Reading: Matching Headings: IELTS Academic 9990 (IELTS Academic)

A When lightning strikes ordinary sand, it can leave behind a strange souvenir: a hollow, glassy tube called a fulgurite. The name comes from the Latin word fulgur, meaning "lightning," and the object is sometimes nicknamed "petrified lightning" because its branching, root-like shape traces the exact path the electrical discharge took as it burrowed into the ground.

B A fulgurite forms almost instantly. A lightning bolt can heat the sand it touches to more than 1,800 degrees Celsius for a fraction of a second, hot enough to melt silica grains into liquid glass. As the current forces its way downward through the loose sand, it fuses a narrow channel of glass around itself; within moments the surrounding sand cools the melted material again, leaving a rigid, usually hollow tube where the bolt once passed.

C Fulgurites have been recovered from sandy environments on every continent except Antarctica, including desert dune fields in North Africa, beaches along the Atlantic coast of the United States, and even high, exposed mountain summits where storms are frequent. The largest specimens, found largely intact in loose desert sand, can extend more than two metres beneath the surface, branching downward in a shape that mirrors the lightning's search for the easiest route to the water table.

D Because a fulgurite forms in the exact spot and instant a lightning strike occurred, geologists treat well-preserved specimens as a kind of frozen record. By studying where fulgurites cluster and how deep they reach, researchers can estimate how often a region has been struck by lightning over long periods, and the fused sand itself can reveal what minerals were present in the ground at the moment of formation, sometimes centuries or millennia ago.

E Turning this record into usable data is not straightforward. Fulgurites are extremely brittle and often shatter the moment a shovel disturbs the surrounding sand, so researchers usually reinforce a specimen with plaster or resin before attempting to lift it. Collecting fulgurites is also banned within many national parks and protected reserves, meaning scientists frequently must negotiate special permits, further slowing the pace at which new specimens can be studied.

The passage has five paragraphs, A–E.

List of Headings i. What a fulgurite is and how it got its name ii. The chemistry of glass-making in modern industry iii. The instant physical process that turns sand into glass iv. A growing market for lightning-glass jewellery v. Where fulgurites have been discovered around the world vi. A frozen record of ancient storms and soil minerals vii. Using satellite data to predict future lightning strikes viii. The practical difficulties of excavating a fragile specimen

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E

A It is a common assumption that the world's internet traffic (video calls, financial transfers, emails, streamed films) travels mainly through satellites orbiting overhead. In reality, more than ninety-five percent of all data moving between continents passes instead through a global network of cables laid along the ocean floor, an infrastructure most users never see and rarely think about.

B A modern submarine cable is deceptively slender, often no thicker than a garden hose, yet it houses a bundle of optical fibres each about the width of a human hair. Data travels along these fibres as pulses of light rather than electrical signals, allowing enormous volumes of information to move at close to the speed of light. Layers of steel wire, copper and waterproof polyethylene are wound around the fibres to protect them from water pressure, abrasion and corrosion during decades on the seabed.

C Laying a cable begins with months of route surveying: engineers map the seafloor to avoid volcanic fault lines, existing pipelines and busy fishing grounds before a specialised cable ship spools thousands of kilometres of cable out behind it. Near the coast, where the risk of damage is highest, the cable is buried beneath the seabed using an underwater plough; in the deep ocean, far from ships and anchors, it is usually left to rest directly on the seafloor.

D Despite careful planning, cables break with some regularity. The great majority of faults are caused not by dramatic events but by fishing trawlers dragging nets across the seabed or ships' anchors snagging a cable in shallow coastal waters. Less frequently, undersea landslides or earthquakes can sever several cables at once, occasionally cutting off a whole region's international internet connection for days.

E Repairing a break requires a purpose-built cable ship to sail to the fault's location, identify the exact point of damage by sending test signals along the line, and then use a grappling hook to haul the cable up from the seabed. Technicians splice in a new section of fibre inside an onboard workshop kept as clean as an operating theatre, since even a speck of dust can degrade the signal, before lowering the repaired cable back to the ocean floor.

