Actual Test 3 - Reading Test 6 With Practice Test, Answers And Explanation
Luyện tập đề IELTS Online Test Actual Test 3 - Reading Test 6 được lấy từ cuốn sách Actual Test 3 với trải nghiệm thi IELTS trên máy và giải thích đáp án chi tiết bằng Linearthinking, kèm answer key và list từ vựng IELTS cần học trong bài đọc.
Actual Test 3 - Reading Test 6 With Practice Test, Answers And Explanation
Passage
❓ Câu hỏi passage 1
Question 1 - 7
Do the following statements agree with the information given in the Reading Passage?
TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN if it is impossible to say what the writer thinks about this
1
‘The last man who knew everything’ has also been claimed to other people.
2
All Young’s articles were published in Encyclopedia Britannica.
3
Like others, Young wasn’t so brilliant when growing up.
4
Young’s talent as a doctor surpassed his other skills.
5
Young’s advice was sought by people responsible for local and national issues.
6
Young took part in various social pastimes.
7
Young suffered from a disease in his later years.
Question 8 - 13
Answer the questions below.
Choose NO MORE THAN THREE WORDS AND/OR A NUMBER from the passage for each answer.
8
How many life stories did Young write for the Encyclopedia Britannica?
9
What aspect of scientific research did Young focus on in his first academic paper?
10
What name did Young introduce to refer to a group of languages?
11
Who inspired Young to start his medical studies?
12
Where did Young get a teaching position?
13
What contribution did Young make to London?
Passage
❓ Câu hỏi passage 2
Question 14 - 18
Reading Passage has six paragraphs, A-F.
Which paragraph contains the following information?
14
The example of a research on building weather prediction for agriculture
15
An explanation of how Antarctic sea ice brings back oceans’ vitality
16
The description of a food chain that influences animals’ living pattern
17
The reference of an extreme temperature and a cold wind in Antarctica
18
The reference of how Antarctica was once thought to be a forgotten and insig-nificant continent
Question 19 - 21
Match the natural phenomenon with the correct determined factor.
Globally, Antarctica’s massive size and would influence our climate.
circulated under contributory force from wind blowing from the west.
The ocean temperature and index based on air pressure can help predict in Australia.
A
Antarctic Circumpolar Current (ACC)
B
katabatic winds
C
rainfall
D
temperature
E
glaciers
F
pressure
Question 22 - 26
Choose the correct letterA, B, C or D.
22
In paragraph B, the author intends to
A
show Antarctica has been a central topic of global warming discussion in Mass media.
B
illustrate how its huge sea ice brings food to millions of lives in the world.
C
emphasise the significance of Antarctica to the global climate and ocean currents.
D
illustrate the geographical location of Antarctica as the central spot on Earth.
23
Why should Australian farmers keep an eye on the Antarctic ocean temperature?
A
It can help farmers reduce their economic loss.
B
It allows for recovery of grassland lost to overgrazing.
C
It can help to prevent animals from dying
D
It enables astronauts to have a clear view of the Antarctic continent.
24
The decrease in the number of whales and seabirds is due to
A
killer whales’ activity around Antarctica.
B
the correlation between sea birds’ migration and the salinity level of the ocean.
C
the lower productivity of food source resulting from less sea ice.
D
the failure of seals to produce babies.
25
What is the final effect of the katabatic winds?
A
Increasing the moving speed of ocean current
B
Increasing the salt level near ocean surface
C
Bringing fresh ice into the oceans
D
Piling up the mountainous ice cap respected by mariners
26
What factor drives Antarctic water to move beyond the continental shelf?
A
The increase of salt and density of the water
B
The decrease of salt and density of the water
C
The rising temperature due to global warming
D
The melting of fresh ice into the ocean
Passage
❓ Câu hỏi passage 3
Question 27 - 34
Reading Passage has nine paragraphs, A-I.
Which paragraph contains the following information?
NB You may use any letter more than once.
