Tag: Psychology (IELTS)

  • Cambridge IELTS 9 Academic Reading Test 4

    Cambridge IELTS 9 Academic Reading Test 4

    Reading Passage 1

    The Life and Work of Marie Curie

    The Life and Work of Marie Curie IELTS Academic Reading Passage 1 with answers and explanations.
    Part of the image by pixabay.com

    Marie Curie is probably the most famous woman scientist who has ever lived. Born Maria Sklodowska in Poland in 1867, she is famous for her work on radioactivity, and was twice a winner of the Nobel Prize. With her husband, Pierre Curie and Henri Raeqiierel, she was awarded the 1903 Nobel Prize for Physics, and was then sole winner of the 1911 Nobel Prize for Chemistry. She was the first woman to win a Nobel Prize.

    From childhood, Marie was remarkable for her prodigious memory, and at the age of 16 won a gold medal on completion of her secondary education. Because her father lost his savings through bad investment, she then had to take work as a teacher. From her earnings, she was able to finance her sister Bronia’s medical studies in Paris, on the understanding that Bronia would, in turn, later help her to get an education.

    ln 1891 this promise was fulfilled and Marie went to Paris and began to study at the Sorbonne (the University of Paris). She often worked far into the night and lived on little more than bread and butter and tea. She came first in the examination in the physical sciences in 1893, and in 1894 was placed second in the examination in mathematical sciences .It was not until the spring of that year that she was introduced to Pierre Curie.

    Their marriage in 1895 marked the start of a partnership that was soon to achieve results of world significance. Following Henri BecquereI‘s discovery in 1896 of a new phenomenon, which Marie later called ‘radioactivity’, Marie Curie decided to find out if the radioactivity discovered in uranium was to be found in other elements. She discovered that this was true for thorium.

    Turning her attention to minerals, she found her interest drawn to pitchblende, a mineral whose radioactivity, superior to that of pure uranium, could be explained only by the presence in thorium of small quantities of an unknown substance of very high activity. Pierre Curie joined her in the work that she had undertaken to resolve this problem and that led to the discovery of the new elements, polonium and radium. While Pierre Curie devoted himself chiefly to the physical study of the new radiations, Marie Curie struggled to obtain pure radium in the metallic state. This was achieved with the help of the chemist André-Louis Debierne, one of Pierre Curie’s pupils. Based on the results of this research, Marie Curie received her Doctorate of Science, and in 1903 Marie and Pierre shared with Becquerel the Nobel Prize for Physics for the discovery of radioactivity.

    The births of Marie’s two daughters, Irene and Eve, in 1897 and 1904 failed to internrupt her scientific work. She was appointed lecturer in physics at the Ecole Nor-male Supérieure for girls in Sevres, France (1900), and introduced a method of teaching based on experimental demonstrations. In December 1904 she was appointed chief assistant in the laboratory directed by Pierre Curie.

    The sudden death of her husband in 1906 was a bitter blow to Marie Curie but was also a turning point in her career: henceforth she was to devote all her energy to completing alone the scientific work that they had undertaken. On May 19, 1906, she was appointed to the professorship that had been left vacant on her husband’s death, becoming the first woman to teach at the Sorbonne. In 1911 she was awarded the Nobel Prize for Chemistry for the isolation of a pure form of radium.

    During World War I, Marie Curie, with the help of her daughter Irene, devoted herself to the development of the use of X—radiography, including the mobile units which came to be known as ‘little Curies’, used for the treatment of wounded soldiers. ln 1918 the Radium Institute, whose staff Irene had joined, began to operate in earnest, and became a centre for nuclear physics and chemistry. Marie Curie, now at the highest point of her fame and, from 1922, a member of the Academy of Medicine, researched the chemistry of radioactive substances and their medical applications.

    ln 1921, accompanied by her two daughters, Marie Curie made a triumphant journey to the United States to raise funds for research on radium. Women there presented her with a gram of radium for her campaign. Marie also gave lectures in Belgium, Brazil, Spain and Czechoslovakia and, in addition, had the satisfaction of seeing the development of the Curie Foundation in Paris, and the inauguration in 1932 in Warsaw of the Radium Institute, where her sister Bronia became the director.

    One of Marie Curie’s outstanding achievements was to have understood the need to accumulate intense radioactive sources not only to treat illness but also to maintain an abundant supply for research. The existence in Paris at the Radium Institute of stock of grams of radium made a decisive contribution to the success of the experiments undertaken in the years around 1930. This work prepared the way for the discovery of the neutron by Sir James Chadwick and, above all, for the discovery in 1934 by Irene and Frédéric Joliot- Curie of artificial radioactivity. A few months after this discovery, Marie Curie died as a result of leukaemia caused by exposure to radiation. She had often carried test tubes containing radioactive isotopes in her pocket, remarking on the pretty blue-green light they gave off.

