π IELTS β Reading: Matching Headings
Tutorial β’ Passage + Questions β’ Answer Key β’ Vocabulary β’ Phrases & Expressions β’ Vocabulary & Expression Quiz
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πΆ Part 1 β Tutorial & Strategy
How to Master Matching Headings: A Complete, Exam-Ready Playbook
Goal: Choose the heading that best captures the main idea of each paragraph (A, B, C, β¦). Ignore βshinyβ details and match gist to gist.
Step 1 β Preview the Landscape Before You Read (10β20 sentences)
Start by scanning the entire list of headings to build a mental map of possible themes you might meet in the passage. Read quickly but attentively, noticing patterns such as causeβeffect, contrast, problemβsolution, and chronology. Pay attention to signal words inside headings like βhowever,β βas a result,β βdecline,β βexpansion,β or βtrade-off,β because these words forecast structure. Group similar headings together so you can later differentiate βnear-missβ options that look tempting. Identify any headings that sound very broad (e.g., βA shift in prioritiesβ) and any that sound highly specific (e.g., βA seasonal migration guided by currentsβ). Expect broad ones to fit paragraphs that synthesise ideas, and specific ones to fit paragraphs with a single focused development. Remind yourself that single vocabulary matches are unreliable; IELTS designers often place the same surface words in multiple paragraphs. Your mission is to understand the core function of each paragraphβdefinition, explanation, evidence, example, comparison, contrast, sequence, cause, effect, or evaluation. Decide on a working strategy: for example, βskim headings β skim paragraph β shortlist two headings β confirm with topic/concluding line.β By previewing like this, you prime your attention to notice structural cues rather than chase individual terms. This warm-up step reduces anxiety and speeds up later decisions. Treat the heading list as a βmenuβ of logical possibilities, not as a list of words to hunt. Visualise the passage as a set of rooms, each with a sign on the door; your job is to match sign to room by overall purpose. When you finally move to the passage, you will read faster and reject traps more confidently.
Step 2 β Skim Each Paragraph for Gist, Not Details (10β20 sentences)
Read paragraph A at a brisk pace to capture the overall message; avoid stopping for unknown words unless they block the whole meaning. Look closely at the topic sentence, which often sets the paragraphβs scope, and the final sentence, which commonly delivers a conclusion, contrast, or consequence. Watch for structural signals: βhowever,β βdespite,β and βyetβ announce contrast; βtherefore,β βas a result,β and βconsequentlyβ signal causeβeffect; βinitially,β βsubsequently,β and βfinallyβ mark sequences. Ask yourself, βWhat single idea would I write on the door of this paragraph?β If the paragraph begins with background and ends with a pivot, the heading will usually reflect the pivot or claim, not the background. Do not be tempted by a vivid exampleβexamples are bait; headings refer to the point that examples support. If a paragraph contains two mini-ideas, decide which is central by checking which one the evidence serves. Keep notes light: jot one 5β7 word gist line (e.g., βOverfishing disrupts reef balanceβ). Move on; do not perfect your wording at this stage. Efficient skimming keeps your working memory clear for precise matching later. If one paragraph feels dense, pause only long enough to paraphrase its core in your own words. Then continue; momentum is your ally in high-stakes timing.
Step 3 β Decode Heading Types and Match by Function (10β20 sentences)
Classify each heading by rhetorical function before matching: definition, description, process, chronology, comparison/contrast, causeβeffect, problemβsolution, hypothesis, evaluation, or recommendation. When a paragraph simply describes a phenomenon (appearance, features, distribution), you should prefer a βdescriptionβ type heading. If it explains why something happens, the correct heading will imply causation or mechanism. Where the paragraph proposes a remedy or response, βsolution,β βstrategy,β or βmanagementβ words in the heading are strong candidates. Contrast-driven paragraphs will include pivot terms like βhoweverβ and βby contrast,β so a heading hinting at βa shift,β βa reversal,β or βa surprising exceptionβ often fits. Process or chronology paragraphs rely on time markers; look for headings that suggest βstages,β βsequence,β or βevolution.β If the paragraph judges or weighs outcomes (benefit vs. risk), choose evaluative headings with words such as βtrade-off,β βbalancing,β or βreassessment.β For paragraphs that introduce uncertainty or ongoing inquiry, headings with βdebate,β βquestion,β or βhypothesisβ are likely. This function-first approach neutralises synonym traps because you anchor on purpose, not vocabulary overlap. Always ensure the entire paragraph fits the heading; a partial match is a warning sign. If two headings are similar, pick the one that captures the paragraphβs emphasis.