F Because such an enormous share of global communication depends on a relatively small number of these cables, governments and telecommunications companies increasingly treat them as critical national infrastructure. Investment in additional, redundant routes has grown in recent years, alongside rising concern that a deliberate, coordinated attack on a handful of key cables could disrupt the internet access of entire nations.

The passage has six paragraphs, A–F.

List of Headings i. Layers of protection inside a slender cable ii. The hidden scale of data crossing the ocean floor iii. Why satellites carry the bulk of global data traffic iv. Careful planning before a cable is laid v. The everyday causes of accidental cable damage vi. The rising cost of laying a transatlantic cable vii. Restoring a connection after a break viii. Cables as a matter of national security

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E Paragraph F

A It is widely assumed that offering people more options makes them better off: a shop with fifty types of coffee, the thinking goes, must serve customers better than one with five. Yet a substantial body of research in behavioural psychology suggests that beyond a certain point, additional choice does not simply fail to help. It can actively make people less satisfied and less likely to choose anything at all, a pattern researchers call choice overload.

B In one online-retail trial, a specialist tea company tested two versions of the same product page over several months: one version listed six blends, the other thirty. The longer list attracted more page visits, yet customers who viewed the shorter list were nearly five times more likely to complete a purchase, and a follow-up email survey found they also reported greater confidence that they had chosen well.

C Psychologists attribute this effect to the mental effort involved in comparing many alternatives at once. Weighing the relative merits of thirty similar products demands far more cognitive work than weighing six, and as the number of comparisons grows, so does the fear that an overlooked option might have been better. A nagging possibility that can leave a chooser anxious and prone to delaying or abandoning the decision entirely.

D This pattern is not confined to online shopping. Employees offered a longer list of retirement-savings funds have been found to be less likely to enrol in any plan at all, and subscribers presented with hundreds of thousands of catalogue titles on a streaming platform often report spending more time scrolling than actually watching, suggesting that extensive choice can quietly reduce both action and enjoyment across very different areas of life.

E The effect, however, is not universal. Several follow-up studies indicate that expertise changes the picture considerably: a novice wine drinker confronted with a long list may feel overwhelmed, whereas an enthusiast with well-formed preferences can navigate the same list quickly and often reports enjoying the wider range, suggesting that choice overload strikes hardest when a chooser lacks a clear basis for comparison.

The passage has five paragraphs, A–E.

List of Headings i. Training shop staff to guide indecisive customers ii. The common assumption that more choice is always better iii. An online trial linking fewer options to more purchases iv. The rising cost of stocking a wide product range v. Why comparing many alternatives is mentally demanding vi. Choice overload beyond the shopping aisle vii. How prior expertise can offset the effect

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E

A For most of the twentieth century, a shopper could expect the price on a supermarket shelf or a train ticket to stay fixed for weeks or months at a time, changing only for occasional seasonal sales. That expectation has been quietly overturned by dynamic pricing: software that recalculates a price continuously, sometimes minute by minute, most visibly on ride-hailing apps and airline booking sites where the fare shown can differ from one refresh of the screen to the next.

B Behind the scenes, a pricing algorithm draws on a stream of live data (how many drivers or seats are currently available, how many customers are searching at that moment, competitors' prices, even local weather or a nearby event that might spike demand) and recalculates a price intended to balance supply against demand in something close to real time, rather than the days or weeks a human pricing team would need to respond to the same shift.

C Economists broadly supportive of the practice argue that letting prices rise when demand is high performs a genuinely useful function: a higher fare during a sudden downpour, for instance, is thought to draw more drivers onto the road, while the alternative, a fixed price that cannot rise, would simply leave many would-be passengers unable to find a ride at all, so the resource goes to whoever is both available and willing to pay.

