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

Tardigrades, microscopic eight-legged animals known as water bears, can survive complete drying out by entering a motionless state called cryptobiosis, sometimes for years, before resuming normal activity within hours of rehydration. For most of the twentieth century the mechanism behind this was little more than speculation. Only in the last two decades have several independent research groups begun to explain how the animals actually achieve it.

Dr. Petra Lindqvist, of the Cryobiology Unit at the Tromsø Polar Institute, isolated a class of proteins, which she named vitrin proteins, that appear inside tardigrade cells only during drying and reorganise the cell's remaining water into a rigid, glass-like state that halts damaging chemical reactions. Using gene-silencing techniques, Lindqvist's team then blocked production of vitrin proteins in a laboratory population; when dried out, none of these modified specimens survived, compared with over 80 percent of an unmodified control group.

Professor Adebayo Okonjo, at the Kestrel Marine Station, compared how the speed of drying affects survival. His team dried genetically similar tardigrade populations either slowly, over 48 hours in a humidity-controlled chamber, or rapidly, within 90 minutes under a dry air stream. Specimens dried slowly survived at a rate of 91 percent, compared with just 28 percent among those dried rapidly, showing that the pace of water loss strongly influences an individual's chances of entering dormancy successfully.

Dr. Miriam Castellanos, of the Sierra Altiplano Research Station, used high-speed video microscopy to document the physical transformation the animals undergo before dormancy: as water is lost, the animals retract their legs and contract into a compact, barrel-like shape called a "tun", a process her footage showed unfolds gradually over several hours.

Dr. Henrik Sallman, of the Baltic Coastal Research Unit, tracked oxygen consumption after rehydration as a measure of metabolic activity. He found that specimens dormant for only a few days resumed measurable activity within about 30 minutes of rehydration, whereas specimens that had remained dried for over a year took closer to two hours, suggesting the length of dormancy affects how quickly normal function can restart.

The phenomenon itself was recorded long before any of this mechanistic work began: the Victorian naturalist Dr. Eleanor Fitzwilliam noted, in an 1878 paper on moss-dwelling invertebrates, that dried "water bears" could be revived simply by adding a drop of water, though without explaining the underlying mechanism. Her account is remembered today as the first written record of the effect, not as an analysis of its cause.

List of Researchers A. Dr. Petra Lindqvist B. Professor Adebayo Okonjo C. Dr. Miriam Castellanos D. Dr. Henrik Sallman E. Dr. Eleanor Fitzwilliam

The following statements describe findings about tardigrade cryptobiosis. Match each statement with the correct option, A–E. NB You may use any option more than once.

1. Identified a specific class of protective molecules that helps form a rigid, glass-like state inside cells during dehydration.
2. Found that experimentally blocking production of a particular protective molecule caused nearly all treated specimens to die when dried out.
3. Showed that the speed at which drying occurs significantly affects an individual's chances of survival.
4. Provided a specific numerical comparison between survival rates under a slow-drying and a rapid-drying regime.
5. Documented the gradual physical process by which the body contracts into a compact shape before full dormancy begins.
6. Established roughly how quickly metabolic activity resumes once a dormant specimen is rehydrated.
7. Found that the length of time a specimen had spent in dormancy affected how quickly it resumed normal activity after rehydration.

Organised firefighting has taken strikingly different institutional forms across history, shaped as much by politics and building materials as by the danger of fire itself.

In Rome, repeated fires devastated crowded, wood-framed apartment blocks until the emperor Augustus, early in the first century, established the Vigiles, a corps of several thousand men recruited mainly from the freed-slave population. Organised into cohorts stationed around the city, the Vigiles patrolled at night carrying buckets, hooks and axes, and were empowered to fine property owners who kept flammable materials in violation of building rules, making Rome's brigade as much a fire-prevention police force as an emergency response unit.

A different model emerged centuries later in Song-dynasty China, where the crowded wooden cities of Kaifeng and later Hangzhou built networks of tall watchtowers, staffed around the clock so that a fire could be spotted and its location signalled to the nearest brigade within minutes. Unlike Rome's centrally organised corps, these Song brigades were funded and staffed at the neighbourhood level, with each watchtower's crew responsible only for extinguishing fires within its own assigned district, using bucket relays drawn from wells and canals.