    Her contribution to physics had been immense, not only in her own work, the importance of which had been demonstrated by her two Nobel Prizes, but because of her influence on subsequent generations of nuclear physicists and chemists.

    Questions 1-6

    Do the following statements agree with the information given in Reading Passage 1?

    In boxes 1-6 on your answer sheet. write:

    • TRUE. if the statement agrees with the information
    • FALSE. if the statement contradicts the information
    • NOT GIVEN if there is no information on this
    1. Marie Curie’s husband was a joint winner of both Marla‘s Nobel Prizes.
    2. Marie became interested in science when she was a child.
    3. Marie was able to attend the Sorbonne because of her sister’s financial contribution.
    4. Marie stopped doing research for several years when her children were born.
    5. Marie took over the teaching position her husband had held.
    6. Marie‘s sister Bronia studied the medical uses of radioactivity.
    Question 7-13

    Complete the notes below.

    Choose ONE WORD from the passage for each answer.

    Write your answers in boxes 7-13 on your answer sheet.

    Marie Curie’s research on radioactivity

    • When uranium was discovered to be radioactive. Marie Curie found that the element called (7) …………………… had the same property.
    • Marie and Pierre Curie‘s research into the radioactivity of the mineral known as (8) …………………… led to the discovery of two new elements.
    • In 1911, Marie Curie received recognition for her work on the element (9) ……………………Marie and Irene Curie developed X-radiography which was used as a medical technique for (10) ……………………
    • Marie Curie saw the importance of collecting radioactive material both for research and for cases of (11) ……………………
    • The radioactive material stocked in Paris contributed to the discoveries in the 1930s of the (12) …………………… and of what was known as artificial radioactivity.
    • During her research. Marie Curio was exposed to radiation and as a result, she suffered from (13) ……………………

    Reading Passage 2

    Young Children’s Sense of Identity

    Young Children’s Sense of Identity IELTS Acade,oc Reading Passage 2 with answers and explanations.
    Part of the image by pexels.com
    1. A sense of ‘self’ develops in young children by degrees. The process can usefully be thought of in terms of the gradual emergence of two somewhat separate features: the self as a subject, and the self as an object. William James introduced the distinction in 1892, and contemporaries of his, such as Charles Cooley, added to the developing debate. Ever since then psychologists have continued building on the theory.
    2. According to James, a child’s first step on the road to self-understanding can be seen as the recognition that he or she exists. This is an aspect of the self that he labeled ‘self-as-subject’, and he gave it various elements. These included an awareness of one’s own agency (i.e. one’s power to act) and an awareness of one’s distinctiveness from other people. These features gradually emerge as infants explore their world and interact with caregivers. Cooley (1902) suggested that a lot of the self-as-subject was primarily concerned with being able to exercise power. He proposed that the earliest examples of this are an infant’s attempts to control physical objects, such as toys or his or her own limbs. This is followed by attempts to affect the behavior of other people. For example, infants learn that when they cry or smile someone responds to them.
    3. Another powerful source of information for infants about the effects they can have on the world around them is provided when others mimic them. Many parents spend a lot of time, particularly in the early months, copying their infant’s vocalizations and expressions in addition, young children enjoy looking in mirrors, where the movements they can see are dependent upon their own movements. This is not to say that infants recognize the reflection as their own image (a later development). However, Lewis and Brooks-Gunn (1979) suggest that infants’ developing understanding that the movements they see in the mirror are contingent ­on their own, leads to a growing awareness that they are distinct from other people. This is because they, and only they can change the reflection in the mirror.
    4. This understanding that children gain of themselves as active agents continue to develop in their attempts to co-operate with others in play. Drum (1988) points out that it is in such day-to-day relationships and interactions that the child’s understanding of his or herself emerges. Empirical investigations of the self-as-subject in young children are, however, rather scarce because of difficulties of communication: even if young infants can reflect on their experience, they certainly cannot express this aspect of the self directly.
    5. Once Children have acquired a certain level of self-awareness, they begin to place themselves in a whole series of categories, which together play such an important part in defining them uniquely as ‘themselves’. This second step in the development of a full sense of self is what James called the ‘self-as-object’. This has been seen by many to be the aspect of the self which is most influenced by social elements, since it is made up of social roles (such as student, brother; colleague) and characteristics which derive their meaning from comparison or interaction with other people (such as trustworthiness, shyness, sporting ability).
    6. Cooley and other researchers suggested a close connection between a person’s own understanding of their identity and other people’s understanding of it. Cooley believed that people build up their sense of identity from the reactions of others to them, and from the view, they believe others have of them. He called the self- as-object the ’looking-glass self’, since people come to see themselves as they are reflected in others. Mead (1934) went even further, and saw the self and the social world as inextricably bound together. The self is essentially a social structure, and ­it arises in social experience. It is impossible to conceive of a self-arising outside of social experience.’
    7. Lewis and Brooks-Gunn argued that an important developmental milestone is reached when children become able to recognize themselves visually without the support of seeing contingent movement. This recognition occurs around their second birthday. In one experiment, Lewis and Brooks-Gunn (1979) dabbed some red powder on the noses of children who were playing in front of a mirror, and then observed how often they touched their noses. The psychologists reasoned that if the children knew what they usually looked like, they would be surprised by the unusual red mark and would start touching it. On the other hand, they found that children of 15 to 18 months are generally not able to recognize themselves unless other cues such as movement are present.
    8. Finally perhaps the most graphic expressions of self-awareness, in general, can be seen in the displays of rage which are most common from 18 months to 3 years of age. In a longitudinal study of groups of three or four children, Bronson (1975) found that the intensity of the frustration and anger in their disagreements increased sharply between the ages of 1 and 2 years. Often, the children’s disagreements involved a struggle over a toy that none of them had played with before or after the tug-of-war: the children seemed to be disputing ownership rather than wanting to play with it. Although it may be less marked in other societies, the link between the sense of ’self’ and of ‘ownership’ is a notable feature of childhood in Western societies.
    Questions 14-19

