pursued policies to hamper the growth of the peasantry and keep its labour tied to the estates. These policies included strategies like raising the price of landholdings to make it too expensive for the peasants (peasants often paid £20 per acre of land which could be raised to as much as £200 per acre), as well as to pursue strategies that would lead the peasants into a form of debt peonage. The effectiveness of these policies was, however, limited by the planters’ own indebtness and their own need to secure labour through the offering of incentives to the peasant labour force. The peasantry was a mixed one and the peasants pursued a number of economic activities which were not all tied to their own plots of cultivated land. To this end, they fished and carried on shopkeeping and huckstering, in addition to part-time jobs on the estates. Their land use differed from that of the plantation and resulted in the setting up of smallholdings and villages away from the plantation. Indeed, in British Guiana, for example, by 1852 peasant smallholdings were valued at over £1 million and numbered about 11,000, while in Jamaica, the smallholdings, under 50 acres had grown to 50,000. Historians studying the development of the Caribbean peasantry have identified three stages in its growth. First, a period of establishment which lasted from 1838 up until 1850-60; second, a period of consolidation which followed on and lasted until 1900 and, third, a period of saturation which lasted from 1900 to the present. During these phases, the peasantry established itself as a force for change in the Caribbean and also demonstrated that it, too, was a changing force. As such, the size of the smallholding increased over time (especially in order to remain as viable units) as the focus changed to cash crops to the export market. One realises, therefore, that the peasantry was always a dynamic force that experienced different phases in its development. CONTINUED ON PAGE 22 YOUTHLINK MAGAZINE | MARCH 15-21, 2016 11 yl:english language MELISSA MCKENZIE Contributor I N LAST week’s lesson, we began our focus on Section D of the English A paper. Did you rearrange the given sentences to form a paragraph? Let’s see how you did. Every year during the Easter season, carnival revellers are seen on the street gyrating their sweaty, barely covered bodies. This should not be. Carnival is a waste of time and money for varying reasons. For one, it causes people to spend money they need; two, it encourages promiscuity and, three, it exposes children to sexually suggestive moves. All these reasons highlight how unnecessary carnival is in the society. Was your paragraph arranged in this manner? If so, good going! Writing an introductory paragraph does not have to be an overwhelming task. All you need are the following: - a hook - a thesis statement - a summary of the three supporting points Practice makes perfect, so as you prepare for the English A examination, make use of every opportunity to write essays. Now, once you have gotten the introduction out of the way, you need to focus on developing your points effectively in the body. Oftentimes, the following weaknesses are noted in students’ scripts: - poorly developed points. - repetition of ideas – this means that two paragraphs are focusing on a similar point. - begging the question – this involves circular reasoning and this is where you expect the reader to accept the point without providing real evidence and by saying the same thing by using different words or expressions. - Example: Students who do not follow school rules do not know how to control their behaviour. Most of these students are undisciplined. This is why school rules should not be abolished. - grammatically flawed sentences. Key words to remember when approaching the body are ‘develop’ and ‘support’. Each point you assert must be developed and supported in a meaningful way. Do not be sparing in the 12 Writing persuasively information that you present. The body you present determines your overall mark to a great extent. Again, you are reminded to pay attention to current affairs as CXC usually uses the essay items to test your awareness of what is happening around you. Each body paragraph should have the following elements: - a topic sentence - supporting details - persuasive techniques Below is an example of a paragraph that is weak in its development. It is based on the essay topic: ‘Using drugs is fine as long as it is used in the privacy of one’s home’. This person is in disagreement. Example: Using drugs in the privacy of the home can cause destruction to the family. It only takes one drug abuser in a family to wreck the family by the things they do. This is why drugs should not be used even in a person’s home. While the person has a topic sentence, the rest of the paragraph does not sufficiently elaborate the point of drug use in the home being destructive to the family. It is lacking in specific details. For example: How can the use of drugs cause destruction to the family? This needs to be shown through the use of the relevant supporting details. Take note of the improved paragraph. Improved paragraph: Drug use in the privacy of one’s home can result in the destruction of families. If a member of the family is using drugs such as marijuana or cocaine, he or she will start to behave differently. Research shows that drug users often start to lie or steal to maintain their habit. Also, they may no longer show interest in their jobs or interact with the family. This behaviour will meet the disapproval of family members who will express their concerns. The drug user usually does not appreciate this, thus, resulting in quarrels that can become violent. Resentment and distance would result as communication lines would be severely damaged. Separation or divorce would be an inevitable consequence of all this. Do you notice the difference? Please model this in your own essays. Another important part of developing the body paragraph is the inclusion of persuasive techniques. The most common techniques that are used in CXC type essays are: - expert opinion - statistics - rhetorical questions - emotive language - reference to well-known newspapers or texts - anecdotes Below, I have given you an example of a body paragraph that incorporates persuasive techniques. Example: Additionally, bleaching is extremely damaging to the skin. This practice removes the melanin which exposes the person to the harsh rays of the sun. Prominent dermatologist Dr Neil Persadsingh has asserted that skin bleaching is hazardous to one’s health. Apart from exposing us to the damaging effects of the sun, he states that those who use bleaching cream can absorb the steroids in these products, which can lead to diabetes or high blood pressure. It would be foolish to continue bleaching one’s skin in light of how destructive it has proven to be. YOUTHLINK MAGAZINE | MARCH 15-21, 2016 Persuasive Techniques: Use of expert/authority figure and use of evidence Revise the persuasive techniques that you have covered in these lessons as