27
the contrast between the nature of personal judgment and the nature of doctor ’s diagnosis
28
a reference of culture about pressure
29
sick leave will not be permitted without professional diagnosis
30
how doctors’ opinions are regarded in the society
31
the illness of patients can become part of new knowledge
32
a description of knowledge drawn from non-specialised sources other than personal knowledge
33
an example of collective judgment from personal experience and professional doctor
34
a reference that some people do not realise they are ill
Question 35 - 40
Complete the notes below. Choose NO MORE THAN THREE WORDS from the passage for each answer.
Source of knowledge
Examples
Personal experience
Symptoms of a
35
and tirednessDoctor's measurement by taking
36
and temperatureCommon judgment from
37
around you
Scientific evidence
Medical knowledge from the general
38
e.g. doctor’s medical
39
Examine the medical hypothesis with the previous drill and
40
DOL IELTS Đình Lực
13/01/2023
📖 Bài đọc passage 1
Thomas Young The Last True Know-It-All
Thomas Young (1773-1829) contributed 63 articles to the Encyclopedia Britannica, including 46 biographical entries (mostly on scientists and classicists) and substantial essays on "Bridge," "Chromatics," "Egypt," "Languages" and "Tides". Was someone who could write authoritatively about so many subjects a polymath, a genius or a dilettante? In an ambitious new biography, Andrew Robinson argues that Young is a good contender for the epitaph "the last man who knew everything." Young has competition, however: The phrase, which Robinson takes for his title, also serves as the subtitle of two other recent biographies: Leonard Warren's 1998 life of paleontologist Joseph Leidy (1823-1891) and Paula Findlen's 2004 book on Athanasius Kircher (1602-1680), another polymath.
Young, of course, did more than write encyclopedia entries. He presented his first paper to the Royal Society of London at the age of 20 and was elected a Fellow a week after his 21st birthday. In the paper, Young explained the process of human eye accommodation — on how the eye focuses properly on objects at varying distances. Young hypothesised that this was achieved by changes in the shape of the lens. Young also theorised that light traveled in waves and ho believed that, to account for the ability to see in color, there must be three receptors in the eye corresponding to the three "principal colors" to which the retina could respond: red, green, violet. All these hypotheses Were subsequently proved to be correct.
Later in his life, when he was in his forties, Young was instrumental in cracking the code that unlocked the unknown script on the Rosetta Stone, a tablet that was "found" in Egypt by the Napoleonic army in 1799. The stone contains text in three alphabets: Greek, something unrecognisable and Egyptian hieroglyphs. The unrecognisable script is now known as demotic and, as Young deduced, is related directly to hieroglyphic. His initial work on this appeared in his Britannica entry on Egypt. In another entry, he coined the term Indo-European to describe the family of languages spoken throughout most of Europe and northern India. These are the landmark achievements of a man who was a child prodigy and who, unlike many remarkable children, did not disappear into oblivion as an adult.
Born in 1773 in Somerset in England, Young lived from an early age with his maternal grandfather, eventually leaving to attend boarding school. He had devoured books from the age of two, and through his own initiative he excelled at Latin, Greek, mathematics and natural philosophy. After leaving school, he was greatly encouraged by his mother's uncle, Richard Brocklesby, a physician and Fellow of the Royal Society. Following Brocklesby's lead, Young decided to pursue a career in medicine. He studied in London, following the medical circuit, and then moved on to more formal education in Edinburgh, Gottingen and Cambridge. After completing his medical training at the University of Cambridge in 1808, Young set up practice as a physician in London. He soon became a Fellow of the Royal College of Physicians and a few years later was appointed physician at St. George's Hospital.
Young's skill as a physician, however, did not equal his skill as a scholar of natural philosophy or linguistics. Earlier, in 1801, he had been appointed to a professorship of natural philosophy at the Royal Institution, where he delivered as many as 60 lectures in a year. These were published in two volumes in 1807. In 1804 Young had become secretary to the Royal Society, a post he would hold until his death. His opinions were sought on civic and national matters, such as the introduction of gas lighting to London and methods of ship construction. From 1819 he was superintendent of the Nautical Almanac and secretary to the Board of Longitude. From 1824 to 1829 he was physician to and inspector of calculations for the Palladian Insurance Company. Between 1816 and 1825 he contributed his many and various entries to the Encyclopedia Britannica, and throughout his career he authored numerous books, essays and papers.