    Reading Passage 2 has eight paragraphs, A-H.

    Which paragraph contains the following information?

    Write the correct letter A-H, in boxes 14-19 on your answer sheet.

    NB You may use any letter more than once.

    1. An account of the method used by researchers in a particular study
    2. The role of imitation in developing a sense of identity
    3. The age at which children can usually identity a static image of themselves
    4. A reason for the limitations of scientific research into ‘self- as-subject’.
    5. Reference to a possible link between culture and a particular form of behavior
    6. Examples of the wide range of features that contribute to the sense of ‘self-as-object’.
    Questions 14-19

    Look at the following findings (Questions 20-23) and the list oi researchers below.

    Match each finding with the correct researcher or researchers, A-E.

    Write the correct letter A-E, in boxes 20-23 on your answer sheet.

    1. A sense of identity can never be formed without relationships with other people.
    2. A child’s awareness of self is related to a sense of mastery over things and people.
    3. At a certain age, children’s sense of identity leads to aggressive behavior.
    4. Observing their own reflection contributes to children‘s self-awareness.

    List of Researchers

    1. James
    2. Cooley
    3. Lewis and Brooks-Gunn
    4. Mead
    5. Bronson
    Questions 24-26

    Complete the summary below

    Choose ONE WORD ONLY from the passage for each answer

    Write your answers in boxes 24-26 on your answer sheet

    How children acquire a sense of identity

    First, children come to realize that they can have an effect on the world around them, for example by handling objects. or causing the image to move when they face a (24)……………………….. This aspect of self-awareness is difficult to research directly, because of (25)………………………. problems. Secondly. children start to become aware of how they are viewed by others. One important stage in this process is the visual recognition of themselves which usually occurs when they reach the age of two. In Western societies at least, the development of self awareness is often linked to a sense of (26)…………………………… , and can lead to disputes.