London took a further step after the Great Fire of 1666 destroyed much of the old city: insurance companies, newly aware of the cost of unchecked fires, began forming their own private brigades and issued customers metal "fire marks" to fix to their walls, so that a company's crew would know, on arriving, whether a burning building was actually insured with them before committing their equipment.

In the nineteenth-century United States, brigades made up of unpaid local volunteers gradually gave way to salaried municipal departments once steam-powered pumping engines, too heavy and technical for casual volunteer crews, became the standard firefighting equipment in growing cities; the shift to professional, publicly funded departments was largely complete by the century's end.

Similar neighbourhood-based fire-watch systems also existed earlier still in the Byzantine Empire, though far less is recorded about how they were funded or organised than about their later counterparts elsewhere.

List of Time Periods and Places A. Ancient Rome B. Song-dynasty China C. 17th-century London D. 19th-century United States E. the Byzantine Empire

The following statements describe developments in the history of firefighting. Match each statement with the correct option, A–E. NB You may use any option more than once.

1. Fire brigade crews were organised and funded at the neighbourhood level, with each watchtower's team responsible only for fires within its own district.
2. A fire brigade fined property owners for storing flammable materials in breach of building regulations.
3. Companies operating fire brigades issued customers a mark to display on their walls to show they were insured.
4. Volunteer fire crews were replaced by salaried municipal departments once steam-powered pumping engines became standard.
5. Firefighters were recruited mainly from among freed slaves and organised into cohorts stationed around the city.
6. A network of continuously staffed watchtowers allowed a fire's location to be signalled to the nearest brigade within minutes.
7. New heavy, technical equipment made it impractical for casual, unpaid crews to continue operating effectively.

Retail businesses seeking rapid growth today typically choose among several distinct organisational models, each carrying a different balance of control, risk and capital requirement.

Under the direct-to-consumer model, a company manufactures or sources its own products and sells them exclusively through its own website and, increasingly, a small number of company-owned stores, bypassing traditional retailers and wholesalers entirely. Because every sale flows through channels the company itself owns, it retains complete access to customer purchase data and can adjust pricing or marketing instantly, but the company also carries the full cost of holding inventory and absorbs the entire loss if a product line fails to sell.

The franchise model spreads that financial risk across many independent operators: a franchisor licenses its brand name, store design and operating procedures to individual franchisees, who each invest their own capital to open and run a location in exchange for a share of revenue paid back to the franchisor. This structure allows a brand to expand into many locations far faster than it could by opening company-owned stores itself, since each new outlet is funded by someone other than the franchisor, though the franchisor sacrifices a degree of day-to-day control over how each outlet is actually run and rarely gains direct access to that outlet's own customer data.

A marketplace or platform aggregator, by contrast, never takes ownership of the goods sold through it at all; it simply provides the technology that connects independent third-party sellers with buyers, taking a commission on each transaction. This model can scale to an enormous number of product categories with very little inventory risk of its own, since unsold stock is always someone else's problem, but it depends entirely on attracting and retaining enough independent sellers to keep its catalogue competitive.

The subscription-box model instead sells access to a recurring, curated selection of products delivered on a fixed schedule, most commonly monthly. Because customers commit to an ongoing payment rather than a single purchase, this model produces unusually predictable, forecastable revenue compared with one-off retail sales, which in turn makes it easier to plan inventory purchasing in advance, though it also means the company must continually source fresh products to keep long-term subscribers from cancelling out of boredom.

Some long-established manufacturers instead pursue vertical integration, owning every stage from raw materials to retail, but this approach is now less common among newer retail entrants than the four models above.

List of Business Models A. Direct-to-consumer model B. Franchise model C. Marketplace/platform aggregator model D. Subscription-box model E. Vertical integration

The following statements describe characteristics of retail business models. Match each statement with the correct option, A–E. NB You may use any option more than once.