D That argument carries little weight with a customer who finds a fare has multiplied several times over during a transit strike or a severe storm, precisely the moments when travel feels least optional. Consumer groups argue that steep surge multipliers at such times amount to taking advantage of people with no real alternative, and that a price which changes without an obvious explanation feels arbitrary even when a company insists it reflects real supply constraints.

E Facing sustained criticism, several major platforms have introduced caps limiting how many times a base fare can multiply during a declared local emergency, along with clearer on-screen explanations of why a price has risen, and options to be notified once a lower fare becomes available rather than being forced to accept or reject the current one immediately.

F The technique is no longer confined to travel booking. Electricity providers in a growing number of countries now offer tariffs that vary by the hour depending on grid demand, ticket sellers apply similar logic to concerts and sports fixtures as an event date approaches, and some grocery retailers adjust discounts on fresh produce automatically as a use-by date nears, extending a model first associated with ride-hailing into everyday household spending.

The passage has six paragraphs, A–F.

List of Headings i. The data driving a price calculated in real time ii. Comparing dynamic pricing across the airline and hotel industries iii. From fixed prices to prices that update continuously iv. Governments moving to outlaw dynamic pricing altogether v. The efficiency argument in favour of letting prices rise vi. Anger at price rises during moments of crisis vii. How competing firms share pricing data with each other viii. Measures introduced to soften the impact on customers ix. Extending real-time pricing from travel into everyday purchases

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E Paragraph F

A Beavers were once found across nearly the whole of Europe and North America, but relentless trapping for their fur and scent glands left them extinct across most of their historical range by the early twentieth century. In recent decades, however, conservation programmes in several countries have deliberately reintroduced beavers to rivers where they had been absent for generations, driven by a growing recognition that the species does far more for its surroundings than its modest size would suggest.

B Where other animals adapt to an existing landscape, beavers reshape it. Felling trees and packing branches and mud across a stream, a beaver family can build a dam that floods what was previously dry or fast-flowing land, converting it within a single season into a still, shallow pond. Few other non-human species alter the physical structure of their environment so dramatically, a trait that has earned beavers the label "ecosystem engineers."

C The wetlands created behind a beaver dam rarely stay empty for long. Slow-moving, sunlit water encourages aquatic plants to establish, which in turn attract insects, amphibians and waterfowl; young fish often find the calm water behind a dam a safer nursery than the open river beyond it. Researchers comparing dammed and undammed stretches of the same river have repeatedly recorded substantially higher numbers of species in the beaver-modified sections.

D These ponds also perform a quieter service for nearby human communities. By slowing the rate at which rainwater moves downstream, a series of beaver dams can measurably reduce the peak height of a flood after heavy rain, while the water retained in the ponds during drier months keeps the surrounding water table higher for longer. Several water authorities now factor beaver activity into flood- and drought-management plans rather than treating it as an incidental side effect.

E Not every landowner welcomes their return. A dam that floods a field, a forestry track, or the base of a bridge can cause real financial loss, and felled trees occasionally damage fences or outbuildings, so reintroduction schemes increasingly pair the animals with practical mitigation: devices that pierce a dam to keep water below a set level without removing it altogether, allowing the pond's ecological benefits to continue alongside the land's other uses.

The passage has five paragraphs, A–E.

List of Headings i. The waterproof fur and specialised teeth of the beaver ii. Hunted to local extinction, now cautiously returning iii. Captive-breeding programmes in modern zoos iv. Turning a stream into a pond: an animal that reshapes land v. More species sharing the habitat a beaver dam creates vi. Comparing beaver dams with concrete flood barriers vii. An unplanned defence against flood and drought viii. Finding a compromise between dams and land use

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E

A Before 1840, sending a letter in Britain was neither simple nor cheap. Postage was calculated according to the distance a letter travelled and the number of sheets of paper it contained, and it was usually paid not by the sender but by the person receiving it. This arrangement meant that a letter could arrive at its destination only for the recipient to refuse it, leaving the postal service to absorb the cost of carrying it with no payment collected at all.