Young is a perfect subject for a biography — perfect, but daunting. Few men contributed so much to so many technical fields. Robinson's aim is to introduce non-scientists to Young's work and life. He succeeds, providing clear expositions of the technical material (especially that on optics and Egyptian hieroglyphs). Some readers of this book will, like Robinson, find Young's accomplishments impressive; others will see him as some historians have —as a dilettante. Yet despite the rich material presented in this book, readers will not end up knowing Young personally. We catch glimpses of a playful Young, doodling Greek and Latin phrases in his notes on medical lectures and translating the verses that a young lady had written on the walls of a summerhouse into Greek elegiacs. Young was introduced into elite society, attended the theatre and learned to dance and play the flute. In addition, he was an accomplished horseman. However, his personal life looks pale next to his vibrant career and studies.
Young married Eliza Maxwell in 1804, and according to Robinson, "their marriage was a happy one and she appreciated his work," Almost all we know about her is that she sustained her husband through some rancorous disputes about optics and that she worried about money when his medical career was slow to take off. Very little evidence survives about the complexities of Young's relationships with his mother and father. Robinson does not credit them, or anyone else, with shaping Young's extraordinary mind. Despite the lack of details concerning Young's relationships, however, anyone interested in what it means to be a genius should read this book.
🔥 Đáp án & giải thích 1
1
True
Giải thích chi tiết
Hiểu câu hỏi: ‘The last man who knew everything’ has also been claimed to other people
=> Câu 'The last man...' cũng được trao cho những người khác
Áp dụng Linearthinking để nắm main idea:
1 Andrew Robinson argues that Young is a good contender for the epitaph "the last man who knew everything."
2 Young has competition , however : The phrase , also serves as the subtitle of two other recent biographies
=> Câu 1 cho biết Young là ứng cứ viên cho câu 'the last man who knew everything'
=> Câu 2 nói Young cũng phải cạnh tranh - câu nói này cũng được trao cho 2 người khác
=> 1 + 2: Câu 'the last man...' không chỉ dành cho mình Young - mà cho người khác nữa
A. A little over a century ago, men of the ilk of Scott, Shackleton and Mawson battled against Antarctica’s blizzards, cold and deprivation. In the name of Empire and in an age of heroic deeds they created an image of Antarctica that was to last well into the 20th century—an image of remoteness, hardship, bleakness and isolation that was the province of only the most courageous of men. The image was one of a place removed from everyday reality, of a place with no apparent value to anyone.
B
B.
As we enter the 21st century, our perception of Antarctica has changed. Although physically Antarctica is no closer and probably no warmer, and to spend time there still demands a dedication not seen in ordinary life, the continent and its surrounding ocean are increasingly seen to be an integral part of Planet Earth, and a key component in the Earth System. Is this because the world seems a little smaller these days, shrunk by TV and tourism, or is it because Antarctica really does occupy a central spot on Earth’s mantle? Scientific research during the past half century has revealed—and continues to reveal—that Antarctica's great mass and low temperature exert a major influence on climate and ocean circulation, factors which influence the lives of millions of people all over the globe.
C
Antarctica was not always cold. The slow break-up of the super-continent Gondwana with the northward movements of Africa, South America, India and Australia eventually created enough space around Antarctica for the development of an Antarctic Circumpolar Current (ACC), that flowed from west to east under the influence of the prevailing westerly winds. Antarctica cooled, its vegetation perished, glaciation began and the continent took on its present-day appearance. Today the ice that overlies the bedrock is up to 4km thick, and surface temperatures as low as -89.2deg C have been recorded. The icy blast that howls over the ice cap and out to sea—the so-called katabatic wind—can reach 300 km/hr, creating fearsome wind-chill effects,
D
Out of this extreme environment come some powerful forces that reverberate around the world. The Earth’s rotation, coupled to the generation of cells of low pressure off the Antarctic coast, would allow Astronauts a view of Antarctica that is as beautiful as it is awesome. Spinning away to the northeast, the cells grow and deepen, whipping up the Southern Ocean into the mountainous seas so respected by mariners. Recent work is showing that the temperature of the ocean may be a better predictor of rainfall in Australia than is the pressure difference between Darwin and Tahiti—the Southern Oscillation Index. By receiving more accurate predictions, graziers in northern Queensland are able to avoid overstocking in years when rainfall will be poor. Not only does this limit their losses but it prevents serious pasture degradation that may take decades to repair. CSIRO is developing this as a prototype forecasting system, but we can confidently predict that as we know more about the Antarctic and Southern Ocean we will be able to enhance and extend our predictive ability.