Step 4 β Shortlist, Eliminate, and Commit with Evidence (10β20 sentences)
For each paragraph, shortlist two plausible headings, then test each against the topic and concluding lines. Ask, βDoes every sentence in the paragraph make sense under this heading, or do some sentences feel orphaned?β Eliminate any heading that fails to include the paragraphβs final emphasis. If a heading is too general to exclude alternatives, search for a unique signalβcontrast markers, causal chains, or time sequenceβthat the other heading cannot explain. Cross off used headings to reduce later decision friction. Keep a running grid (e.g., AβF) where you pencil in your first choice plus a question mark if uncertain. After finishing all paragraphs, revisit the uncertain ones; context from later paragraphs often clarifies earlier choices. If time is tight, commit to your best-fit choice rather than leaving blanksβunanswered items guarantee zero. Remember that IELTS rarely repeats very similar headings for adjacent paragraphs; variety across the set is common. Trust a choice that aligns with both function and emphasis even if a single word seems mismatched. Evidence of correctness is coherence: the heading must βorganiseβ the paragraph naturally.
Step 5 β Disarm Common Traps (10β20 sentences)
Trap 1 is the word-match illusion: a heading repeats a striking noun from the paragraph, but the paragraphβs main idea is different; always verify function. Trap 2 is the example magnet: examples dominate the paragraph visually, but they merely illustrate a broader claim; choose the heading that names the claim. Trap 3 is the background decoy: historical or contextual sentences open the paragraph, while the key message arrives later; prefer the heading reflecting the end focus. Trap 4 is the scope mismatch: the heading is broader or narrower than the paragraph; ensure boundaries align. Trap 5 is the synonym shuffle: the correct heading uses paraphrases, not identical terms; train yourself to spot meaning twins (e.g., βdeclineβ ~ βdeterioration,β βbufferβ ~ βcushionβ). Trap 6 is the proper-noun distraction: names, places, or dates feel important but only serve as evidence; do not anchor the heading on them. Trap 7 is the double-contrast: a paragraph contrasts two ideas but ultimately endorses one; the heading will reflect the endorsed idea or the existence of contrast itselfβconfirm which emphasis wins. When stuck, paraphrase the paragraph in ten plain words and match that paraphrase to a heading. If two headings remain, choose the one that covers more sentences without forcing exceptions. Confidence comes from disciplined checking, not from word spotting.
Step 6 β Pace, Review, and Final Checks (10β20 sentences)
Allocate a strict time budget per set and protect it; speeding through clear matches buys minutes for tough ones. After your first pass, scan the remaining unused headingsβsometimes their wording makes the intended paragraph obvious in hindsight. Re-read the concluding line of any paragraph you doubted; IELTS writers often tuck the essence there. Verify that no two paragraphs have accidentally received the same highly specific heading; uniqueness usually prevails. Confirm that the distribution of heading types makes sense across the passage (not all βcauseβeffect,β for example). If you changed a heading, quickly re-validate earlier paragraphs that depended on the discarded option. Watch for consistency in your notes; the best choices feel natural when you restate the paragraphβs gist aloud. Keep micro-decisions moving to avoid cognitive fatigue. In the final minute, ensure every item is answeredβeducated guesses beat blanks. Breathe, reset, and move on; Reading success is cumulative.
Example Box 1 β Main Idea vs. Detail
Paragraph gist: βResearchers outline several threats to coral reefs but argue warming seas are the central driver of bleaching.β
Correct heading type: Causeβeffect (focus on the central driver), not a mere list of threats.