well as at school. Their presence in your essays assist in adding weight to the points you seek to assert as the examiner will see that you are attempting to give your stance validity. Once you have finished developing your points in the body, the conclusion is the final step. Remember, your conclusion has the following elements: - a restatement of your overall stance - a reassertion of your supporting points I will conclude our focus on Section D by providing you with a sample essay. Please pay attention to how it is organised and how each point is developed. The essay question is sourced from the May 2012 paper. QUESTION Speaker A: The Government should cut subjects like music and visual arts from the curriculum to save money in these hard economic times. Speaker B: No way! I think the government should find other ways to solve economic problems. Write an essay supporting the views of either speaker A or speaker B. The essay below is in support of speaker B. Turbulent economic times in Jamaica have resulted in inflation, unemployment and a sliding dollar. As a result, different recommendations have been put forward and amongst them has been the suggestion to cut music and visual arts from the curriculum in order to assist the Government in solving economic problems. Whilst Jamaica may be experiencing economic challenges, cutting music and visual arts from the curriculum is not the right way to go about tackling these difficulties. For one, there are students who do better in these subjects than the traditional ones; two, accessing these subjects will enable students to pursue careers in these areas and, three, there are other ways the Government can address our economic problems by cutting unnecessary spending. CONTINUED ON PAGE 22 yl:principles of accounts Incomplete records ROXANNE WRIGHT [w2] Capital = Assets less liabilities: Ψ ϳϴϴϬϬ ϲϴϰϬϬ ϭϰϳϮϬϬ ϱϭϮϬϬ ϵϲϬϬϬ &ŝdžĞĚƐƐĞƚƐ ƵƌƌĞŶƚƐƐĞƚƐ >ĞƐƐ͗ ƵƌƌĞŶƚ>ŝĂďŝůŝƚŝĞƐ ĂƉŝƚĂů [w3] Work backwards, i.e., fill up all the figures you know and compute net profit from: Total assets- Liabilities + Drawings = Capital at beginning = $160,800 - ( $8,000 + $8,6000) + $48,000 - $96,000 = $51,600 [w4] Capital at end = Assets at end - Liability at end = ($74,800 + 86,000) - ($8,000 + $53,200) = $99,600 Contributor WORKED EXAMPLE: On January 1, 2012, Jolly Mary financial position was: &ŝdžĞĚƐƐĞƚƐ ƵƌƌĞŶƚƐƐĞƚƐ ƵƌƌĞŶƚ>ŝĂďŝůŝƚŝĞƐ SOLUTION: Ψ ϳϴϴϬϬ ϲϴϰϬϬ ϮϱϲϬϬ 1. Jolly Mary Balance sheet as at December 3͕1, 2012 There were no long-term liabilities. Additional information: i. During the year 2012, he bought fixed assets for $9,200 and borrowed $8,000 repayable in 2013. [>1] ii. At the end of the year, his current assets were $86,000 and current liabilities $53,200. iii. He had taken drawings of $48,000 during 2012 and his fixed assets had depreciated by $13,200. Ψ &ŝdžĞĚƐƐĞƚƐǁхϭ ƵƌƌĞŶƚƐƐĞƚƐ Ψ ϳϰϴϬϬ ĂƉŝƚĂůĂƚďĞŐŝŶŶŝŶŐǁхϮ ϴϲϬϬϬ ĚĚ͗ EĞƚ WƌŽĨŝƚ ǁхϯ >ĞƐƐ͗ƌĂǁŝŶŐƐ ĂƉŝƚĂůĂƚĞŶĚǁхϰ ϵϲϬϬϬ ϱϭϲϬϬ ϭϰϳϲϬϬ ϰϴϬϬϬ ϵϵϲϬϬ >ŽŶŐͲdĞƌŵͲ>ŝĂďŝůŝƚŝĞƐ ϴϬϬϬ ͺͺͺͺͺͺͺͺͺ ƵƌƌĞŶƚ>ŝĂďŝůŝƚŝĞƐ ϭϲϬϴϬϬ 1. Draw up a statement, which may be in balance sheet form, to show the net profit for 2012. [>2] ϱϯϮϬϬ ϭϲϬϴϬϬ Jolly Mary Statement to compute net profit for the year 2012 2. Calculate as at December 31, 2012 for Jolly Mary: a. Working capital b. Capital owned c. Capital employed Ψ REASONING: [>1] Loan is repayable in 10 years’ time; making it a long-term liability. [>2] Formula: Net profit = Capital at end - Capital at beginning + Drawings. Where capital = Assets - Liabilities. ϳϰϴϬϬ ϴϲϬϬϬ >ĞƐƐ͗ >ŽŶŐͲdĞƌŵͲ >ŝĂďŝůŝƚŝĞƐ ƵƌƌĞŶƚ>ŝĂďŝůŝƚŝĞƐ ĂƉŝƚĂůĂƚĞŶĚŽĨLJĞĂƌ >ĞƐƐĂƉŝƚĂůĂƚ ďĞŐŝŶŶŝŶŐŽĨ LJĞĂƌ ǁхϮ ϴϬϬϬ ϱϯϮϬϬ ĚĚ͗ ƌĂǁŝŶŐƐ EĞƚ ƉƌŽĨŝƚ 2. a. WORKINGS: Ψ &ŝdžĞĚƐƐĞƚƐǁхϭ ƵƌƌĞŶƚƐƐĞƚƐ ϭϲϬϴϬϬ ϲϭϮϬϬ ϵϵϲϬϬ ϵϲϬϬϬ ϯϲϬϬ ϰϴϬϬϬ ϱϭϲϬϬ Working capital = Current assets - current liabilities = $86,000 - $53,200 = $32,800 [w1] &ŝdžĞĚƐƐĞƚƐ b. Capital owned = Total assets - total liabilities = 160,800 - $61,200 = $99,600 c. Total capital employed = Total assets - current liabilities = $160,800 -$53,200 = $107,600 Ψ ĂůĂŶĐĞ Ăƚ ďĞŐŝŶŶŝŶŐ ĚĚWƵƌĐŚĂƐĞƐ >ĞƐƐĞƉƌĞĐŝĂƚŝŽŶ ϳϴϴϬϬ ϵϮϬϬ ϴϴϬϬϬ ϭϯϮϬϬ ϳϰϴϬϬ Roxanne Wright teaches at Immaculate Academy. Send questions and comments to [email protected] YOUTHLINK MAGAZINE | MARCH 15-21, 2016 13 yl:biology MONACIA WILLIAMS Contributor I N OUR last lesson, a brief mention was made of the menstrual cycle when the uterus was discussed (Don’t remember? Read the lesson again!). This week, we are going to look at the cycle in detail but, before we begin, how are you? Are you coping with the ‘huge’ volume of work that you are expected to carry out? If you are, congratulations, you are a good and focused planner. If you are not, then you need to take a break and refocus while creating a management plan! Before we look at the menstrual cycle, we need to mention puberty. The menstrual cycle FIGURE 1 MENSTRUAL CYCLE Puberty is defined as the time between childhood and adulthood. It also marks the onset of process of sexual maturing. One change that happens is that girls begin to have periods. During a period, the lining of the uterus (endometrium) breaks down and a small amount of blood and cells pass out of the vagina. This process is known as menstruation. The average age of puberty in girls is 12 to 13 years and in boys it is 13-15. Can you believe that in the 1800s the average age of puberty in girls was 16? The first monthly menstruation is called menarche; girls with a high muscle-to-fat ratio may have delayed menarche. Girls who had early menarche, but who crash diet and lose a lot of weight, can have their menstrual cycle stop for a period of time. THE MENSTRUAL CYCLE As the name suggests, it is a cycle; the end of one is the beginning of another. It is not a calendar cycle; it does not necessarily begin at the start of a calendar month and stop at the end of that month. The average length of the cycle is 28 days. The length varies from 24 to 35 days. Ovulation releases the egg from the ovary. This takes place once within a cycle. The cycle is controlled by hormones. EVENTS OF THE CYCLE As soon as one period finishes, a new egg begins to develop in the ovary. It develops in a sac that contains fluid. This sac is known as a follicle. A hormone that is made in the pituitary 14 starts the cycle. This hormone is known as the follicle stimulating hormone or FSH. As the follicle gets bigger, it moves to the edge of the ovary. The development follicle secretes the hormone, oestrogen. Oestrogen enables the lining of the uterus (endometrium) to become thick and spongy and stops any other egg from developing by stopping the pituitary from secreting FSH. When the follicle is fully developed, ovulation takes place, i.e., the follicle releases its egg/ovum into the Fallopian tube. If fertilization takes place, the fertilised egg is implanted in the thick lining of the uterus wall and the woman is pregnant. If fertilization does not occur, the egg dies and passes out through the vagina. The secretion of oestrogen stops. The corpus luteum (yellow body) forms from the remains of the follicle. This is due to the