1. The company retains full access to customer purchase data because every sale goes through channels it controls itself.
2. Financial risk is spread across many independent operators who each invest their own capital to open a location.
3. The business takes a commission on transactions without ever owning the goods being sold.
4. Revenue tends to be unusually predictable because customers commit to an ongoing recurring payment rather than one-off purchases.
5. Expansion into new locations can happen faster than a company opening its own stores, because new outlets are funded by someone other than the parent brand.
6. Success depends on continually attracting enough independent sellers to keep the catalogue competitive.
7. The company bears the full cost of unsold inventory itself if a product line fails.
8. Ongoing product sourcing is required to prevent long-term customers from cancelling out of boredom.

Mangrove forests growing along tropical coastlines are rarely made up of a single tree species; instead, several distinct species typically grow in bands running from the water's edge inland, each having evolved a different way of coping with salt water that would kill most ordinary trees.

Closest to open water, standing directly in the tidal zone, is usually the red mangrove. Its roots contain a specialised membrane that filters out roughly ninety per cent of the salt in seawater before it ever enters the plant's tissue, a process known as ultra-filtration. Because the surrounding mud is almost permanently waterlogged and low in oxygen, red mangrove also grows arching, above-ground "prop roots" that lift much of the root system clear of the anaerobic mud and allow it to take in air directly.

Slightly further inland, in a zone still flooded by most high tides but for shorter periods, black mangrove dominates. Rather than filtering salt out at the root, it allows salt to enter and then actively pumps the excess back out through glands on the surface of its leaves; on a hot day, the excreted salt often dries into visible white crystals that can be brushed off the leaf. Black mangrove also sends up thousands of narrow, pencil-like roots called pneumatophores that poke directly out of the mud to draw in oxygen.

Further inland still, in ground that floods only during unusually high spring tides, grows white mangrove. Like black mangrove, it excretes excess salt through glands, though its glands sit at the base of each leaf stalk rather than across the whole leaf surface, and it tends to accumulate noticeably less salt in its tissues overall than either of the two species growing closer to the water.

At the landward edge of the forest, in ground the tide reaches only during exceptional storms, buttonwood grows. Unlike its three neighbours, buttonwood has no dedicated salt-excreting glands and cannot filter salt at the root; it survives in this outer zone only because rainfall and freshwater runoff there keep the soil's salinity relatively low compared with the tidal mud closer to the water.

Mangrove ferns, an epiphytic species that grows attached to the trunks of several of these trees rather than rooted in the mud itself, are common throughout the forest but were not part of this particular salinity study.

List of Species A. Red mangrove B. Black mangrove C. White mangrove D. Buttonwood E. Mangrove fern

The following statements describe traits found in a mangrove forest. Match each statement with the correct option, A–E. NB You may use any option more than once.

1. Filters out most of the salt in seawater at the root before it enters the plant's tissue.
2. Grows arching roots above the mud surface to obtain oxygen in permanently waterlogged, low-oxygen ground.
3. Excretes excess salt through glands spread across the surface of its leaves, sometimes leaving visible crystals.
4. Sends up narrow, upward-pointing roots that emerge directly from the mud to take in air.
5. Excretes salt through glands located at the base of each leaf stalk rather than across the whole leaf.
6. Accumulates less salt in its tissue than the two species that grow closer to the water.
7. Has no dedicated structure for excreting or filtering out salt, and instead relies on rainfall keeping the local soil less salty.

As electricity grids incorporate growing shares of solar and wind power, engineers have turned to several very different technologies to store surplus electricity for use when the sun is not shining or the wind is not blowing.

The oldest and still the most widely deployed method is pumped-hydro storage, in which surplus electricity is used to pump water uphill from a lower reservoir to a higher one; when electricity is needed, the water is released back downhill through turbines to generate power on demand. Because it requires two large reservoirs connected by a significant change in elevation, pumped-hydro storage is highly site-specific and can rarely be built close to the cities that most need the power, but a single large installation can store enough energy to supply a city for several hours and, once built, can operate for many decades with only modest maintenance.

Lithium-ion battery arrays, by contrast, can be installed almost anywhere, including directly beside the substations they serve, and can begin releasing stored power within milliseconds of being called upon, making them particularly well suited to smoothing sudden, short-lived fluctuations in electricity supply or demand. Their capacity gradually degrades with every charge-and-discharge cycle, however, so utilities typically plan to replace battery arrays after a decade or so of heavy daily use, far sooner than a pumped-hydro plant would need replacing.