Why: Details (pollution, storms) appear, but the paragraphβs emphasis is the causal primacy of temperature rise.
Example Box 2 β Topic vs. Example
Paragraph gist: βAn Australian reef case study shows how herbivorous fish restore balance after bleaching.β
Correct heading type: Solution/recovery mechanism, not βDamage to reefs.β
Why: The example (Australia) serves the mechanism message: grazing limits algal overgrowth and enables coral recruitment.
Example Box 3 β Contrast Emphasis
Paragraph gist: βWhile marine parks limit fishing, runoff from land continues to degrade water quality.β
Correct heading type: Contrast or limitation of a strategy (e.g., βProtection with persistent pressuresβ).
Why: The pivot word βwhileβ signals the paragraphβs structural heart: gains vs. ongoing stressors.
Example Box 4 β Chronology/Process
Paragraph gist: βFrom larval drift to settlement and growth, corals pass through stages vulnerable to temperature and acidity.β
Correct heading type: Sequence/process (βStages in coral development under stressβ).
Why: Time markers and ordered phases dominate the paragraphβs structure.
Example Box 5 β Scope Check
Paragraph gist: βLocal reef restoration can help, but global emissions cuts are essential.β
Correct heading type: Evaluation/priority (βLocal actions versus global necessityβ).
Why: The paragraph weighs solutions and ranks them by impact; the heading must reflect the priority.
Example Box 6 β Synonym Trap
Paragraph gist: βBiodiversity cushions reefs against shocks.β
Correct heading words: βbuffer,β βresilience,β or βinsurance effect,β not necessarily βcushion.β
Why: The test often paraphrases; match meaning, not wording.
Universal βFill-in-the-Gapβ Answer Template (Sentence-by-Sentence)
Use these ready-made sentences to justify each match. Replace the brackets with your notes/words.
- Identification: βFor Paragraph [__], I propose Heading [__] because the paragraphβs main function is [description / causeβeffect / contrast / solution / sequence / evaluation].β
- Topic Focus: βThe topic sentence highlights [core subject], framing the discussion around [central idea].β
- Signal Words: βSignal words such as [however / therefore / initially / by contrast] indicate a [contrast / consequence / sequence] structure.β
- Evidence Role: βExamples like [example] serve to [illustrate / support / compare] the main claim rather than replace it.β
- Emphasis Check: βThe concluding line emphasises [key outcome/pivot], which aligns directly with the headingβs focus on [phrase].β
- Scope Match: βThe headingβs scope [broadly matches / precisely matches] the paragraph; it neither ignores [important sub-point] nor exceeds the boundaries.β
- Function Match: βBecause the paragraph primarily [explains / contrasts / sequences / evaluates], a heading about [function keyword] is more appropriate than [near-miss heading].β
- Trap Avoidance: βAlthough the paragraph mentions [distracting detail/word], this is a detail; the main idea is [restate gist].β
- Synonym Awareness: βThe paragraphβs term [term] corresponds to the headingβs phrase [paraphrase], confirming semantic equivalence.β
- Final Justification: βTherefore, Heading [__] best summarises Paragraph [__] by capturing its [dominant idea/function].β
One-Line Answer Pattern (for your sheet)
Paragraph [__] β Heading [__]: [function] β topic: [subject]; emphasis: [key point]; signals: [markers]; reject: [near-miss].
Quick Warm-Up (Apply the Template)
Micro-paragraph: βDespite restrictions on fishing, nutrient-rich runoff from farms continues to cloud coastal waters, weakening coralsβ energy supply and slowing recovery.β
Choose: A) βProtection that fails to stop a different threatβ β’ B) βAn ancient partnership with algaeβ β’ C) βA chain of warming eventsβ
Model justification (condensed): Function = contrast/limitation; emphasis = remaining land-based pressure; thus A fits best.
π· Part 2 β Reading Passage + Questions
[IELTS Academic] [Reading: Matching Headings] β Task
Instructions: Match the headings (iβxii) to the paragraphs (AβH). Write the correct Roman numeral next to each paragraph. There are more headings than paragraphs. Focus on the main idea of each paragraph.