    Reading Passage 3

    The Development of Museums

    The Development of Museums IELTS 9 Test 4 Reading Passage 3 with answers & explanation.
    Part of the image by pexels.com
    1. The conviction that historical relics provide infallible testimony about the past is rooted in the nineteenth and early twentieth centuries, when science was regarded as objective and value-free. As one writer observes: ‘Although it is now evident that artifacts are as easily altered as chronicles, public faith in their veracity endures: a tangible relic seems ipso facto real! Such conviction was, until recently, reflected in museum displays. Museums used to look — and some still do — much like storage rooms of objects packed together in showcases: good for scholars who wanted to study the subtle differences in design, but not for the ordinary visitor to whom it all looked alike. Similarly, the information accompanying the objects often made little sense to the lay visitor. The content and format of explanations dated back to a time when the museum was the exclusive domain of the scientific researcher.
    2. Recently, however, attitudes towards history and the way it should be presented have altered. The key word in heritage display is now ‘experience’ the more exciting the better and, if possible, involving all the senses. Good examples of this approach in the UK are the Jorvik Centre in York; the National Museum of Photography, Elm ­­and Television in Bradford; and the Imperial War Museum in London. In the US the trend emerged much earlier. Williamsburg has been a prototype for many heritage developments in other parts of the world. No one can predict where the process will end. On so-called heritage sites, the re-enactment of historical events is increasingly popular, and computers will soon provide virtual reality experiences, which will present visitors with a vivid image of the period of their choice, in which they themselves can act as if part of the historical environment. Such developments have been criticised as an intolerable vulgarisation, but the success of many historical theme parks and similar locations suggests that the majority of the public does not share this opinion.
    3. In a related development, the sharp distinction between museum and heritage sites on the one hand, and theme parks on the other is gradually evaporating. They already borrow ideas and concepts from one another. For example, museums have adopted storylines for exhibitions, sites have accepted ‘theming’ as a relevant tool, and theme parks are moving towards more authenticity and research-based presentations, in zoos, animals are no longer kept in cages, but in great spaces, either in the open air or in enormous greenhouses, such as the jungle and desert environments. In Burgers’ Zoo In Holland, this particular trend is regarded as one of the major developments in the presentation of natural history in the twentieth century.
    4. Theme parks are undergoing other changes, too, as they try to present more serious social and cultural issues, and move away from fantasy. This development is a response to market forces and, although museums and heritage sites have a special rather distinct role to fulfill, they are also operating in a very competitive environment, where visitors make choices on how and where to spend their free time. Heritage and museum experts do not have to invent stories and recreate historical environments to attract their visitors: their assets are already in place. However, exhibits must be both based on artefacts and facts as we know them, and attractively presented. Those who are professionally engaged in the art of interpreting history are thus in a difficult position, as they must steer a narrow course between the demands of ’evidence’ and ‘attractiveness especially given the increasing need in the heritage industry for income-generating activities.
    5. It could be claimed that in order to make everything in heritage more `real`, historical accuracy must be increasingly altered. For example, Pithecanthropus erectus is depicted in an Indonesian museum with Malay facial features, because this corresponds to public perceptions. Similarly, in the Museum of Natural History in Washington, Neanderthal man is shown making a dominant gesture to his wife. Such presentations tell us more about contemporary perceptions of the world than about our ancestors. There is one compensation, however, for the professionals who make these interpretations: If they did not provide the interpretation, visitors would do it for themselves based on their own ideas misconceptions and prejudices. And no matter how exciting the result, it would contain a lot more bias than the presentations provided by experts
    6. Human bias is inevitable, but another source of bias in the representation of history has to do with the transitory nature of the materials themselves. The simple fact is that not everything from history survives the historical process. Castles, palaces and cathedrals have a longer lifespan than the dwellings of ordinary people. The same applies to the furnishings and other contents of the premises. In a town like Leyden in Holland, which in the seventeenth century was occupied by approximately the same number of inhabitants as today, people lived within the walled town, an area more than five times smaller than modern Leyden. In most of the houses, several families lived together in circumstances beyond our imagination. Yet in museums, line period rooms give only an image of the lifestyle of the upper class of that era. No wonder that people who stroll around exhibitions are filled with nostalgia; the evidence in museums indicates that life was so much better in the past. This notion is induced by the bias in its representation in museums and heritage centers.
    Questions 27-30

    Reading Passage has six paragraphs, A-F.

    Choose the correct heading for paragraphs B-E from the list of headings below.

    Write the correct number, i-vii, in boxes 1-4 on your answer sheet.

    Example Answer

    Paragraph A answer V
    1. Paragraph B
    2. Paragraph C
    3. Paragraph D
    4. Paragraph E

    List of Headings

    1. Commercial pressures on people in charge
    2. Mixed views on current changes to museums
    3. Interpreting the facts to meet visitor expectations
    4. The international dimensionv Collections of factual evidence
    5. Fewer differences between public attractions
    6. Current reviews and suggestions
    Questions 31-36

    Choose the correct letter A, B, C or D.

    Write the correct letter in boxes 31-36 on your answer sheet.