E
The ocean’s surface temperature results from the interplay between deep-water temperature, air temperature and ice. Each winter between 4 and 19 million square km of sea ice form, locking up huge quantities of heat close to the continent. Only now can we start to unravel the influence of sea ice on the weather that is experienced in southern Australia. But in another way the extent of sea ice extends its influence far beyond Antarctica. Antarctic krill—the small shrimp-like crustaceans that are the staple diet for baleen whales, penguins, some seals, flighted sea birds and many fish—breed well in years when sea ice is extensive and poorly when it is not. Many species of baleen whales and flighted sea birds migrate between the hemispheres and when the krill are less abundant they do not thrive.
F
The circulatory system of the world’s oceans is like a huge conveyor belt, moving water and dissolved minerals and nutrients from one hemisphere to the other, and from the ocean's abyssal depths to the surface. The ACC is the longest current in the world, and has the largest flow. Through it, the deep flows of the Atlantic, Indian and Pacific Oceans are joined to form part of a single global thermohaline circulation, During winter, the howling katabatics sometimes scour the ice off patches of the sea's surface leaving large ice-locked lagoons, or ’polynyas'. Recent research has shown that as fresh sea ice forms, it is continuously stripped away by the wind and may be blown up to 90km in a single day. Since only fresh water freezes into ice, the water that remains becomes increasingly salty and dense, sinking until it spills over the continental shelf. Cold water carries more oxygen than warm water, so when it rises, well into the northern hemisphere, it reoxygenates and revitalises the ocean. The state of the northern oceans, and their biological productivity, owe much to what happens in the Antarctic.
🔥 Đáp án & giải thích 2
14
D
Giải thích chi tiết
Đối với dạng Matching Information này bạn nên để đến cuối khi đã nắm được đại ý của bài đọc rồi hẵng làm nhé
=> Như vậy sẽ tìm được thông tin nhanh hơn
Step 1: Hiểu câu hỏi + Imagine paraphrase
'weather prediction' -> nghĩ về phần thông tin nói về việc dự báo thời những vấn đề liên quan đến thời tiết (lượng mưa, nhiệt độ, gió,...)
'agriculture' -> tìm những thông tin liên quan tới nông nghiệp
Step 2: Tìm thứ imagine + xác định info
'weather prediction' -> predictor of rainfall + predictions + forecasting system
'agriculture' -> graziers + overstocking
=> Thông tin được tìm thấy ở đoạn D
Áp dụng Linearthinking để nắm main idea và confirm đáp án:
1 Recent work is showing that the temperature of the ocean may be a better predictor of rainfall
2 By receiving more accurate predictions , graziers are able to avoid overstocking
3 Not only does this limit their losses but it prevents serious pasture degradation
4 CSIRO is developing this as a prototype forecasting system
=> Câu 1 cho biết có thể dựa vào 'ocean temperature' để dự đoán thời tiết
=> Câu 2 + 3 nói về các lợi ích cho 'graziers' (người chăn nuôi động vật ăn cỏ) -> lợi ích cho nông nghiệp
=> Câu 4 cho biết đang phát triển một hệ thống dự báo thời tiết
>>> Main idea: đoạn này chủ yếu nói về việc dự đoán thời tiết và mối liên hệ của nó với 'agriculture'
A. What counts as knowledge? What do we mean when we say that we know something? What is the status of different kinds of knowledge? In order to explore those questions we are going to focus on one particular area of knowledge medicine.