β³ Countdown Timer
List of Headings
- A solar partnership that builds limestone cities
- A tiny area hosting an outsized share of life
- Larval highways that connect distant reefs
- Grazers that keep algae in check
- Local pressures that protected areas donβt stop
- Why global cuts outrank local fixes
- Engineering resilienceβpromise and risks
- New eyes on reefs: mapping and monitoring
- Storms and cyclones as ecological reset buttons
- Reading the past in coral skeletons
- Competing human claims over reef resources
- The limits of short-term restoration
There are more headings than paragraphs. Use each heading once at most.
Reading Passage β Coral Reefs and Marine Biodiversity
Paragraph A β Coral reefs are constructed by countless tiny polyps that secrete calcium carbonate skeletons, but their astonishing productivity depends on a compact energy alliance. Inside coral tissues live symbiotic microalgae that harvest sunlight and share the sugars they make, underwriting the coralsβ energy budget in nutrient-poor tropical seas. When seas become too hot, the partnership breaks down and the corals expel their algal tenants, losing colour and much of their energy supply. The reefβs architectural capacityβits limestone βcity-buildingββrises and falls with this solar collaboration.
Paragraph B β Although reefs occupy a minute fraction of the ocean floor, they provide living space, feeding grounds, and nursery habitats for a disproportionately large share of marine species. Crevices and branching structures multiply niches, allowing species to coexist by specialising in microhabitats or feeding times. This complexity attracts invertebrates and fish that support predators, forming intricate food webs. Biodiversity on reefs is not merely a catalogue of species; it stabilises ecosystem functions and maintains productivity in the face of stress.
Paragraph C β Reefs are not isolated outcrops; they are linked by flows of larvae riding seasonal currents. These microscopic drifters can travel days to weeks before settling, creating genetic exchange among reefs that may lie hundreds of kilometres apart. Some reefs act as consistent βsources,β exporting young to replenish others repeatedly damaged by heat, cyclones, or starfish. This connectivity shapes patterns of recovery and means effective management often depends on cooperation across political boundaries.
Paragraph D β After disturbances, the balance between algae and corals can tip abruptly. Herbivorous fishes such as parrotfish and surgeonfish, along with sea urchins, graze down fast-growing algae that would otherwise smother young corals. Where herbivores are depleted, reefs risk a βphase shiftβ to algal dominance that is difficult to reverse. Maintaining diverse grazer communities supplies redundancy: if one group declines, others fill the role and preserve conditions needed for coral recovery.
Paragraph E β Even strictly protected areas cannot fence out all threats. Sediment and nutrients from land can cloud the water, curbing the light that fuels symbiosis and boosting algal blooms. Coastal development alters currents and increases turbidity. Plastics and chemicals add chronic stress. Marine parks regulate fishing, but rarely fertiliser use or storm-water upstream. Thus, improvements inside boundaries can be offset by pressures from the watershed, leaving reefs healthier than before yet far from secure.
Paragraph F β Local action matters, but it cannot rewrite the physics of heat in a warming world. Marine heatwaves now strike more often and last longer, pushing corals beyond thermal thresholds despite careful stewardship. Water quality projects and fishery rules buy time; they do not change the frequency of bleaching events set by global greenhouse gases. Reef futures hinge on emissions trajectories: rapid cuts reduce damage pace, while delay narrows the window for resilience.
Paragraph G β Faced with accelerating change, researchers test interventions, from gardening fragments in nurseries to selecting heat-tolerant strains and tweaking coral microbiomes. These methods can speed local recovery or seed hardier lineages, yet they entail trade-offs. Large-scale planting may favour a few genotypes; assisted evolution raises governance and ethical questions; interventions that succeed in one site may falter elsewhere. Such strategies complement, not substitute, reducing the stresses that force reefs into triage.
Paragraph H β Monitoring is being transformed by new tools. Satellites track sea-surface temperatures; autonomous loggers record seabed heat; underwater photogrammetry converts images into 3-D maps; and environmental DNA reveals hidden residents. Combined with machine learning, these data provide earlier warnings and clearer baselines, helping managers test whether policies genuinely bend ecological trends rather than merely stabilise appearances.