Compressed-air energy storage takes a different approach again: surplus electricity drives compressors that force air into large sealed underground caverns, often ones left behind by mining or gas extraction, and the compressed air is later released through a turbine to generate electricity when demand rises. Like pumped-hydro, this method depends on finding a suitable underground cavern in the first place, but it can store energy for considerably longer stretches, sometimes across an entire season, without significant loss.

Flywheel storage instead keeps a heavy rotating disc spinning at very high speed inside a low-friction, near-vacuum housing; surplus electricity accelerates the disc further, and drawing electricity back out simply slows it down. Flywheels release stored energy quickly enough to help stabilise a grid's frequency from moment to moment, but they can typically only hold useful amounts of energy for a matter of minutes rather than hours, which limits their role mainly to short-term frequency regulation rather than storing energy for later use.

Hydrogen-based power-to-gas storage, which converts surplus electricity into hydrogen gas for later reuse, remains a comparatively small part of today's grid-storage mix and was not examined in detail in this comparison.

List of Storage Systems A. Pumped-hydro storage B. Lithium-ion battery arrays C. Compressed-air energy storage D. Flywheel storage E. Hydrogen power-to-gas storage

The following statements describe features of grid-scale energy storage technologies. Match each statement with the correct option, A–E. NB You may use any option more than once.

1. Depends on finding two large reservoirs connected by a substantial change in elevation.
2. Can operate for many decades once built, requiring only modest maintenance.
3. Can begin releasing stored power within milliseconds and is well suited to smoothing short-lived fluctuations in supply or demand.
4. Gradually loses capacity with each charge-and-discharge cycle and is typically replaced after about a decade of heavy use.
5. Uses surplus electricity to force air into sealed underground caverns, often left behind by mining or gas extraction.
6. Can store energy for an entire season with little loss, once a suitable underground site is found.
7. Keeps a heavy disc spinning at high speed inside a low-friction, near-vacuum housing.
8. Can typically hold a useful amount of energy for only a matter of minutes, limiting its role mainly to short-term frequency regulation.

Musical Chills: Four Explanations for a Puzzling Reflex

About half of all listeners occasionally feel a sudden wave of goosebumps or a shiver down the spine while listening to a particular passage of music, a sensation researchers call frisson. The feeling rarely lasts more than a few seconds and cannot reliably be summoned on demand, which has made it a difficult phenomenon to study. Four researchers have proposed strikingly different accounts of why it occurs.

Dr Elena Marsh argues that frisson is triggered when a piece of music builds a strong expectation about how a melody will resolve, then breaks that expectation in a controlled way. Analysing waveforms against the self-reported chill timestamps of 84 volunteers, she found a sudden departure from the expected harmony occurred immediately before roughly seventy percent of reported chills. Her model also predicts repeated listening should gradually blunt the effect, since a surprise heard often enough stops being a surprise.

Professor Tobias Lindqvist instead traces the sensation to an inherited startle reflex. He notes the acoustic features most reliably associated with chills (a sudden swell in volume, or a solo voice breaking into a high register) closely resemble the alarm calls many species use to signal danger. In his view, frisson is a vestigial version of the reflex that once raised an animal's fur to make it appear larger to a threat.

Dr Priya Nandakumar has focused instead on the social context in which music is heard. Measuring oxytocin in saliva samples before and after listening sessions, she found the sharpest increases among audience members attending a live performance together, compared with participants listening alone through headphones. Chills in the group setting were rated as more intense, their strength tracking how connected participants felt to those around them, leading her to propose the sensation rewards behaviour that strengthens group bonds.

Professor Karel Novak surveyed 500 participants using a standard personality questionnaire and found frisson frequency correlates strongly with a single trait: openness to experience. No comparable relationship emerged for extraversion, conscientiousness or any other trait measured. Novak suggests frisson-proneness may simply be a symptom of a broader tendency toward imaginative absorption, not a response to any specific feature of the music.

Not every researcher is convinced a single mechanism can be isolated. Dr Sofia Bergman has publicly questioned all four accounts, pointing out that frisson studies rely almost entirely on self-report, and that a sensation lasting only a few seconds is notoriously hard for a participant to flag accurately in the moment. A gap she believes none of the four explanations has yet resolved.