secretion of another hormone by the pituitary. This time the hormone is luteinizing hormone or LH. The corpus luteum begins to secrete progesterone. Progesterone keeps the uterus lining thick and spongy and well supplied with blood vessels. If the egg is not fertilised, the corpus luteum gradually degenerates and the secretion of progesterone stops. Menstruation also stops. PREGNANCY If the egg is fertilised, the corpus luteum/yellow body does not degenerate immediately. YOUTHLINK MAGAZINE | MARCH 15-21, 2016 The corpus luteum continues to secrete progesterone until the fertilised egg/embryo becomes embedded in the wall of the uterus. A placenta develops. The placenta takes over the secretion of progesterone. Progesterone prevents menstruation by maintaining the lining of the uterus. Hence, menstruation does not (should not) happen during pregnancy. Wow! So many hormones at play, so many to learn! Start now, nuh! Good luck! See you next week! Monacia Williams is an independent contributor. Send questions and comments to [email protected] yl:office administration Factory/works control office HYACINTH TUGMAN Contributor T HE PURPOSE of the factory office is to coordinate the activities of the production process to allow for maximum efficiency and to make quality products in the required quantities. The size of the factory office is generally determined by the manufacturing or production activities that take place in a company. In a large company, there is usually a production department, managed by a production manager who oversees: Manufacturing of articles. Organisation and management of the factory. Factory and production planning. Dispatch and transportation. Stock room. Maintenance of good office services. RELATIONSHIPS OF THE FACTORY OFICE WITH OTHER DEPARTMENTS SALES DEPARTMENT It is important for the factory office to maintain a close relationship with the sales office so that when orders are made, the sales department will check carefully and present to the accountant for clearing (or verification and credit worthiness). Sales invoices are then prepared, after which copies are sent to the dispatch and transport section of the factory office for processing. PURCHASING DEPARTMENT It is the responsibility of the purchasing department to obtain tools and materials for the factory. Therefore, the factory office clerk should be in constant dialogue with the purchasing department, reporting on the status of these. If the factory experiences difficulty in obtaining constant supplies of raw materials from its suppliers, the ‘progress chasing’ clerks work diligently with the purchasing department to locate the materials or to find suitable substitutes. The aim is to keep the production line going, thus ensuring the customer of continued supplies of the commodity. orientation and induction of workers, as well as their welfare and ongoing training. FUNCTIONS OF THE FACTORY OFFICE 1. ORGANISATION OF PRODUCTION ACTIVITIES The major function of the factory office is the organisation of production activities. This is because the office brings together production principles and processes, production staff, production procedures, production materials, machinery and tools, company policies and objectives, as well as statutory rules and regulations in the creation of articles for consumption. The office, therefore, has responsibility for: a. planning and supervising all types of manufacturing. b. maintaining suitable procedures for the control of production. c. maintaining an appropriate level of discipline in the factory. d. maintaining the factory, including power supply, plant, equipment, machinery, tools and buildings. e. maintaining an excellent transportation system. f. suggesting ways in which improvements can be made. 2. IMPLEMENTATION Never too early to make the right choice. Maria Morrison (left), chief operating officer at First Heritage Co-operative Credit Union (FHC), guides siblings 16-year-old Akelia (right) and 10-year-old Anaya Donaldson in selecting the Y.O.U.T.H Plan from FHC’s new Life Charter. The Y.O.U.T.H (Young Ones United in Thrifty Habits) savings plan is perfect for savers up to 16 years old and is a part of the recently launched FHC’s Life Charter, which guides members in selecting the ideal combination of financial products and services for the different stages of their lives. items produced must be carefully stocked away until they are ready to be dispatched to various customers. Raw materials, too, need to be stocked in sufficient quantities so that the production process is not jeopardised. ACCOUNTS DEPARTMENT The accounting department must be involved in the estimating, costing and general budgeting activities for goods production. A factory office clerk must, in some cases, record factory workers’ hours of regular and overtime work and pass the information on to the accounts department for payment to be prepared. Production planning is just one major function of manufacturing goods. Implementation requires the control of various activities. The two important activities are: a. instructing supervisors with regard to what is to be produced and when production is to commence. b. discussing the method of how production is to be utilised, e.g.: I. BATCH PRODUCTION The making of a number of similar items at the same time. For example, a batch of an item is produced for a week and then the production team moves on to something else. II. MASS/FLOW PRODUCTION This involves the production of large quantities of goods to cater to mass demand. Clothing, shoes and cars are usually mass-produced. This method is referred to as an assembly-line operation. III. ONE-LINE PRODUCTION From time to time, factories sign contracts with customers for the production of single, ‘non-repeated’ products as well as a few articles of a similar design, for example, a piece of furniture or a piece of artwork. Next week, we will look at the documents used in the factory and the duties of the factory clerk. Until then, see you. STOCKROOM The stockroom is essential to the production department as HUMAN RESOURCES DEPARTMENT This department is responsible for the recruitment, selection, YOUTHLINK MAGAZINE | MARCH 15-21, 2016 Hyacinth Tugman is an independent contributor. Send questions and comments to [email protected] 15 yl:information technology Modularity/top-down design approach NATALEE A. JOHNSON Contributor G OOD DAY, students, this is lesson 25 in our series of lessons. In this week’s lesson, we will look at modularity/top-down design and programming languages (the beginning of a new unit). solve a problem on the computer; and you have been learning, thus far, how to write your pseudocodes and how to construct your flow charts. Now you are going to learn about a technique that can be employed when you have a big program to code or problem to solve. This method is called the top-down design approach to programming. WHAT IS TOP-DOWN DESIGN? USE OF THE TOP-DOWN DESIGN APPROACH TO PROBLEM SOLVING The top-down design approach or modular programming, as it is sometimes called, involves breaking