Answer Sheet
Your Selections
π£ Part 3 β Answer Key
[IELTS Academic] [Reading: Matching Headings] β Sample Answer
Model Answer Key
Paragraph A β I β A solar partnership that builds limestone cities
Paragraph B β II β A tiny area hosting an outsized share of life
Paragraph C β III β Larval highways that connect distant reefs
Paragraph D β IV β Grazers that keep algae in check
Paragraph E β V β Local pressures that protected areas donβt stop
Paragraph F β VI β Why global cuts outrank local fixes
Paragraph G β VII β Engineering resilienceβpromise and risks
Paragraph H β VIII β New eyes on reefs: mapping and monitoring
Reasoning for Paragraph A
The paragraph emphasises the symbiotic relationship between coral polyps and algae, highlighting how this partnership fuels reef construction. Although other details appear (nutrient recycling, bleaching), the main idea is that coral βcity-buildingβ depends on a solar alliance. This matches Heading I directly. The trap could be choosing a heading about bleaching, but bleaching is only a consequence, not the theme.
Reasoning for Paragraph B
Here the writer stresses that reefs occupy a small spatial area but host a disproportionately large number of species. Complexity of habitat, niches, and food webs all reinforce this. That clearly matches Heading II. The wrong trap would be to choose a heading about grazers or connectivity, but those details are absent here.
Reasoning for Paragraph C
This paragraph focuses on how larvae disperse across currents, linking distant reefs. Phrases like βnot isolated outcropsβ and βgenetic exchangeβ highlight connectivity. Thus Heading III is the fit. Other headings like biodiversity or monitoring are too broad; only the concept of βlarval highwaysβ captures the essence.
Reasoning for Paragraph D
The emphasis here is on herbivores (parrotfish, surgeonfish, urchins) preventing algae from overwhelming corals. The phrase βphase shift to algal dominanceβ is central. The key idea is grazing control, so Heading IV is correct. A potential trap would be biodiversity (since grazers are diverse), but the function here is control of algae.
Reasoning for Paragraph E
This paragraph makes clear that even protected zones cannot block land-based threats like sediment and pollution. Thus the heading that fits is about βlocal pressures that protected areas donβt stop.β It is not about global warming (Paragraph F handles that), and it is not about resilience engineering (Paragraph G). Hence Heading V is correct.
Reasoning for Paragraph F
The paragraph explicitly argues that local actions cannot counteract global warming and heatwaves. The conclusion: emissions cuts at global scale matter most. Therefore, Heading VI is the answer. The trap might be to select local pressures, but the emphasis is on scaleβlocal vs. global. The heading captures that hierarchy clearly.
Reasoning for Paragraph G
This paragraph outlines new methodsβnursery planting, microbiome tweaks, assisted evolutionβand then critiques them. The repeated message is: interventions have promise but also risks. This aligns exactly with Heading VII. The trap would be to call this βshort-term restoration,β but the text stresses the dual nature: potential and trade-offs.
Reasoning for Paragraph H
The entire paragraph focuses on new monitoring tools: satellites, loggers, photogrammetry, eDNA, machine learning. These give better baselines and policy testing. This is perfectly summarised by Heading VIII: βNew eyes on reefs: mapping and monitoring.β No other heading addresses technological observation.
Overall Strategy Reflection
Notice how each correct heading captures the main function of the paragraph. The traps often arise from attractive detail (e.g., bleaching, biodiversity, examples). By focusing on paragraph emphasis, topic sentences, and concluding lines, we eliminate near misses. This is the discipline required for high-band IELTS reading performance.
π’ Part 4 β Vocabulary
[IELTS Academic] [Reading: Matching Headings] β Vocabulary Builder
Below are 20 key academic words from the passage. Each entry includes pronunciation, grammar patterns, definitions, examples, synonyms, and common learner mistakes.
Symbiosis /ΛsΙͺm.biΛΙΚ.sΙͺs/ (BrE), /ΛsΙͺm.baΙͺΛoΚ.sΙͺs/ (AmE)
Noun β pattern: symbiosis between X and Y
Definition: A close biological relationship where two organisms benefit from living together.