    1. Compared with today’s museums those of the past
      1. did not present history in a detailed way.
      2. were not primarily intended for the public.
      3. were more clearly organized.
      4. preserved items with greater care.
    2. According to the writer, current trends in the heritage industry
      1. emphasize personal involvement.
      2. have their origins in York and London,
      3. rely on computer images.
      4. reflect minority tastes.
    3. The writer says that museums, heritage sites and theme parks
      1. often work in close partnership.
      2. try to preserve separate identities.
      3. have similar exhibits.
      4. are less easy to distinguish than before.
    4. The writer says that in preparing exhibits for museums, experts
      1. should pursue a single objective.
      2. have to do a certain amount of language translation.
      3. should be free from commercial constraints.
      4. have to balance conflicting priorities.
    5. In paragraph E. the writer suggests that some museum exhibits
      1. fail to match visitor expectations.
      2. are based on the false assumptions of professionals.
      3. reveal more about present beliefs than about the past.
      4. allow visitors to make more use of their imagination.
    6. The passage ends by noting that our view of history is biased because
      1. we fail to use our imagination.
      2. only very durable objects remain from the past.
      3. we tend to ignore things that displease us.
      4. museum exhibits focus too much on the local area.
    Questions 37-40

    Do the following statements agree with the information given in Reading Passage 3?

    In boxes 37-40 on your answer sheet, write

    • TRUE                           if the statement agrees with the information
    • FALSE                         if the statement contradicts the information
    • NOT GIVEN              if there is no information on this
    1. Consumers prefer theme parks which avoid serious issues.
    2. More people visit museums than theme parks.
    3. The boundaries of Leyden have changed little since the seventeenth century.
    4. Museums can give a false impression of how life used to be.
    Reading Passage 1 The Life & Work of Marie Curie Answers
    1. false
    2. not given
    3. true
    4. false
    5. true
    6. not given
    7. thorium
    8. pitchblende
    9. radium
    10. soldiers
    11. illness
    12. neutron
    13. leukemia
    Reading Passage 2 Young Children’s Sense of Identity Answers
    1. G
    2. C
    3. G
    4. D
    5. H
    6. E
    7. D
    8. B
    9. E
    10. C
    11. mirror
    12. communication
    13. ownership
    Reading Passage 3 The Development of Museums Answers
    1. ii
    2. vi
    3. i
    4. iii
    5. B
    6. A
    7. D
    8. D
    9. C
    10. B
    11. false
    12. not given
    13. false
    14. true
  • Cambridge IELTS 9 Academic Reading Test 3

    Cambridge IELTS 9 Academic Reading Test 3

    Reading Passage 1

    Attitudes to Language

    Attitudes to Language IELTS Reading Passage 1 with Answers and Explanations. Part of Cambridge IELTS 9 Academic Reading Test 3.
    Part of the Image by Pixabay

    It is not easy to be systematic and objective about language study. Popular linguistic debate regularly deteriorates into invective and polemic. Language belongs to everyone, so most people feel they have a right to hold an opinion about it. And when opinions differ, emotions can run high. Arguments can start as easily over minor points of usage as over major policies of linguistic education.

    Language, moreover, is a very public behaviour, so it is easy for different usages to be noted and criticised. No part of society or social behaviour is exempt: linguistic factors influence how we judge personality, intelligence, social status, educational standards, job aptitude, and many other areas of identity and social survival. As a result, it is easy to hurt, and to be hurt, when language use is unfeelingly attacked.

    In its most general sense, prescriptivism is the view that one variety of language has an inherently higher value than others, and that this ought to be imposed on the whole of the speech community. The view is propounded especially in relation to grammar and vocabulary, and frequently with reference to pronunciation. The variety which is favoured, in this account, is usually a version of the ‘standard’ written language, especially as encountered in literature, or in the formal spoken language which most closely reflects this style. Adherents to this variety are said to speak or write ‘correctly’; deviations from it are said to be ‘incorrect!

    All the main languages have been studied prescriptively, especially in the 18th century approach to the writing of grammars and dictionaries. The aims of these early grammarians were threefold: (a) they wanted to codify the principles of their languages, to show that there was a system beneath the apparent chaos of usage, (b) they wanted a means of settling disputes over usage, and (c) they wanted to point out what they felt to be common errors, in order to ‘improve’ the language. The authoritarian nature of the approach is best characterised by its reliance on ‘rules’ of grammar. Some usages are ‘prescribed,’ to be learnt and followed accurately; others are ‘proscribed,’ to be avoided. In this early period, there were no half-measures: usage was either right or wrong, and it was the task of the grammarian not simply to record alternatives, but to pronounce judgement upon them.