a problem into a set of You have learnt in previous lessons the way in which you Problem: Calculator Task 1 Task n Sub_task_2: Performing calculations to subtract numbers Task 1 Task n Sub-task_3: Performing calculations to multiply numbers Sub-task_4: Performing calculations to divide numbers Task Task As you may observe with the diagram above there is a Major Problem which has been broken down PROGRAMMING LANGUAGES MACHINE LANGUAGE Programming languages fall into the following categories: 1. Machine Language - categorized as a 1st Generation language 2. Assembly Language - categorized as a 2nd Generation language 3. High Level Language - categorized as a 3rd Generation language 4. Fourth Generation Language This was the first language available for programming. At the machine level, the instructions are written in ones and zero (binary digits). This is the only language that the computer understands. See diagram below. These languages can be further categoried as either being lowlevel or high-level languages. LOW LEVEL Machine Language Assembly Language HIGH LEVEL High Level Language Fourth Generation Language Let us now examine each of these languages. 16 Let’s assume you were creating a program to simulate the basic operations of a calculator. Below is a diagram depicting a typical top-down design or modularity approach to programming for the calculator scenario. As you may observe with the diagram, there is a major problem which has been broken down into two subproblems. The subproblems are then broken down into respective tasks for which specific action(s) will be carried out. for the calculator scenario. Sub_task_1: performing calculations to add numbers smaller problems, called subproblems or modules, followed by breaking each subproblem into a set of tasks. This is called a ‘divide-and-conquer’ approach. When faced with a complex problem, it is easier to break the problem down into smaller, more manageable sections and tackle each section as a separate entity, than trying to solve the large problem in one go. ADVANTAGES: Programs execute fast Efficient use of memory ϬϬϬϬϬϬϬ ϭϬϬϭϬϬϭϬ ϭϬϭϬϭϬϭϬ ϭϬϬϬϭϬϬϬ ϬϭϭϬϭϭϬϭ ϬϬϬϭϭϬϬϬ ϬϭϬϭϬϭϬϭ ϬϬϭϭϭϬϬϭ DISADVANTAGES: Programming is slow and tedious Code is difficult to learn, read, understand and correct Code is machine specific that is, it cannot be used in the same form on other computer models ASSEMBLY LANGUAGE This was developed to replace the zeros and ones of machine language with symbols that are easier to understand and remember. It uses special codes called mnemonics (words that suggest meaning) to represent machine language instructions. See the diagram. YOUTHLINK MAGAZINE | MARCH 15-21, 2016 A subproblem is a set of related tasks. A task is a set of related actions. An action is a basic instruction that needs no further refinement. For example, an action might be a simple instruction such as subtract two numbers. The process of dividing the problem into subproblems, or modules, and breaking them down into smaller units is called stepwise refinement. One advantage of modular programming is that when a problem has been decomposed into smaller subproblems, each subproblem can be solved as a single entity. However, the solution of each individual subproblem does not necessarily solve the larger problem. There must be cohesion between the modules. That is, there must be a mechanism for communicating between the different subproblems. An assembly language is >K y͕z translated into a machine y͕z language by using a translator ^dKZ program called an assembler. However, both the machine language and assembly language programs are machine dependent, i.e., the way the program is written depends on the operation of the computer. ADVANTAGES: Programming is faster and less tedious than for machine language. Code is easier to learn, read and understand than for machine language. Execution is faster than high-level languages. DISADVANTAGES: Programming is slower and more tedious than high-level languages. Code is machine specific. CONTINUED ON PAGE 22 yl:chemistry Electrolysis of aqueous solutions - FRANCINE TAYLOR-CAMPBELL the sodium chloride solution is dilute, then OH ions are discharged in preference to Cl . 4OH (aq) ---> 2H2O (l) + O2(g) + 4e If the solution is concentrated, then Cl- ions are discharged preferentially and, in this case, a carbon electrode is used instead of platinum, as they are resistant to attack by chlorine. 2Cl (aq) ---> Cl2 (g) + 2e Contributor YOU SHOULD BE ABLE TO: Identify ions present in electrolytes. Predict the electrode to which an ion will drift. Identify the products appearing during electrolysis and write relevant ionic equations. Describe the electrolysis of certain substances: conc hydrochloric and dil sulphuric acid; conc aq sodium chloride and dil aq sodium chloride; copper (II) sulphate using carbon or platinum and copper electrodes, and fused halide, e.g., lead bromide. When electrolysing aqueous solutions, the ions of the substance being electrolysed and water are present. The discharge of ions at the electrodes will, therefore, be dependent on the position of the ion in the electrochemical series, the concentration of the solution and the type of electrode being used. In some cases, i.e., for active electrodes, the anode may dissolve to provide electrons, e.g., a copper electrode in the electrolysis of aqueous copper sulphate. Cu(s) ---> Cu2+(aq) + 2e (left at the anode) since this occurs more readily than the discharge of the anions. Platinum and carbon (graphite) are inert electrodes, they do not form ions during electrolysis. At the cathode, if more than one type of positive ion arrives at the cathode, the one which gives up its charge most readily, i.e., + + + the least electropositive ion, is discharged, e.g., H and Na , H + is preferentially discharged 2H (aq)+ 2e ---> H2 (g). Thus, the ion derived from the element lower in the electrochemical series is discharged. ELECTROLYSIS OF AQUEOUS COPPER (II) SULPHATE SOLUTION + At the anode, the least electronegative ion is discharged, i.e., the ion which gives up its charge more readily. Thus, in the electrolysis of dilute aqueous sodium chloride, OH ions are discharged in preference to Cl ions. + - + 2+ 2- Ions present are H and OH from water, and H and SO4 from sulphuric acid. + At the cathode: H ions migrate towards the cathode and are + discharged as hydrogen gas. 2H (aq) + 2e ---> H2 (g) - 2- At the anode: OH and SO4 migrate towards the anode, but 2the OH ion is discharged in preference to the SO4 ion. 4OH (aq) ---> 2H2O (l) + O2(g) + 4e Comment: Since 4mol of electrons are produced at the anode, then these 4mol of electrons must be used up at the cathode. So, in this reaction, for every 1mol of oxygen gas produced, 2 mol of hydrogen gas are formed. - 2- + At the cathode: Cu and H ions migrate towards the cathode, 2+ + where the Cu ions are discharged in preference to H ions as it is lower in the series. 