List of Researchers A Dr Elena Marsh B Professor Tobias Lindqvist C Dr Priya Nandakumar D Professor Karel Novak E Dr Sofia Bergman

Match each statement with the correct option, A–E. NB You may use any option more than once.

1 Found that a chill was usually preceded by an unexpected shift away from the harmony a listener would have predicted. 2 Linked the sensation to a defensive reflex that once made an animal's fur stand up to appear larger. 3 Reported bigger physiological increases among people who experienced the music in the company of others. 4 Suggested that a person's likelihood of feeling frisson is connected to one particular personality trait. 5 Predicted that returning to the same recording many times should gradually weaken the effect. 6 Argued that the sounds most likely to cause the sensation share acoustic qualities with warning signals used by animals. 7 Found no meaningful relationship between the frequency of chills and how outgoing or sociable a person is.

Persistent Hiccups: Four Ways Doctors Try to Stop Them

Most bouts of hiccups end within minutes, but a small number of patients develop an episode lasting more than 48 hours, a condition doctors call persistent hiccups, or one lasting beyond a month, termed intractable hiccups. Left untreated, a prolonged episode can disturb sleep and eating, and in rare cases leave a patient exhausted and underweight. Clinicians have developed several approaches to interrupt the reflex, each suited to a different stage of severity.

The first line of treatment is usually a set of simple vagal manoeuvres (actions such as holding the breath, swallowing a spoonful of dry sugar, or gargling with ice-cold water) that stimulate the vagus nerve and can interrupt the reflex arc responsible for the spasm. These techniques require no prescription and can be attempted by the patient at home; case reviews suggest they resolve roughly one in three episodes that have lasted under a week, with no reported side effects.

When vagal manoeuvres fail, doctors often turn to a muscle-relaxant medication taken by mouth for one to two weeks, most commonly a drug that dampens the nerve signalling responsible for the diaphragm's spasms. It remains the most widely used treatment for hiccups persisting beyond 48 hours, but because it acts on the central nervous system its most common side effect is drowsiness, and patients are advised not to drive during the course.

For cases that do not respond to medication, an anaesthesiologist can perform a phrenic nerve block, injecting a local anaesthetic close to the nerve that controls the diaphragm under ultrasound or X-ray guidance. The hiccups stop only for as long as the injected anaesthetic keeps the nerve numbed, typically one to three weeks, giving the diaphragm an extended rest; the procedure is generally reserved for episodes that have already resisted simpler treatment.

In the rare cases where hiccups continue for months or years despite every other measure, surgeons can implant a diaphragmatic pacing device, a battery-powered unit similar in principle to a cardiac pacemaker, which delivers regular electrical pulses to override the erratic nerve signal. Because it requires surgery and ongoing device maintenance, it is used only once every less invasive option, including a nerve block, has already been tried and failed.

Acupuncture has also been tried for stubborn hiccups, and individual clinicians report occasional success, but the handful of published cases are too small and too inconsistent for researchers to draw any general conclusion about how often it works or for whom, and it does not currently appear in standard treatment guidelines.

List of Treatments A vagal manoeuvres B muscle-relaxant medication C a phrenic nerve block D a diaphragmatic pacing device E acupuncture

Match each statement with the correct option, A–E. NB You may use any option more than once.

1 Can be attempted by a patient at home without a doctor's involvement. 2 Its effect on the hiccups lasts only as long as the anaesthetic keeps the relevant nerve numbed. 3 Is only used once every less invasive treatment, including an injected nerve block, has already failed. 4 Is usually prescribed only after simple physical techniques have not stopped the hiccups. 5 Commonly makes patients feel drowsy, so they are advised not to drive while taking it. 6 Requires a surgically implanted device that functions on a similar principle to a device used for heart problems. 7 Is carried out by a specialist using imaging to guide an injection near a specific nerve. 8 Resolves roughly one in three episodes that have lasted less than a week.