B
B. How do you know when you are ill? This may seem to be an absurd question. You know you are ill because you feel ill; your body tells you that you are ill. You may know that you feel pain or discomfort but knowing you are ill is a bit more complex. At times, people experience the symptoms of illness, but in fact they are simply tired or overworked or they may just have a hangover. At other times, people may be suffering from a disease and fail to be aware of the illness until it has reached a late stage in its development. So how do we know we are ill, and what counts as knowledge?
C
Think about this example. You feel unwell. You have a bad cough and always seem to be tired. Perhaps it could be stress at work, or maybe you should give up smoking. You feel worse. You visit the doctor who listens to your chest and heart, takes your temperature and blood pressure, and then finally prescribes antibiotics for your cough.
D
Things do not improve but you struggle on thinking you should pull yourself together, perhaps things will ease off at work soon. A return visit to your doctor shocks you. This time the doctor, drawing on yours of training and experience, diagnoses pneumonia. This means that you will need bed rest and a consider able time off work. The scenario is transformed. Although you still have the same symptoms, you no longer think that these are caused by pressure at work. You now have proof that you are ill. This is the result of the combination of your own subjective experience and the diagnosis of someone who has the stains of a medical expert. You have a medically authenticated diagnosis and it appears that you are seriously ill; you know you are ill and have evidence upon which to base this knowledge.
E
This scenario shows many different sources of knowledge. For example, you decide to consult the doctor in the first place because you feel unwell - this is personal knowledge about your own body. However, the doctor's expert diagnosis is based on experience and training, with sources of knowledge as diverse as other experts, laboratory reports, medical textbooks and yours of experience.
F
One source of knowledge is the experience of our own bodies; the personal knowledge we have of changes that might be significant, as well as the subjective experience of pain and physical distress. These experiences are mediated by other forms of knowledge such as the words we have available to describe our experience and the common sense of our families and friends as well as that drown from popular culture. Over the past decade, for example, Western culture has seen a significant emphasis on stress-related illness in the media. Reference to being ‘stressed out' has become a common response in daily exchanges in the workplace and has become part of popular common-sense knowledge. It is thus not surprising that we might seek such an explanation of physical symptoms of discomfort.
G
We might also rely on the observations of others who know us. Comments from friends and family such as ‘you do look ill' or 'that's a bad cough' might be another source of knowledge. Complementary health practices, such as holistic medicine, produce their own sets of knowledge upon which we might also draw in deciding the nature and degree of our ill health and about possible treatments.
H
Perhaps the most influential and authoritative source of knowledge is the medical knowledge provided by the general practitioner. We expect the doctor to have access to expert knowledge. This is socially sanctioned. It would not be acceptable to notify our employer Unit we simply felt too unwell to turn up for work or that our faith healer, astrologer, therapist or even our priest thought it was not a good idea. We need an expert medical diagnosis in order to obtain the necessary certificate we need to be off work for more than the statutory self-certification period. The knowledge of the medical sciences is privileged in this respect in contemporary Western culture. Medical practitioners are also seen as having the required expert knowledge that permits then legally to pre-scribe drugs and treatment to which patients would not. otherwise have access. However there is a range of different knowledge upon which we draw when making decisions about our own state of health.
I
However, there is more than existing knowledge in this little story; new knowledge is constructed within it. Given the doctor's medical training and background, she may hypothesise 'is this now pneumonia?' and then proceed to look for evidence about it. She will use observations and instruments to assess the evidence and-critically-interpret it in the light of her training and new experience both for you and for the doctor. This will then be added to the doctor's medical knowledge and may help in future diagnosis of pneumonia.
🔥 Đáp án & giải thích 3
27
E
Giải thích chi tiết
Đối với dạng Matching Information này bạn nên để đến cuối khi đã nắm được đại ý của bài đọc rồi hẵng làm nhé
=> Như vậy sẽ tìm được thông tin nhanh hơn
Step 1: Hiểu câu hỏi + Imagine paraphrase
'the contrast' -> tìm những từ chỉ sự tương phản
'nature of personal judgment' -> nghĩ về việc bản thân tự nhận xét điều gì đó
'the nature of doctor’s diagnosis' -> tìm thông tin về việc chuẩn đoán của bác sĩ
Step 2: Tìm thứ imagine + xác định info
'the contrast' -> 'however' (từ nối chỉ sự tương phản)
'nature of personal judgment' -> personal knowledge about your own body
'the nature of doctor’s diagnosis' -> the doctor's expert diagnosis
=> Tìm được thông tin ở đoạn E
Áp dụng Linearthinking để nắm main idea và confirm đáp án:
1 you decide to consult the doctor because you feel unwell - this is personal knowledge about your own body.