2+ Cu (aq) + 2e ---> Cu (s). This copper is deposited on the cathode, which gets thicker. The blue colour of the copper sulphate solution gradually fades. Due to the high concentration of an electrolyte, its anion may be discharged in preference to a less electronegative ion. For example, with concentrated aqueous sodium chloride, Cl ions are discharged in preference to OH ions (from water). ELECTROLYSIS OF DILUTE SULPHURIC ACID 2+ Ions present: H , Cu , OH and SO4 ELECTROLYSIS OF AQUEOUS SODIUM CHLORIDE USING PT/C ELECTRODE. + + - - Ions present: Na , H , OH and Cl + + At the cathode: Na and H migrate towards the cathode, but + + H is discharged in preference to Na (lower in electrochemical series). + 2H (aq) + 2e ---> H2(g) - - At the anode: OH and Cl ions migrate towards the anode. If YOUTHLINK MAGAZINE | MARCH 15-21, 2016 At the anode: Two reactions can occur at the anode depending on the type of electrode used. Using Pt/C electrodes, OH ions are discharged in preference to SO42. 4OH (aq) ---> 2H2O(l) + O2(g) + 4e. The solution becomes acidic as Cu2+ and OH ions + 2 are removed, leaving H and SO4 ions. Using copper electrode as the anode results in the copper from the electrode being converted to copper ions (a process which requires less energy) and the anode dissolves and gets 2+ thinner. Cu(s) ---> Cu (aq) + 2e. The concentration of the solution is unchanged (the blue colour remains the same). Francine Taylor-Campbell is an independent contributor. Send questions and comments to [email protected] 17 yl:social studies Human and physical resources MAUREEN CAMPBELL Contributor the population. The higher the birth rate, the more babies are born. THE FOLLOWING are the concepts you should know; add these to your dictionary. FERTILITY RATE CONCEPTS RELATED TO HUMAN RESOURCES This is the number of children born for every 1,000 women of child-bearing age, approximately 15- 40 years of age. Population, birth rate, death rate, natural increase, life expectancy, infant mortality rate, fertility rate, migration, immigration, emigration, net migration, brain drain, urbanization, depopulation, population density, population distribution, dependency ratio, employment, unemployment, underemployment, unemployable, labour force, sustainable development, population census, resource and human resource. CONCEPTS RELATED TO PHYSICAL RESOURCES Development, environment, conservation, energy, renewable resource, natural resource, non-renewable resource, infrastructure, food security, pollution, conservation, global warming and green house effect. DESCRIBE THE STRUCTURE AND CHARACTERISTICS OF A POPULATION Population is the total number of persons inhabiting a country, city or any district or an area. The correct term for the study of the population is demography. This is the study of the changes in the composition: the size, age, distribution, sex balance of the population. HUMAN MIGRATION This is a ratio that compares the percentage of the population available for work (15-64) and that which is economically inactive. To get this ratio, we look at the number of all children 14 and under plus those aged 65 and over, then divide by the number of adults aged 15-64. However, as a population, we must realise that the higher the ratio, the more potential problems for the future. The movement by people from one place to another with the intentions of settling temporarily or permanently in the new location. The movement is typically over long distances and from one country to another, but internal migration is also possible. Migration may be individuals, family units or in large groups. This is the age/sex balance that exists. As mentioned before, the usual way to show this is with a population pyramid. This is simply a combination bar graph showing the percentage of males at different ages and the percentage of females at different ages. It can, however, tell us a lot about a country and its development. POPULATION PYRAMIDS CHARACTERISTICS OF THE POPULATION PYRAMID A population pyramid is a graph that shows the age/sex distribution of a given population. It is a graphic profile of the population’s residents. Sex is shown on the left/right sides, age on the y-axis, and the percentage of population on the x-axis. Each grouping (e.g., males aged 0-4) is called a cohort. We can analyse it to predict the future and plan accordingly. When the base is very wide, it indicates a very high birth rate. If the width drops off very quickly, it means that there are not many people living to very old ages; very few reach old age. If there is a large base, so a high birth rate, but also a wider and taller pyramid, this means that more people are living to older ages. SAMPLE POPULATION PYRAMIDS A more ‘domed’ shape means many people are living to older ages as quality of life improves. There are also proportionately fewer births. There may also be a very small base due to the very low birth rates and death rates displayed in the wide top. With this, there are serious implications about providing for the elderly population as there is an increasing cost of health care and the need for more pensions, especially as the working population becomes proportionally smaller. POPULATION STRUCTURE Population structure means the ‘make-up’ or composition of a population. Looking at the population structure of a place shows how the population is divided up between males and females of different age groups. Population structure is usually shown using a population pyramid. POPULATION COMPOSITION Population structure is the population make-up of a country. The population structure is commonly described using a population pyramid. A wide population pyramid at the base means that there is a large proportion of youths and is a structure of a developing country. It includes various aspects of the society, including the population density, distribution, size and stratification. Population composition refers to the combined demographic characteristics of persons within a geographic area. This includes age, sex, occupation, ethnicity, religion, dependency ratio. Age, sex, race and ethnicity, to an extent, are all ascribed characteristics at birth, and in most cases, not amenable to change. POPULATION SIZE ETHNICITY This is determined by the number of people born, the number of people who die and the difference between the numbers entering and leaving the country. ‘Out of Many, One People’ illustrates the racial mixture in the Caribbean. There are two distinct factors which influence the size of families across ethnic groups: their culture and age composition of the ethnic group. BIRTH RATE The number of babies born in a year for every 1,000 people in 18 DEPENDENCY RATIOS CONTINUED ON PAGE 19 YOUTHLINK MAGAZINE | MARCH 15-21, 2016 yl:principles of business YVONNE HARVEY PUBLIC-SECTOR BUSINESSES: H Local authorities Contributor I. THIS week, we will continue with our look at the types of businesses in the public sector of a mixed economy by considering local authorities. This type of business is also known as local governments, parish councils, boroughs and municipal corporations. Such entities are under the authority of the Parliament of the country. A minister of