Teaching Every Age at Once: Four Approaches to the Multigrade Classroom

In many sparsely populated regions, a single school building serves an entire community, and one teacher may be responsible for pupils aged five to fourteen within the same room. Rather than treat this as an unavoidable compromise, several educators over the past century have designed deliberate methods for making a mixed-age classroom work, and their approaches differ sharply in how they organise pupils' time and relationships.

The Polish educator Elena Kowalik built her method around structured peer teaching. In her classrooms, pupils in the two oldest age groups spent part of each afternoon formally instructing younger children in reading and arithmetic, following lesson plans Kowalik herself had prepared in advance. She argued the practice benefited older pupils as much as younger ones, since explaining a concept aloud forced them to understand it more securely themselves.

The Birch Hollow School, established in a Vermont farming valley in the 1970s, abandoned age grouping altogether in favour of self-paced subject modules. Every pupil, regardless of age, worked through the same sequence of written modules at an individual pace, moving on only once a short assessment confirmed mastery, while a single teacher circulated offering guidance rather than lecturing the room as a whole. Some pupils therefore completed the primary curriculum a year or more ahead of others their own age.

In his one-room school in rural Nigeria, Thomas Adeyemi divided the classroom into four permanent activity corners, each dedicated to a different subject and stocked with materials suited to a range of ages. Small mixed-age groups rotated between the stations over the course of a day, so a seven-year-old and an eleven-year-old might work side by side at a mathematics station before separating for the reading corner, each following instructions pitched to their own level.

The Prairie Circle Cooperative, a network of small farm-town schools, grouped children into mixed-age "family units" of eight to ten pupils that stayed together, with the same teacher, for several consecutive years rather than being reassigned annually. Cooperative staff reported the arrangement reduced the disruption pupils usually feel when moving to a new teacher and classmates each September, since younger children could rely on familiar older pupils to show them the routines from their first day.

Not every attempt at formalising multigrade teaching has endured. The Halvorsen Rotation, devised by the Norwegian educator Berit Halvorsen in the 1950s, had pupils switch teachers every forty minutes regardless of age; it was abandoned within two years after staff reported pupils spent more time readjusting to new instructions than actually working.

List of Educators and Schools A Elena Kowalik B The Birch Hollow School C Thomas Adeyemi D The Prairie Circle Cooperative E The Halvorsen Rotation

Match each statement with the correct option, A–E. NB You may use any option more than once.

1 Had older pupils follow prepared lesson plans to formally teach younger pupils. 2 Let pupils of any age move through the same set of learning materials at their own individual speed. 3 Organised the classroom into fixed corners, each associated with one subject, that small mixed-age groups rotated between. 4 Kept the same small group of pupils together with one teacher across several years rather than reassigning them annually. 5 Reported that pupils could progress through the curriculum faster or slower than others their own age. 6 Reduced the disruption new pupils usually feel when starting with a new teacher and classmates each year. 7 Believed that instructing a younger child helped the older pupil doing the teaching understand the material better.

Four Shapes the Sea Carves into the Land

Where land meets ocean, the resulting coastline can take strikingly different forms depending on the geological processes that shaped it long before the sea reached its present level. Four coastal landforms in particular are often confused with one another, because each involves water intruding into what was once dry land, even though the processes that created them, and the shapes that result, are quite distinct.

Fjords begin as steep-sided valleys gouged out by glaciers during past ice ages, when moving ice carved a deep, U-shaped trough far below current sea level. When the ice retreated and global sea levels rose, the ocean flooded these troughs, producing long, narrow inlets with near-vertical rock walls and water that can exceed several hundred metres in depth close to shore. A shallow underwater ridge, or sill, often marks the point where the ancient glacier once ended.

Rias form through a different process entirely: rising sea levels drowning the lower reaches of an ordinary river valley that was never touched by glacial ice. Because the valley was originally carved by a river rather than a glacier, a ria has a V-shaped cross-section rather than a fjord's U-shape, its depth decreases gradually toward the river mouth, and it typically lacks the deep underwater sill found at a fjord's entrance.

Barrier islands are elongated ridges of sand built up parallel to the mainland shore by the combined action of waves, tides and longshore currents depositing sediment offshore. A shallow, sheltered lagoon typically separates the island from the mainland, and because the islands are made of loose sand rather than solid rock, storms can shift their shape dramatically within a single season, sometimes opening a new inlet or closing an old one entirely.