2However, the doctor's expert diagnosis is based on experience and training
=> Ta thấy từ nối 'however' được dùng để so sánh 'personal judgement' với 'doctor's diagnosis'
Thomas Young (1773-1829) contributed 63 articles to the Encyclopedia Britannica, including 46 biographical entries (mostly on scientists and classicists) and substantial essays on "Bridge," "Chromatics," "Egypt," "Languages" and "Tides". Was someone who could write authoritatively about so many subjects a polymath, a genius or a dilettante? In an ambitious new biography, Andrew Robinson argues that Young is a good contender for the epitaph "the last man who knew everything." Young has competition, however: The phrase, which Robinson takes for his title, also serves as the subtitle of two other recent biographies: Leonard Warren's 1998 life of paleontologist Joseph Leidy (1823-1891) and Paula Findlen's 2004 book on Athanasius Kircher (1602-1680), another polymath.
Young, of course, did more than write encyclopedia entries. He presented his first paper to the Royal Society of London at the age of 20 and was elected a Fellow a week after his 21st birthday. In the paper, Young explained the process of human eye accommodation — on how the eye focuses properly on objects at varying distances. Young hypothesised that this was achieved by changes in the shape of the lens. Young also theorised that light traveled in waves and ho believed that, to account for the ability to see in color, there must be three receptors in the eye corresponding to the three "principal colors" to which the retina could respond: red, green, violet. All these hypotheses Were subsequently proved to be correct.
Later in his life, when he was in his forties, Young was instrumental in cracking the code that unlocked the unknown script on the Rosetta Stone, a tablet that was "found" in Egypt by the Napoleonic army in 1799. The stone contains text in three alphabets: Greek, something unrecognisable and Egyptian hieroglyphs. The unrecognisable script is now known as demotic and, as Young deduced, is related directly to hieroglyphic. His initial work on this appeared in his Britannica entry on Egypt. In another entry, he coined the term Indo-European to describe the family of languages spoken throughout most of Europe and northern India. These are the landmark achievements of a man who was a child prodigy and who, unlike many remarkable children, did not disappear into oblivion as an adult.
Born in 1773 in Somerset in England, Young lived from an early age with his maternal grandfather, eventually leaving to attend boarding school. He had devoured books from the age of two, and through his own initiative he excelled at Latin, Greek, mathematics and natural philosophy. After leaving school, he was greatly encouraged by his mother's uncle, Richard Brocklesby, a physician and Fellow of the Royal Society. Following Brocklesby's lead, Young decided to pursue a career in medicine. He studied in London, following the medical circuit, and then moved on to more formal education in Edinburgh, Gottingen and Cambridge. After completing his medical training at the University of Cambridge in 1808, Young set up practice as a physician in London. He soon became a Fellow of the Royal College of Physicians and a few years later was appointed physician at St. George's Hospital.
Young's skill as a physician, however, did not equal his skill as a scholar of natural philosophy or linguistics. Earlier, in 1801, he had been appointed to a professorship of natural philosophy at the Royal Institution, where he delivered as many as 60 lectures in a year. These were published in two volumes in 1807. In 1804 Young had become secretary to the Royal Society, a post he would hold until his death. His opinions were sought on civic and national matters, such as the introduction of gas lighting to London and methods of ship construction. From 1819 he was superintendent of the Nautical Almanac and secretary to the Board of Longitude. From 1824 to 1829 he was physician to and inspector of calculations for the Palladian Insurance Company. Between 1816 and 1825 he contributed his many and various entries to the Encyclopedia Britannica, and throughout his career he authored numerous books, essays and papers.