Example: βCorals rely on symbiosis with algae for energy.β (Means: corals survive because of algae partnership.)
Synonyms: mutualism, partnership.
Common mistakes: β Saying βa symbiosisβ for one partner alone; β confusing with βsymbolismβ; β using it for non-biological friendships casually.
Polyps /ΛpΙ.lΙͺps/ (BrE), /ΛpΙΛ.lΙͺps/ (AmE)
Noun (plural) β coral polyps
Definition: Small marine animals that build corals by secreting calcium carbonate.
Example: βCoral polyps create skeletons that form reefs.β (Means: tiny animals are reef builders.)
Synonyms: coral organisms.
Common mistakes: β Thinking they are plants; β mispronouncing as βpoliceβ; β using singular incorrectly (βa polypβ not βa polypsβ).
Limestone /ΛlaΙͺm.stΙΚn/ (BrE), /ΛlaΙͺm.stoΚn/ (AmE)
Noun β limestone reef, limestone rock
Definition: A hard sedimentary rock composed mainly of calcium carbonate, often built by marine organisms.
Example: βReefs are vast limestone structures.β (Means: reefs are rock formations built from coral.)
Synonyms: carbonate rock.
Common mistakes: β Confusing with βlimeβ (the fruit); β spelling as βlimestonee.β
Bleaching /ΛbliΛ.tΚΙͺΕ/ (BrE & AmE)
Noun/Verb (process) β coral bleaching
Definition: The loss of colour in corals when they expel algae due to stress, usually heat.
Example: βCoral bleaching weakens the reefβs energy supply.β
Synonyms: whitening, fading.
Common mistakes: β Using as only laundry-related; β confusing with βbleachβ chemical use.
Biodiversity /ΛbaΙͺ.ΙΚ.daΙͺΛvΙΛ.sΙͺ.ti/ (BrE), /ΛbaΙͺ.oΚ.dΙͺΛvΙΛ.sΙ.tΜ¬i/ (AmE)
Noun β high/low biodiversity
Definition: The variety of species, genes, and ecosystems in a region.
Example: βReefs are hotspots of biodiversity.β
Synonyms: biological variety, ecological richness.
Common mistakes: β Saying βa biodiversityβ; β using only for plants not animals.
Niches /niΛΚ/ or /nΙͺtΚ/ (BrE), /niΛtΚ/ or /nΙͺtΚ/ (AmE)
Noun (plural) β ecological niche
Definition: The role and position of a species in an ecosystem, including habitat and food use.
Example: βDifferent fish occupy different niches on the reef.β
Synonyms: ecological role, habitat slot.
Common mistakes: β Pronouncing like βnitchβ only; β confusing with βniche marketβ in business context.
Larvae /ΛlΙΛ.viΛ/ (BrE), /ΛlΙΛr.viΛ/ (AmE)
Noun (plural of larva)
Definition: Early life stage of many animals, often planktonic before settling.
Example: βCoral larvae drift on currents before settling.β
Synonyms: immature stage, hatchlings.
Common mistakes: β Saying βlarvasβ (incorrect plural); β confusing with βlava.β
Connectivity /ΛkΙn.ekΛtΙͺv.Ιͺ.ti/ (BrE), /ΛkΙΛ.nekΛtΙͺv.Ι.tΜ¬i/ (AmE)
Noun β ecological connectivity
Definition: The degree to which populations or habitats are linked by movement or exchange.
Example: βLarval connectivity ensures reef recovery.β
Synonyms: interconnection, linkage.
Common mistakes: β Using as only βinternet connection.β
Herbivorous /hΙΛΛbΙͺv.Ιr.Ιs/ (BrE), /ΛhΙΛ.bΙ.vΙΛr.Ιs/ (AmE)
Adjective β herbivorous fish
Definition: Feeding mainly on plants or algae.
Example: βHerbivorous fish stop algae from covering corals.β
Synonyms: plant-eating.