central government is put in charge of local government affairs. These bodies are set up to deal with matters of local concern. The councillor in charge is elected, at local government elections, by those who live in the area concerned and his or her powers, duties and functions are defined by an Act of Parliament. Each local government consists of a council with a chairman or mayor at its head. This chairman or mayor is elected from among the councillors and presides over the meetings of the council. He or she also represents the town or district on important civic occasions such as the opening of a new hospital or sports stadium. Where there are a large number of councillors, small groups called committees are formed and assigned specific tasks. They work at the ‘grass roots’ in order to understand people’s needs. These are presented at council meetings. The powers of the local authority differs from country to country. However, in most countries, they are responsible for such things as water supply, drainage, sewerage, garbage disposal, street cleaning, community health services, maintenance of roads, parks, markets and gardens, cleaning of drains and gullies, bushing of roads, provision of fire services and poor relief, and the maintenance of sports facilities. These entities also oversee and report on projects undertaken in the community. The local authority is financed through central government grants, rates (property taxes) and loans. The central government ensures that the money is properly spent by employing auditors whose job it is to examine and check the accounts of the local authorities. Local authorities play an important role in the commercial and economic development of the country. ADVANTAGES OF LOCAL AUTHORITIES 1. The people at the local level have a say in what goes on in their community. Therefore, they actually participate in the decisionmaking at this level. 2. The input of the people helps to guide and shape the overall policies of government. 3. Social, physical, economic, political and other issues are addressed at the local level. DISADVANTAGES OF LOCAL AUTHORITIES 1. The continuity of projects and activities is affected by a change of government. 2. Resources are not always available; therefore, local authorities experience setbacks in their projects and activities. ASSIGNMENT (a) Define local authorities. (2 marks) (b) Briefly describe the organisational structure of the local authority. (3 marks) (c) List four activities that may fall under the responsibilities of the local authorities. (4 marks) (d) State three sources of finance for local authorities. (3 marks) (e) Discuss two advantages and two disadvantages of local authorities. (8 marks) Total marks: 20 Remember, balance is one of the keys to success. Keep safe, my friends? Yvonne Harvey teaches at Glenmuir High School. Send questions and comments to [email protected] yl:social studies CONTINUED FROM PAGE 18 AGE Government will have to create policies and resources based on the age composition. This is so as the greater the numbers of younger people in a society, the higher the birth rate. Knowing the proportion of the population in each age group is important in every country for development purpose. It influences whether a population will increase in size. High growth rates mean more young people. SEX Populations can be divided into male and female. More women than men live to an old age as the over-80 age group is predominantly female majority. This is stated as the number of males to 100 females. OCCUPATION People change their occupation as they go through the life Christianity is the dominant religion to be found in the region – a legacy of the plantation. Islam and Hinduism are the legacy of indentureship, and there are many religions that are associated with our mixed cultural base. Witness 1.9%, Rastafarian 1.1%, other 6.5%, none 21.3%, unspecified 2.3% (2011 est) Sex ratio at birth: 1.05 male(s)/female 0-14 years: 1.04 male(s)/female 15-24 years: 1.01 male(s)/female 25-54 years: 0.97 male/female 55-64 years: 0.98 male/female 65 years and over: 0.81 male/female total population: 0.98 male/female (2014 est) ASPECTS OF JAMAICA’S DEMOGRAPHIC PROFILE ACTIVITIES Ethnic groups: black 92.1%, mixed 6.1%, East Indian 0.8%, other 0.4%, unspecified 0.7% (2011 est.) Religions: Protestant 64.8% (includes Seventh-day Adventist 12.0%, Pentecostal 11.0%, Other Church of God 9.2%, New Testament Church of God 7.2%, Baptist 6.7%, Church of God in Jamaica 4.8%, Church of God of Prophecy 4.5%, Anglican 2.8%, United Church 2.1%, Methodist 1.6%, Revived 1.4%, Brethren .9%, and Moravian .7%), Roman Catholic 2.2%, Jehovah’s 1. Identify three observations that can be made about the sex ratio of the Jamaican population using the chart above. 2. Why is it necessary to study a country’s population? 3. State the major components used to describe the population of a country and explain why we need to study them? cycle, moving from one job to another as their career develops, then to retirement. RELIGION YOUTHLINK MAGAZINE | MARCH 15-21, 2016 Maureen Campbell teaches at St Hugh’s High School. Send questions and comments to [email protected] 19 yl:mathematics Length of a vector CLEMENT RADCLIFFE EXAMPLE x , then the length of AB2 = x2 + y2 y It follows that for AB = Contributor I expect that you had no difficulty in understanding the above. If this is the case, let us attempt another example. AT THE outset, let us review the homework given last week. HOMEWORK The diagram below shows vector b and vector c. Express in the form : (i) b (ii) c (iii) c + b (iv) 2b - c While the aspects of vectors presented above are relatively simple, the points noted are sometimes missed by students to their detriment. Please review and note them well. PRACTICE EXAMPLES SOLUTION (a) Using theg graph g p (i) Express each of the position vectors OA and OB in the form (ii) Determine the vectors: (a) 3 OA , (c) 3OA – In the diagram above, A and B are points such that OA = a and OB = b. The point P (not shown) is such that OP = (i) b = 2 –1 (iii) b + c = (ii) c = 2 + –5 –1 3 –5 3 = (iv) 2 b – c = 2 2 – –1 –5 = 3 = 9 –5 We will now continue vectors by reviewing the length of a vector. Write OP in the form (ii) Determine the length of OP. ½ Length of a vector on Cartesian diagram. 8 6 illustrated on the Cartesian diagram as follows: As ACB is a right-angle triangle then, using Pythagoras’ Theorem AB2 = AB2 + CB2 AB2 = 82 + 62 = 64 + 36 Therefore AB = √100 = 10 20 ∴OP = OA = 3 4 and OB 2 -1 NOTE + 5 11 The coordinates of A and B were used to determine the position vectors OA and OB. You could also have read off the components directly from the graph. In this case, joining OA and OB should make it easier. (a) Given that OA = = 3 4 + 5 11 = 8 15 9 12 (b) Given that OB = 3 4 then 3 OA = 9 12 Answer is = ½a+b 6 8 (iii) If OA + OB = | c | , show that c = 34 ∴ the position vectors are position vector OA = 6 8 ∴position vectors a= 6 and b = 5 8 11 then The vector AB = x y It was illustrated in last week’s lesson that if the coordinates of A is (6, 8), then the Since OP 2OB (i) The coordinates of A and B, respectively, are (3, 4) and (2, -1). (i) (i) From the diagram, the coordinates of A = (6, 8) and B = (5, 11). 