Young is a perfect subject for a biography — perfect, but daunting. Few men contributed so much to so many technical fields. Robinson's aim is to introduce non-scientists to Young's work and life. He succeeds, providing clear expositions of the technical material (especially that on optics and Egyptian hieroglyphs). Some readers of this book will, like Robinson, find Young's accomplishments impressive; others will see him as some historians have —as a dilettante. Yet despite the rich material presented in this book, readers will not end up knowing Young personally. We catch glimpses of a playful Young, doodling Greek and Latin phrases in his notes on medical lectures and translating the verses that a young lady had written on the walls of a summerhouse into Greek elegiacs. Young was introduced into elite society, attended the theatre and learned to dance and play the flute. In addition, he was an accomplished horseman. However, his personal life looks pale next to his vibrant career and studies.
Young married Eliza Maxwell in 1804, and according to Robinson, "their marriage was a happy one and she appreciated his work," Almost all we know about her is that she sustained her husband through some rancorous disputes about optics and that she worried about money when his medical career was slow to take off. Very little evidence survives about the complexities of Young's relationships with his mother and father. Robinson does not credit them, or anyone else, with shaping Young's extraordinary mind. Despite the lack of details concerning Young's relationships, however, anyone interested in what it means to be a genius should read this book.
has competition
however
The phrase
also serves
as the subtitle of
two other recent biographies
As we enter the 21st century, our perception of Antarctica has changed. Although physically Antarctica is no closer and probably no warmer, and to spend time there still demands a dedication not seen in ordinary life, the continent and its surrounding ocean are increasingly seen to be an integral part of Planet Earth, and a key component in the Earth System. Is this because the world seems a little smaller these days, shrunk by TV and tourism, or is it because Antarctica really does occupy a central spot on Earth’s mantle? Scientific research during the past half century has revealed—and continues to reveal—that Antarctica's great mass and low temperature exert a major influence on climate and ocean circulation, factors which influence the lives of millions of people all over the globe.
C. Antarctica was not always cold. The slow break-up of the super-continent Gondwana with the northward movements of Africa, South America, India and Australia eventually created enough space around Antarctica for the development of an Antarctic Circumpolar Current (ACC), that flowed from west to east under the influence of the prevailing westerly winds. Antarctica cooled, its vegetation perished, glaciation began and the continent took on its present-day appearance. Today the ice that overlies the bedrock is up to 4km thick, and surface temperatures as low as -89.2deg C have been recorded. The icy blast that howls over the ice cap and out to sea—the so-called katabatic wind—can reach 300 km/hr, creating fearsome wind-chill effects,
D. Out of this extreme environment come some powerful forces that reverberate around the world. The Earth’s rotation, coupled to the generation of cells of low pressure off the Antarctic coast, would allow Astronauts a view of Antarctica that is as beautiful as it is awesome. Spinning away to the northeast, the cells grow and deepen, whipping up the Southern Ocean into the mountainous seas so respected by mariners. Recent work is showing that the temperature of the ocean may be a better predictor of rainfall in Australia than is the pressure difference between Darwin and Tahiti—the Southern Oscillation Index. By receiving more accurate predictions, graziers in northern Queensland are able to avoid overstocking in years when rainfall will be poor. Not only does this limit their losses but it prevents serious pasture degradation that may take decades to repair. CSIRO is developing this as a prototype forecasting system, but we can confidently predict that as we know more about the Antarctic and Southern Ocean we will be able to enhance and extend our predictive ability.
E. The ocean’s surface temperature results from the interplay between deep-water temperature, air temperature and ice. Each winter between 4 and 19 million square km of sea ice form, locking up huge quantities of heat close to the continent. Only now can we start to unravel the influence of sea ice on the weather that is experienced in southern Australia. But in another way the extent of sea ice extends its influence far beyond Antarctica. Antarctic krill—the small shrimp-like crustaceans that are the staple diet for baleen whales, penguins, some seals, flighted sea birds and many fish—breed well in years when sea ice is extensive and poorly when it is not. Many species of baleen whales and flighted sea birds migrate between the hemispheres and when the krill are less abundant they do not thrive.