    These attitudes are still with us, and they motivate a widespread concern that linguistic standards should be maintained. Nevertheless, there is an alternative point of view that is concerned less with standards than with the facts of linguistic usage. This approach is summarised in the statement that it is the task of the grammarian to describe, not prescribe to record the facts of linguistic diversity, and not to attempt the impossible tasks of evaluating language variation or halting language change. In the second half of the 18th century, we already find advocates of this view, such as Joseph Priestley, whose Rudiments of English Grammar (1761) insists that ‘the custom of speaking is the original and only just standard of any language! Linguistic issues, it is argued, cannot be solved by logic and legislation. And this view has become the tenet of the modern linguistic approach to grammatical analysis.

    In our own time, the opposition between ‘descriptivists’ and ‘prescriptivists’ has often become extreme, with both sides painting unreal pictures of the other. Descriptive grammarians have been presented as people who do not care about standards, because of the way they see all forms of usage as equally valid. Prescriptive grammarians have been presented as blind adherents to a historical tradition. The opposition has even been presented in quasi-political terms – of radical liberalism vs elitist conservatism.

    Questions 1-8

    Do the following statements agree with the claims of the writer in Reading Passage 1?

    In boxes 1-8 in your answer sheet, write:

    • YES                                if the statement agrees with the claims of the writer
    • NO                                  if the statement contradicts the claims of the writer
    • NOT GIVEN               if it is impossible to say what the writer thinks about this
    1. There are understandable reasons why arguments occur about language.
    2. People feel more strongly about language education than about small differences in language usage.
    3. Our assessment of a person’s intelligence is affected by the way he or she uses language.
    4. Prescriptive grammar books cost a lot of money to buy in the 18th century.
    5. Prescriptivism still exists today.
    6. According to descriptivists it is pointless to try to stop language change.
    7. Descriptivism only appeared after the 18th century.
    8. Both descriptivists and prescriptivists have been misrepresented.
    Questions 9-12

    Complete the summary using the list of words, A-l, below.

    The language debate

    According to (9) ………………. there is only one correct form of language. Linguists who take this approach to language place great importance on grammatical (10) ……………………. Conversely, the view of (11) ……………….., such as Joseph Priestley, is that grammar should be based on (12) ………………….

    1. descriptivists                     
    2. language expert                   
    3. popular speech                           
    4. formal language
    5. evaluation                         
    6. rules                                         
    7. modern linguists                       
    8. prescriptivists
    9. change
    Question 13

    Choose the correct letter A. B, C or D.

    What is the writer’s purpose in Reading Passage?

    1. to argue in favour of a particular approach to writing dictionaries and grammar books
    2. to present a historical account of differing views of language
    3. to describe the differences between spoken and written language
    4. to show how a certain view of language has been discredited

    Reading Passage 2

    Tidal Power

    Tidal Power IELTS Reading Passage 2 with Answers and Explanations. Pracitse IELTS Training Online.
    Part of the Image by Pixabay

    A Operating on the same principle as wind turbines, the power in sea turbines comes from tidal currents which turn blades similar to ships’ propellers, but, unlike wind, the tides are predictable and the power input is constant. The technology raises the prospect of Britain becoming self-sufficient in renewable energy and drastically reducing its carbon dioxide emissions. If tide, wind and wave power are all developed, Britain would be able to close gas, coal and nuclear power plants and export renewable power to other parts of Europe. Unlike wind power, which Britain originally developed and then abandoned for 20 years allowing the Dutch to make it a major industry, undersea turbines could become a big export earner to island nations such as Japan and New Zealand.

    B Tidal sites have already been identified that will produce one sixth or more of the UK’s power – and at prices competitive with modern gas turbines and undercutting those of the already ailing nuclear industry. One site alone, the Pentland Firth, between Orkney and mainland Scotland, could produce 10% of the country’s electricity with banks of turbines under the sea, and another at Alderney in the Channel Islands three times the 1,200 megawatts of Britain’s largest and newest nuclear plant, Sizewell B, in Suffolk. Other sites identified include the Bristol Channel and the west coast of Scotland, particularly the channel between Campbeltown and Northern Ireland.

    C Work on designs for the new turbine blades and sites are well advanced at the University of Southampton’s sustainable energy research group. The first station is expected to be installed off Lynmouth in Devon shortly to test the technology in a venture jointly funded by the department of Trade and Industry and the European Union. AbuBakr Bahaj, in charge of the Southampton research, said: The prospects for energy from tidal currents are far better than from wind because the flows of water are predictable and constant. The technology for dealing with the hostile saline environment under the sea has been developed in the North Sea oil industry and much is already known about turbine blade design, because of wind power and ship propellers. There are a few technical difficulties, but I believe in the next five to ten years we will be installing commercial marine turbine farms.’ Southampton has been awarded £215,000 over three years to develop the turbines and is working with Marine Current Turbines, a subsidiary of IT power, on the Lynmouth project. EU research has now identified 106 potential sites for tidal power, 80% round the coasts of Britain. The best sites are between islands or around heavily indented coasts where there are strong tidal currents.