4––5 –2 – 3 hence determine (b) – 2OB a + b, SOLUTION –3 2 x y Answer is (ii) Using the formula for length: OP2 = x2 + y2 [Using Pythagoras’ Theorem] = 82 + 152 = 64 + 225 = 289 length of OP = √289 = 17 YOUTHLINK MAGAZINE | MARCH 15-21, 2016 (c) 3OA – 2OB = Answer is then –2OB = –4 2 –4 2 8 15 I do hope you realise that the coordinates of the point P are (8, 15). 2 –1 9 12 + –4 2 = 5 14 5 14 CONTINUED ON PAGE 21 yl:english literature BERYL CLARKE Contributor T HIS TIME when we see Caesar, it is only after, as members of the audience, we have watched the plot develop against his life. Now we know that Brutus, having been flattered by Cassius’ lying ingenuity, in addition to his own feelings, is a prominent part of the murder plot. We see him as he agonizes over what we can imagine is the situation that faces him and the decision he has to make. After the plotters leave his home, his wife is made known to us as she takes the stage in her role as a loving, concerned and strong wife and woman. Portia, in her self-description, makes it clear that she considers herself a fitting partner for Brutus, one who could face up to anything. Later we will see whether she is as strong as she claims. How far do you agree with Brutus’ reason for wanting Caesar dead? He can find nothing in Caesar’s character or conduct to condemn him. He has only the fear that Caesar would become a tyrant were he to ascend to the throne. On that premise he thinks: Fashion it thus: that what he is augmented, Would run to these and these extremities; And therefore think him as a serpent’s egg, Which, hatched, would as his kind grow mischievous, And kill him in the shell. This is said by Caesar’s friend! Have you ever heard the expression: “With friends like these, who needs enemies?” Make sure to involve yourselves in full discussions on this speech now and later as we work through this play. ‘Caesar’ Did you expect to hear of such happenings as take place on the night before the assassins’ act? Of course, we cannot be surprised that we hear and not see these things, for technology was not then at the level where such could be presented. Take a careful look and you will see how the audience gets information and how the play itself moves forward. For instance, listen to Casca’s description of the strange events, including that of a surly lion passing him on the open street without ‘annoying him’, and then consider Cassius’ response. It gives him another opportunity to speak of his bravery, to put out his interpretation of the strange events and to criticise Caesar. When the conspirators get together under the cover of darkness and making sure to protect their identities, which casts some doubt on the purity of their plan, they naturally discuss the murder of Caesar. In so doing, we realise that importance is placed on the effect the character of some is expected to have on the people. It is ironic that Brutus, who is brought in for the same reason, does not see here how he too is being used. Of great significance is the decision taken about Mark Antony. He is completely misread by Brutus, who convinces the others against Cassius’ better understanding that he, Antony, is no threat whatsoever. Do you notice how much authority Brutus has among the conspirators and how they defer to him? Cassius knew what he was doing when he convinced Brutus to join. In Act 2 Scene 2, Caesar and his wife Calpurnia again take the stage, introduced, as it were, by thunder and lightning. The audience is being prepared for frightening action, tension is being created. She, too, is aware of all the unusual occurrences of the previous night. In addition, her sleep had been disturbed by terrible dreams and this is known to her husband. Distraught, she tries to convince him not to go to the Senate on that day. As you know, he refuses to listen to her on the grounds that he is not afraid, even though he sends to the priests for them to make a sacrifice to see if all would be well; when Calpurnia and the priests agree that he would be in danger, he decides to stay home. You should take notice of his ‘What can be avoided Whose ends is purposed by the mighty gods?’ and ‘Cowards die many times before their deaths; The valiant never taste of death but once’ as these tell us that he wants to go to the Senate but wishes also to please his wife. Decius’ task of getting him to agree to leave home is, therefore, made easy by Caesar’s own inclination to do so. Do you agree? We close this week by considering a few questions. 1. What is signified by Brutus’ shaking hands with the other conspirators? 2. Why is the soothsayer introduced in this part of the scene? 3. Does Portia’s appearance in the latter stages of this scene contribute to the play? If so, what? Have a productive week and God bless! Beryl Clarke is an independent contributor. Send questions and comments to [email protected] yl:mathematics CONTINUED FROM PAGE 20 The hence in the question indicates that the answers in (a) and (b) should be used to solve the part (c). While other methods may be used, the method you are directed to use is usually the simplest approach. Always obey the instructions. A common error is to subtract the two vectors found above, instead of adding. This is justified as follows: 3 4 + 2 –1 = |As |c|is the length of vector c =, 5 3 Express vectors OA & AB in the form then |c|= 52 +32 = (25 + 9) = 34 Answer : 34 x y I wish you a productive week as you continue to review vectors. Next week, we will begin the review of matrices. HOMEWORK 1. Given the points on the Cartesian diagram, S(- 4, 3) & R(6 , 2). Write in the form x 3OA – 2OB = 3OA + ( – 2OB) Since you were requested to find vectors ( 3OA) and ( 3OA) and (- 2OB) you, therefore, add both answers. ∴c = y S| (– 2OB) Clement Radcliffe is an independent contributor. Send questions and comments to [email protected] 2. The position vectors of the points A & B relative to the (ii) Since OA + OB = c origin O, are –2 4 & 3 5 YOUTHLINK MAGAZINE | MARCH 15-21, 2016 21 yl:history CONTINUED FROM PAGE 11 CONTINUED FROM PAGE 12 An important developmental aspect of the peasantry was its move from an activity providing initial subsistence for the freed people to one geared towards the production and export of cash crops and products. To this end, we note that the peasants produced export crops and products such as arrowroot, cotton, sugar, bananas, citrus, logwood, rum, spices, coffee, cocoa, ginger and pimento. The peasantry also introduced new crops and diversified the monoculture of the sugar economies. By their activities they, ultimately, led to a level of self-sufficiency for the colonies that was never attained in the previous years under enslavement. Indeed, by removing the focus from the plantation, the peasantry directly stimulated the growth of an independent village life for the freed people with the associated services and amenities such as churches, schools