Mangrove coasts develop where fine river-borne sediment accumulates along low-energy, sheltered tropical shorelines, creating soft mudflats that salt-tolerant mangrove trees are able to colonise. The dense root systems anchoring these trees trap yet more sediment with each tide, while providing a nursery habitat for young fish and crustaceans that shelter among the submerged roots at high tide.

Sea cliffs, by contrast, form where waves attack an exposed, resistant rockface directly, undercutting its base until the unsupported rock above collapses; the coastline then retreats gradually inland over centuries rather than advancing seaward, and unlike the four landforms above, no flooding or sediment deposition is required for a cliff coastline to form.

List of Landforms A fjords B rias C barrier islands D mangrove coasts E sea cliffs

Match each statement with the correct option, A–E. NB You may use any option more than once.

1 Forms when glacially carved valleys are flooded by rising seas after an ice age. 2 Has a V-shaped cross-section rather than a U-shape, because a river rather than a glacier originally carved it. 3 Is made of loose sand and can change shape noticeably after a single storm. 4 Provides a sheltered nursery habitat for young fish among its submerged roots. 5 Often has a shallow underwater ridge marking where the glacier that formed it once ended. 6 Typically has a shallow lagoon lying between it and the mainland shore.

Four Twentieth-Century Movements That Redefined the Building

The twentieth century produced a series of architectural movements that each reacted, in different ways, to industrial change, the aftermath of war, or the perceived blandness of an increasingly uniform international style. Four such movements, though they overlapped in time, pursued strikingly different visions of what a building, and a city, should look like.

Brutalism, which flourished from the 1950s to the 1970s, took its name not from the word "brutal" but from the French phrase for raw concrete, béton brut, the material its architects left exposed and unfinished rather than concealed behind a decorative facade. Public housing blocks, university campuses and civic buildings built in this style typically favour massive, blocky forms, small irregular window openings, and a visible expression of a building's structural function on its exterior.

Streamline Moderne emerged in the 1930s, drawing its visual vocabulary directly from the aerodynamic curves being developed for aircraft, ocean liners and automobiles of the era. Buildings in this style favour smooth, rounded corners in place of sharp right angles, horizontal bands that wrap continuously around a facade to suggest forward motion, and porthole-shaped windows borrowed from ship design, giving structures as static as a cinema or a diner the visual impression of speed.

Metabolism developed in Japan from 1960 onward, proposing that buildings, and even whole cities, should be designed like living organisms, capable of growth and renewal through the replacement of individual parts rather than the demolition of the whole structure. Its signature projects consist of small, mass-produced capsule units that clip onto a permanent central core, so an individual capsule could, in theory, be unbolted and replaced every few decades without disturbing the surrounding structure.

Critical Regionalism arose in the late 1970s as a deliberate reaction against increasingly identical glass towers appearing in cities worldwide, arguing a building should respond to the specific climate, light and building traditions of its site rather than follow a single placeless formula. Its practitioners favour local materials, natural ventilation suited to the regional climate, and construction details drawn from vernacular building techniques, while still using distinctly modern forms rather than direct historical imitation.

Deconstructivism, which gained prominence in the late 1980s, took a different approach again, deliberately fragmenting a building's form into skewed, seemingly unstable-looking shapes that reject the straight lines and right angles of most preceding movements, though its early buildings were often criticised for prioritising an unconventional silhouette over practical, everyday usability.

List of Movements A Brutalism B Streamline Moderne C Metabolism D Critical Regionalism E Deconstructivism

Match each statement with the correct option, A–E. NB You may use any option more than once.

1 Took its name from a French term for unfinished, exposed concrete. 2 Borrowed curved forms and porthole windows from the design of ships and aircraft. 3 Compared a building to a living organism whose individual parts could be replaced over time. 4 Argued that a building's design should respond to the climate and traditions of its specific location. 5 Left a building's structural function visibly exposed on the outside rather than hidden behind decoration. 6 Used horizontal bands running around a facade to create an impression of forward motion. 7 Favoured local, natural ventilation methods suited to a region's climate over standardised design.