    D A marine turbine blade needs to be only one third of the size of a wind generator to produce three times as much power. The blades will be about 20 metres in diameter, so around 30 metres of water is required. Unlike wind power, there are unlikely to be environmental objections. Fish and other creatures are thought unlikely to be at risk from the relatively slow-turning blades. Each turbine will be mounted on a tower which will connect to the national power supply grid via underwater cables. The towers will stick out of the water and be lit, to warn shipping, and also be designed to be lifted out of the water for maintenance and to clean seaweed from the blades.

    E Dr Bahaj has done most work on the Alderney site, where there are powerful currents. The single undersea turbine farm would produce far more power than needed for the Channel Islands and most would be fed into the French Grid and be re-imported into Britain via the cable under the Channel.

    F One technical difficulty is cavitation, where low pressure behind a turning blade causes air bubbles. These can cause vibration and damage the blades of the turbines. Dr Bahaj said: ‘We have to test a number of blade types to avoid this happening or at least make sure it does not damage the turbines or reduce performance. Another slight concern is submerged debris floating into the blades. So far we do not know how much of a problem it might be. We will have to make the turbines robust because the sea is a hostile environment, but all the signs that we can do it are good.’

    Questions 14-17

    Reading Passage 2 has six paragraphs, A-F.

    Which paragraph contains the following information?

    NB You may use any letter more than once.

    1. the location of the first test site
    2. a way of bringing the power produced on one site back into Britain
    3. a reference to a previous attempt by Britain to find an alternative source of energy
    4. mention of the possibility of applying technology from another industry
    Questions 18-22

    Choose FIVE Letters A-J.

    Which FIVE of the following claims about tidal power are made by the writer?

    1. It is a more reliable source of energy than wind power.
    2. It would replace all other forms of energy in Britain.
    3. Its introduction has come as a result of public pressure.
    4. It would cut down on air pollution.
    5. It could contribute to the closure of many existing power stations ln Britain.
    6. It could be a means of increasing national income.
    7. It could face a lot of resistance from other fuel industries.
    8. It could be sold more cheaply than any other type of fuel.
    9. It could compensate for the shortage of inland sites for energy production.
    10. It is best produced in the vicinity of coastlines with particular features.
    Questions 23-26

    Label the diagram below.

    Choose NO MORE THAN TWO WORDS from the passage for each answer.

    An Undersea Turbine

    Questions 23-26 Tidal power Reading Passage 2 Figure.

    Reading Passage 3

    Information Theory – The Bid Idea

    Information Theory – The Bid Idea Reading Passage 3 with Answers and Explanations. Cambridge IELTS 9 Test 3 Practice online.
    Part of the Image by Pixabay

    A In April 2002 an event took place which demonstrated one of the many applications of information theory. The space probe, Voyager I, launched in 1977, had sent back spectacular images of Jupiter and Saturn and then soared out of the Solar System on a one-way mission to the stars. After 25 years of exposure to the freezing temperatures of deep space, the probe was beginning to show its age. Sensors and circuits were on the brink of failing and NASA experts realised that they had to do something or lose contact with their probe forever. The solution was to get a message to Voyager I to instruct it to use spares to change the failing parts. With the probe 12 billion kilometres from Earth, this was not an easy task. By means of a radio dish belonging to NASA’s Deep Space Network, the message was sent out into the depths of space. Even travelling at the speed of light, it took over 11 hours to reach its target, far beyond the orbit of Pluto. Yet, incredibly, the little probe managed to hear the faint call from its home planet, and successfully made the switchover.

    B It was the longest-distance repair job in history, and a triumph for the NASA engineers. But it also highlighted the astonishing power of the techniques developed by American communications engineer Claude Shannon, who had died just a year earlier. Born in 1916 in Petoskey, Michigan, Shannon showed an early talent for maths and for building gadgets, and made breakthroughs in the foundations of computer technology when still a student. While at Bell Laboratories, Shannon developed information theory, but shunned the resulting acclaim. In the 1940s, he single-handedly created an entire science of communication which has since inveigled its way into a host of applications, from DVDs to satellite communications to bar codes – any area, in short, where data has to be conveyed rapidly yet accurately.