and markets. Indeed, the development of the co-operatives in the Caribbean has been traced to this peasant development. To begin with, every child has a subject that he or she is competent in. For some, it may be the traditional subjects like mathematics or English Literature while for others their creative energies are encouraged when they pursue subjects like music and visual arts. Isn’t school supposed to cater to the specific learning styles or needs of a child? Limiting a child who has an inclination for music or visual arts can result in feelings of frustration and failure. If the Government cuts subjects like music and visual arts, it will be cutting the growth and development of some children. These children should be allowed to pursue subjects they have a passion for without having to worry that they might be cut from the curriculum. Ultimately, the growth of the peasantry in the British Caribbean was one that succeeded not because of, but largely in spite of, the colonial authorities. Since the peasants consisted largely of the freed people and they were competing with the estates, no real encouragement was given to them by the local governments. Agricultural innovation and assistance that could easily have been provided by the state were denied these peasants. Indeed, it was not until the later part of the 19th century, with the agitation of the period and reports like those of the Royal West India Commission of 1897 (which pointed out that the peasantry was ‘a source of both economic and political strength’), that the peasants were taken seriously. In spite of these realizations, however, little had actually been done in terms of official support, and the Caribbean peasantry has still continued to exist largely because of the resilience of its participants. ACTIVITY Extended Writing: Imagine that you are a journalist in Trinidad in the 1890s and assigned to the newspaper The Economic Times. Write an article for the newspaper in which you examine the factors that have led to the development of the peasantry. SOURCES 1. A Post Emancipation History of the West Indies – Isaac Dookhan 2. Freedoms Won: Caribbean Emancipations, Ethnicities and Nationhood – Hilary Beckles & Verene Shepherd 3. Notes on Peasant Development in the West Indies since 1838 – Woodville Marshall Debbion Hyman is an independent contributor. Send questions and comments to [email protected] 22 yl:english language Additionally, students enrolled in subjects such as music and visual arts often become artists, musicians or artistes. Cutting these subjects would be depriving students of the opportunity to pursue these careers. It would have been a robust music curriculum that would have nurtured an artiste like Romain Virgo, who has enjoyed much success, locally and internationally. Furthermore, these careers impact the island tremendously through foreign exchange because tourists visit our island annually to attend shows such as Rebel Salute or Reggae Sumfest to see acts like Romain Virgo. The money these tourists spend here benefits the island greatly by boosting economic growth, and the annual reports from the Ministry of Tourism support this. Moreover, there are better ways of solving the economic situation the island is in. For example, the travelling, utility and personal allowances of members of parliament can be decreased or even removed. The salaries of these ministers are more than enough to take care of their personal expenses. Additionally, the media houses have aired stories that reveal the wastage of money on projects that are not regulated properly. Wouldn’t the Government save more money in these instances [rather] than depriving students of subjects that foster the kind of creativity that positively impacts our economy? In conclusion, some individuals might suggest that cutting these subjects will help in solving some of our economic problems, but this is not true. Such a move would restrict the subject choices of some students and impair their career options. Furthermore, the Government should find other means of addressing the financial challenges the island is presently experiencing. Removing music and visual arts is not one of them, and considering that as an option is rather retrograde in a global space that is constantly evolving. I hope this sample essay will prove useful as you practise to write your own essays. See you next week! yl:information technology CONTINUED FROM PAGE 16 HIGH-LEVEL LANGUAGES These differ from low-level languages in that they require less coding details and make programs easier to write. They are closer in appearance to natural language, for example, English and French. Programs written in high-level language is called source code, while the translated version is called object code. These programs must be translated to a form which can be accepted by the computer. This is achieved by means of special translator programs called compiler and interpreter. Here is a diagram illustrating the relationship between the source code and the object code. SOURCE CODE TRANSLATOR COMPILER or INTERPETER OBJECT CODE >/E<ͬ>KZ ;ƐƚŽƌĞƐĐŽĚĞŝŶ ŵĞŵŽƌLJͿ yhd> K In contrast to a compiler, an interpreter does not translate the whole program prior to execution. Rather, it translates the code, line by line, during the execution of the program. With the compiler, all the translation is done, and then the object program is executed. They are not machine-dependent. Examples of high-level language are BASIC (Beginners All Purpose Symbolic Instruction Code), Pascal (which is the programming language you will learn for CSEC), COBOL (Common Business Oriented Language), JAVA, C programming and so on. Below is an example of Pascal code. ADVANTAGES: Programming is faster and less tedious. Code is easier to learn, read, understand and correct. Language is more English and math like. ƉƌŽŐƌĂŵ ĂĚĚŝƚŝŽŶ;ŝŶƉƵƚ͕ ŽƵƚƉƵƚͿ͖ ǀĂƌ ŶƵŵϭ͕ ŶƵŵϮ͕ ƐƵŵ͗ŝŶƚĞŐĞƌ͖ ĞŐŝŶ ǁƌŝƚĞůŶ;͚ŶƚĞƌƚǁŽŶƵŵďĞƌƐ͛Ϳ͖ ƌĞĂĚ;ŶƵŵϭ͕ŶƵŵϮͿ͖ ƐƵŵ͗сŶƵŵϭнŶƵŵϮ͖ ǁƌŝƚĞůŶ;͚dŚĞƐƵŵ ŽĨƚŚĞŶƵŵďĞƌ ŝƐ͕͛ƐƵŵͿ͖ ŶĚ͘ DISADVANTAGES: Program executes slowly. FOURTH GENERATION They are often described as very high-level language and referred to as 4GLs. They are easy-to-learn, easy-to-use languages that enable users or programmers to code applications much quicker than they could with lower-level languages. Two examples of 4GLs are DBASE and FOXPRO. ADVANTAGE: Useful for generating reports. DISADVANTAGE: Can be very wordy. QUOTE OF THE WEEK “Move out of your comfort zone. You can only grow if you are willing to feel awkward and uncomfortable when you try something new.” ~ Brian Tracey We have come to the end of this lesson. See you next week, when we will look at some key programming terms and the Pascal language. Remember, if you fail to prepare, you prepare to fail. Melissa McKenzie teaches at Old Harbour High School. Send questions and comments to [email protected] Natalee Johnson teaches at Ardenne High School. Send questions and comments to [email protected] YOUTHLINK MAGAZINE | MARCH 15-21, 2016
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