B In 1837, the reformer Rowland Hill published a pamphlet arguing that this complicated system should be replaced with a single low charge, to be paid by the sender in advance, regardless of how far the letter had to travel. Hill's central claim was that a uniform, low, prepaid rate would encourage far more people to write, more than making up for the lower price per item through a much greater overall volume of mail.

C Parliament accepted Hill's proposal, and in May 1840 the Post Office issued the Penny Black, a small adhesive label bearing a profile portrait of Queen Victoria, which could be bought in advance and stuck onto an envelope as proof that postage had already been paid. It was the first adhesive postage stamp produced anywhere in the world, and its black ink and low denomination gave it its now-famous name.

D The effect on ordinary correspondence was immediate and dramatic. In the year following the introduction of the new penny post, the number of letters carried by the Post Office rose sharply, as people who had previously written only rarely, discouraged by cost and uncertainty, began sending letters to distant relatives, friends and business contacts on a regular basis.

E Other countries soon took note of Britain's success and began issuing their own prepaid adhesive stamps, adapting Hill's model to their own postal systems over the following decades. As more nations adopted broadly similar prepaid schemes, postal administrations began cooperating on shared rules for handling mail that crossed national borders, laying groundwork that would eventually develop into formal international postal agreements.

The passage has five paragraphs, A–E.

List of Headings i. The public's initial resistance to prepaid postage ii. A dramatic rise in the volume of letters sent iii. The confusing and unreliable system that existed before reform iv. A single low fee paid in advance of delivery v. Stamp designs used mainly for advertising purposes vi. The introduction of the world's first adhesive stamp vii. The extension of prepaid postage to other countries viii. The decline of letter-writing in the twentieth century

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E

A Long before modern medicine understood why, military surgeons occasionally noticed something strange on the battlefield: wounds that had been colonised by fly larvae sometimes healed more cleanly, and with less infection, than wounds kept meticulously free of insects. Physicians serving with Napoleon's army and, later, doctors treating casualties of the First World War recorded similar observations among soldiers whose injuries had been left unattended in the field for several days.

B It was the American orthopaedic surgeon William Baer who, having witnessed this pattern among wounded soldiers during the First World War, deliberately introduced sterilised fly larvae into the wounds of patients under his care during the 1920s. Baer's early results were striking enough that maggot therapy, as it became known, was soon adopted by a number of hospitals across the United States as a recognised treatment for wounds that would not otherwise heal.

C The therapy's rise was, however, short-lived. Following the discovery of penicillin and the subsequent development of other antibiotics from the 1940s onward, physicians increasingly turned to pharmaceutical drugs that could be administered as an injection or a tablet, rather than a treatment that required live insects to be placed directly onto a patient's skin. Within a few decades, maggot therapy had all but disappeared from mainstream medical practice.

D Interest in the treatment has revived considerably since the 1990s, largely because of two related problems: a growing number of bacterial strains that no longer respond to standard antibiotics, and a rising incidence of chronic wounds, particularly diabetic foot ulcers, that resist conventional treatment for months or even years. For patients facing these conditions, maggot therapy has re-emerged as a viable option where other treatments have failed.

E In current clinical use, the larvae of a specific species, the green bottle fly, are bred and sterilised under laboratory conditions before being placed inside a fine mesh dressing over the wound. As they feed, the larvae consume only dead and infected tissue, leaving healthy tissue largely undisturbed, while also secreting substances that appear to have an antimicrobial effect on the surrounding area.

F Despite this clinical effectiveness, uptake of the therapy remains limited by a factor with nothing to do with its medical merit: many patients report finding the idea of live larvae on their skin distressing, and some hospital staff share this reaction. Overcoming this discomfort, clinicians note, is often a greater obstacle to wider adoption than any remaining question about the treatment's efficacy.