F. The circulatory system of the world’s oceans is like a huge conveyor belt, moving water and dissolved minerals and nutrients from one hemisphere to the other, and from the ocean's abyssal depths to the surface. The ACC is the longest current in the world, and has the largest flow. Through it, the deep flows of the Atlantic, Indian and Pacific Oceans are joined to form part of a single global thermohaline circulation, During winter, the howling katabatics sometimes scour the ice off patches of the sea's surface leaving large ice-locked lagoons, or ’polynyas'. Recent research has shown that as fresh sea ice forms, it is continuously stripped away by the wind and may be blown up to 90km in a single day. Since only fresh water freezes into ice, the water that remains becomes increasingly salty and dense, sinking until it spills over the continental shelf. Cold water carries more oxygen than warm water, so when it rises, well into the northern hemisphere, it reoxygenates and revitalises the ocean. The state of the northern oceans, and their biological productivity, owe much to what happens in the Antarctic.
graziers
are able to avoid overstocking
Not only
does this limit their losses
but
it prevents serious pasture degradation
CSIRO
is developing this
as a prototype forecasting system
C. Think about this example. You feel unwell. You have a bad cough and always seem to be tired. Perhaps it could be stress at work, or maybe you should give up smoking. You feel worse. You visit the doctor who listens to your chest and heart, takes your temperature and blood pressure, and then finally prescribes antibiotics for your cough.
D. Things do not improve but you struggle on thinking you should pull yourself together, perhaps things will ease off at work soon. A return visit to your doctor shocks you. This time the doctor, drawing on yours of training and experience, diagnoses pneumonia. This means that you will need bed rest and a consider able time off work. The scenario is transformed. Although you still have the same symptoms, you no longer think that these are caused by pressure at work. You now have proof that you are ill. This is the result of the combination of your own subjective experience and the diagnosis of someone who has the stains of a medical expert. You have a medically authenticated diagnosis and it appears that you are seriously ill; you know you are ill and have evidence upon which to base this knowledge.
E. This scenario shows many different sources of knowledge. For example, you decide to consult the doctor in the first place because you feel unwell - this is personal knowledge about your own body. However, the doctor's expert diagnosis is based on experience and training, with sources of knowledge as diverse as other experts, laboratory reports, medical textbooks and yours of experience.
F. One source of knowledge is the experience of our own bodies; the personal knowledge we have of changes that might be significant, as well as the subjective experience of pain and physical distress. These experiences are mediated by other forms of knowledge such as the words we have available to describe our experience and the common sense of our families and friends as well as that drown from popular culture. Over the past decade, for example, Western culture has seen a significant emphasis on stress-related illness in the media. Reference to being ‘stressed out' has become a common response in daily exchanges in the workplace and has become part of popular common-sense knowledge. It is thus not surprising that we might seek such an explanation of physical symptoms of discomfort.
G. We might also rely on the observations of others who know us. Comments from friends and family such as ‘you do look ill' or 'that's a bad cough' might be another source of knowledge. Complementary health practices, such as holistic medicine, produce their own sets of knowledge upon which we might also draw in deciding the nature and degree of our ill health and about possible treatments.
H. Perhaps the most influential and authoritative source of knowledge is the medical knowledge provided by the general practitioner. We expect the doctor to have access to expert knowledge. This is socially sanctioned. It would not be acceptable to notify our employer Unit we simply felt too unwell to turn up for work or that our faith healer, astrologer, therapist or even our priest thought it was not a good idea. We need an expert medical diagnosis in order to obtain the necessary certificate we need to be off work for more than the statutory self-certification period. The knowledge of the medical sciences is privileged in this respect in contemporary Western culture. Medical practitioners are also seen as having the required expert knowledge that permits then legally to pre-scribe drugs and treatment to which patients would not. otherwise have access. However there is a range of different knowledge upon which we draw when making decisions about our own state of health.
I. However, there is more than existing knowledge in this little story; new knowledge is constructed within it. Given the doctor's medical training and background, she may hypothesise 'is this now pneumonia?' and then proceed to look for evidence about it. She will use observations and instruments to assess the evidence and-critically-interpret it in the light of her training and new experience both for you and for the doctor. This will then be added to the doctor's medical knowledge and may help in future diagnosis of pneumonia.