    C This all seems light years away from the down-to-earth uses Shannon originally had for his work, which began when he was a 22-year-old graduate engineering student at the prestigious Massachusetts Institute of Technology in 1939. He set out with an apparently simple aim: to pin down the precise meaning of the concept of ‘information’. The most basic form of information, Shannon argued, is whether something is true or false – which can be captured in the binary unit, or ‘bit’, of the form 1 or 0. Having identified this fundamental unit, Shannon set about defining otherwise vague ideas about information and how to transmit it from place to place. In the process he discovered something surprising: it is always possible to guarantee information will get through random interference – ‘noise’ – intact.

    D Noise usually means unwanted sounds which interfere with genuine information. Information theory generalises this idea via theorems that capture the effects of noise with mathematical precision. In particular, Shannon showed that noise sets a limit on the rate at which information can pass along communication channels while remaining error-free. This rate depends on the relative strengths of the signal and noise travelling down the communication channel, and on its capacity (its ‘bandwidth’). The resulting limit, given in units of bits per second, is the absolute maximum rate of error-free communication given signal strength and noise level. The trick, Shannon showed, is to find ways of packaging up – ‘coding’ – information to cope with the ravages of noise, while staying within the information-carrying capacity – ‘bandwidth’ – of the communication system being used.

    E Over the years scientists have devised many such coding methods, and they have proved crucial in many technological feats. The Voyager spacecraft transmitted data using codes which added one extra bit for every single bit of information; the result was an error rate of just one bit in 10,000 – and stunningly clear pictures of the planets. Other codes have become part of everyday life – such as the Universal Product Code, or bar code, which uses a simple error-detecting system that ensures supermarket check-out lasers can read the price even on, say, a crumpled bag of crisps. As recently as 1993, engineers made a major breakthrough by discovering so-called turbo codes – which come very close to Shannon’s ultimate limit for the maximum rate that data can be transmitted reliably, and now play a key role in the mobile videophone revolution.

    F Shannon also laid the foundations of more efficient ways of storing information, by stripping out superfluous (‘redundant’) bits from data which contributed little real information. As mobile phone text messages like ‘I CN C U’ show, it is often possible to leave out a lot of data without losing much meaning. As with error correction, however, there’s a limit beyond which messages become too ambiguous. Shannon showed how to calculate this limit, opening the way to the design of compression methods that cram maximum information into the minimum space.

    Questions 27-32

    Reading Passage 3 has six paragraphs, A-F.

    Which paragraph contains the following information?

    1. an explanation of the factors affecting the transmission of information
    2. an example of how unnecessary information can be omitted
    3. a reference to Shannon`s attitude to fame
    4. details of a machine capable of interpreting incomplete information
    5. a detailed account of an incident involving information theory
    6. a reference to what Shannon initially intended to achieve in his research
    Questions 33-37

    Complete the notes below.

    Choose NO MORE THAN TWO WORDS from the passage for each answer

    The Voyager l Space Probe

    The probe transmitted pictures of both (33) ……………….,and ……………. , then left the (34) ……………. The freezing temperatures were found to have a negative effect on parts of the space probe. Scientists feared that both the (35)……………….. and ………………… were about to stop working. The only hope was to tell the probe to replace them with (36)…………………….. – but distance made communication with the probe difficult. A (37)………………….. was used to transmit the message at the speed of light. The message was picked up by the probe and the switchover took place.

    Questions 38-40

    Do the following statements agree with the information given in Reading Passage 3?

    In boxes 38-40 on your answer sheet write

    • TRUE                      if the statement agrees with the information
    • FALSE                    if the statement contradicts the information
    • NOT GIVEN         if there is no information on this
    1. The concept of describing something as true or false was the starting point for Shannon in his attempts to send messages over distances.
    2. The amount of information that can be sent in a given time period is determined with reference to the signal strength and noise level.
    3. Products have now been developed which can convey more information than Shannon had anticipated as possible.
    Reading Passage 1 Attitudes to Language Answers
    1. yes
    2. no
    3. yes
    4. not given
    5. yes
    6. yes
    7. no
    8. yes
    9. H
    10. F
    11. A
    12. C
    13. B
    Reading Passage 2 Tidal Power Answers
    1. C
    2. E
    3. A
    4. C
    5. A
    6. D
    7. E
    8. F
    9. J
    10. maintenance
    11. slow (turning)
    12. low pressure
    13. cavitation
    Reading Passage 3 Information Theory – The Bid Idea Answers
    1. D
    2. F
    3. B
    4. E
    5. A
    6. C
    7. jupiter and saturn
    8. solar system
    9. sensors and circuits
    10. spares
    11. radio dish
    12. true
    13. true
    14. false