The passage has six paragraphs, A–F.

List of Headings i. Early observations that wounds containing insect larvae healed unusually well ii. The mechanism by which larvae clean a wound iii. A treatment introduced into formal medical practice after wartime observation iv. Two modern medical problems have revived interest in an old treatment v. Patient discomfort remains an obstacle to wider use vi. Legal restrictions on breeding insects for medical use vii. A treatment abandoned once a faster alternative became available viii. International regulation of larval therapy products

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E Paragraph F

A Ask a group of students how they prepare for an exam, and the overwhelming majority will describe some version of the same routine: rereading a textbook chapter, copying out notes, or highlighting key passages in a different colour each time they review the material. These strategies share a common appeal (they feel productive, and the material grows steadily more familiar with each pass) yet decades of research in cognitive psychology suggest that this growing sense of familiarity is a poor predictor of how well the information will be remembered weeks later.

B A far more effective strategy, according to that same body of research, is what psychologists term the testing effect: the finding that the act of retrieving information from memory, such as answering a practice question without looking at one's notes, produces stronger and more durable learning than an equivalent amount of time spent simply rereading the same material. Crucially, the benefit appears even when no feedback is given after the retrieval attempt, and even when the attempt is unsuccessful.

C The effect has been demonstrated repeatedly under controlled conditions. In one influential design, researchers divided students into two groups after they had studied a passage: one group restudied the same passage a second time, while the other group instead took a short recall test on it without seeing the passage again. When both groups were tested on the material a week later, the group that had originally taken the practice test substantially outperformed the group that had simply reread the passage, despite having spent no additional time with the original text.

D One explanation offered for this pattern is that retrieval is a "desirable difficulty": because reconstructing a memory from cues is more mentally effortful than recognising familiar words on a page, it forces the brain to rebuild and reinforce the pathways associated with that memory, in a way that passive rereading, which requires comparatively little effort, does not.

E Increasingly, teachers are being encouraged to build brief, low-stakes retrieval opportunities directly into lessons (a short quiz at the start of class on the previous week's material, for instance, or flashcards revisited at increasing intervals) rather than reserving testing for graded assessments alone. Interestingly, students asked to rate which method helped them learn best often rank rereading above self-testing, apparently because the fluency of recognising familiar text is mistaken for genuine mastery of it.

The passage has five paragraphs, A–E.

List of Headings i. Study methods that feel effective but often are not ii. Actively recalling information strengthens memory more than reviewing it again iii. Experimental evidence comparing two revision strategies over time iv. A possible explanation for why effortful recall strengthens memory v. Bringing self-testing into everyday classroom teaching vi. The role of sleep in consolidating new information vii. Why learners often misjudge which methods are helping them viii. The financial cost of standardised testing in schools

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E

A According to a well-known story, the practice of kintsugi began in the late fifteenth century, when a Japanese military ruler sent a favourite tea bowl that had cracked to China to be repaired. The bowl came back mended with ugly metal staples, and the ruler, dissatisfied, is said to have asked Japanese craftsmen to find a more elegant solution. One that gave rise to the technique now known as kintsugi, or "golden joinery."

B The process itself is painstaking and slow. Broken fragments of a ceramic piece are rejoined using urushi, a natural lacquer derived from tree sap, which is applied along each crack and left to cure for days at a time before the next layer can be added. Once reassembled, the visible seams are dusted with a fine powder of gold, silver or, occasionally, platinum, so that the repair itself becomes a deliberate part of the object's finished appearance.

C This deliberate visibility reflects a broader current in Japanese aesthetics known as wabi-sabi, a worldview that finds beauty in imperfection, age and transience rather than in flawless symmetry. Where many traditions treat a crack as a defect to be disguised, the philosophy behind kintsugi holds that an object's history of breakage and repair is worth displaying, since the marks left by damage are, in this view, part of its story rather than a diminishment of its worth.

D Producing an authentic kintsugi repair, however, requires years of training under an experienced craftsperson, since working with natural lacquer demands considerable skill; a poorly controlled curing process can ruin a piece entirely. This stands in sharp contrast to the inexpensive "kintsugi kits" now sold to hobbyists, which substitute synthetic epoxy resin and glue-on gold powder for real lacquer, producing a similar look far more quickly but without the durability, or arguably the authenticity, of the traditional method.

E Outside Japan, interest in kintsugi has grown substantially over the past two decades, with museums mounting exhibitions of repaired ceramics, craft schools in Europe and North America offering introductory workshops, and the technique regularly featured in design and lifestyle publications aimed at an international audience.

F Beyond ceramics, the idea behind kintsugi has increasingly been borrowed as a metaphor in psychology and self-help writing, where the repaired bowl is presented as a symbol of resilience: a person who has recovered from hardship may emerge not merely intact but more valuable, their history of struggle made visible rather than hidden, much as gold highlights rather than disguises a bowl's former cracks.

The passage has six paragraphs, A–F.

List of Headings i. A legend explaining how the technique first came about ii. A meticulous, time-consuming process of rejoining and finishing broken pieces iii. An aesthetic outlook that treats a repaired imperfection as beauty rather than as a flaw to hide iv. The gap between traditionally trained artisans and mass-produced imitation kits v. The technique's growing fame outside its country of origin vi. Its adoption as a metaphor for resilience and personal growth vii. Government funding for the preservation of traditional crafts viii. The chemical composition of the lacquer used ix. International trade regulations affecting antique ceramics

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E Paragraph F

A Across a growing number of high-income countries, the single most common type of household is no longer a couple with children, or even a couple without children, but a single adult living entirely alone. In several European nations, the proportion of one-person households has more than doubled since the 1960s, and demographers now estimate that roughly a third of all households in some major cities consist of someone living by themselves.

B Part of this shift can be traced to changes in how and when people form partnerships. Across much of the developed world, the average age at first marriage has risen by several years since the mid-twentieth century, while rates of separation and divorce have climbed steadily, leaving a larger share of working-age adults living alone at some point between relationships, whether by circumstance or as an interim arrangement.

C A separate and demographically distinct driver operates at the other end of the age range: as life expectancy has increased, a growing number of older adults, particularly women, outlive their spouses by a decade or more, and increasingly choose or are obliged to remain in their own homes alone rather than move in with adult children, as was more common in earlier generations.

D None of this would be possible on the same scale without a further, largely economic, precondition: rising average incomes in many cities have made a single wage sufficient to cover an entire household, while the growth of compact urban housing stock, including studio apartments built for one occupant, has made solo living a realistic option in a way it rarely was a century ago.

E Distinct from either the relationship-driven or the economic explanation is a more recent cultural change, most pronounced among adults in their twenties and thirties: for a growing number of these individuals, living alone is not a temporary state between relationships or a response to bereavement, but an actively chosen arrangement, valued for the independence it offers, even among those who could readily afford to share accommodation with a partner or housemates.

F Whatever combination of causes lies behind it in a given country, the trend carries practical consequences that planners are only beginning to address: housing markets built around family-sized units must adapt to demand for smaller dwellings, while public health researchers warn that older people living alone face a heightened risk of social isolation that community services are not yet fully equipped to address.

The passage has six paragraphs, A–F.

List of Headings i. The scale of a trend now visible across many high-income countries ii. Later marriage and higher rates of separation among working-age adults iii. Longer lifespans and the loss of a partner in later life iv. Rising affluence and city living making solo households more affordable v. A cultural shift toward valuing independence over shared living vi. New challenges this trend poses for housing and social policy vii. Government incentives designed to encourage larger families viii. A return to multigenerational households in some regions ix. International comparisons of household income levels

Choose the correct heading for each paragraph from the list of headings below.

Paragraph A Paragraph B Paragraph C Paragraph D Paragraph E Paragraph F