Common mistakes: β Pronouncing like βher-bye-voreβ; β confusing with βcarnivorous.β
Phase shift /feΙͺz ΚΙͺft/ (BrE & AmE)
Noun phrase β a phase shift to algal dominance
Definition: A sudden large change in ecosystem state.
Example: βOverfishing triggers a phase shift in reefs.β
Synonyms: regime shift, transformation.
Common mistakes: β Thinking it is about physics only; β writing βface shift.β
Sediment /ΛsΙd.Ιͺ.mΙnt/ (BrE), /ΛsΙd.Ι.mΙnt/ (AmE)
Noun β sediment runoff
Definition: Small particles of soil or rock carried by water and deposited elsewhere.
Example: βSediment clouds the water, blocking light.β
Synonyms: deposits, silt.
Common mistakes: β Using βsedimentationβ and βsedimentβ interchangeably.
Turbidity /tΙΛΛbΙͺd.Ιͺ.ti/ (BrE), /tΙΛΛbΙͺd.Ι.tΜ¬i/ (AmE)
Noun β water turbidity
Definition: Cloudiness of a fluid caused by suspended particles.
Example: βHigh turbidity reduces coral photosynthesis.β
Synonyms: murkiness, cloudiness.
Common mistakes: β Pronouncing as βturbulity.β
Chronic /ΛkrΙn.Ιͺk/ (BrE), /ΛkrΙΛ.nΙͺk/ (AmE)
Adjective β chronic stress
Definition: Long-lasting and persistent (often negative).
Example: βChemicals cause chronic damage to reefs.β
Synonyms: persistent, long-term.
Common mistakes: β Misusing as βseriousβ only.
Trajectory /trΙΛdΚek.tΙr.i/ (BrE), /trΙΛdΚek.tΙΛr.i/ (AmE)
Noun β emissions trajectory
Definition: The path or trend followed over time.
Example: βReef survival depends on emission trajectories.β
Synonyms: path, course, trend.
Common mistakes: β Saying βtrajectorysβ instead of βtrajectories.β
Interventions /ΛΙͺn.tΙΛven.ΚΙnz/ (BrE), /ΛΙͺn.tΙΛven.ΚΙnz/ (AmE)
Noun (plural) β policy or medical/ecological interventions
Definition: Actions designed to improve a situation.
Example: βRestoration interventions include coral nurseries.β
Synonyms: measures, strategies.
Common mistakes: β Using singular when plural is needed.
Genotypes /ΛdΚiΛ.nΙ.taΙͺps/ (BrE & AmE)
Noun (plural) β genetic make-up
Definition: The genetic constitution of an organism.
Example: βRestoration may overuse certain genotypes.β
Synonyms: genetic types, DNA profiles.
Common mistakes: β Writing βgenos.β
Ethical /ΛΙΞΈ.Ιͺ.kΙl/ (BrE), /ΛΙΞΈ.Ι.kΙl/ (AmE)
Adjective β ethical questions
Definition: Concerning what is morally right or wrong.
Example: βGenetic modification raises ethical debates.β
Synonyms: moral, principled.
Common mistakes: β Confusing with βethnical.β
Photogrammetry /ΛfΙΚ.tΙΚΛΙ‘rΓ¦m.Ιͺ.tri/ (BrE), /ΛfoΚ.tΜ¬oΚΛΙ‘rΓ¦m.Ι.tri/ (AmE)
Noun β underwater photogrammetry
Definition: The science of using photos to create precise measurements or 3D maps.
Example: βPhotogrammetry maps coral reefs accurately.β
Synonyms: 3D mapping, image-based surveying.
Common mistakes: β Mispronouncing as βphotogeometry.β
Baseline /ΛbeΙͺs.laΙͺn/ (BrE & AmE)
Noun β ecological baseline
Definition: A starting point used for comparison.
Example: βDNA sampling sets a baseline for species monitoring.β
Synonyms: reference point, standard.
Common mistakes: β Using only in sports contexts.
π Part 5 β Phrases & Expressions
[IELTS Academic] [Reading: Matching Headings] β Phrases & Expressions
Here are 20 academic phrases and expressions from the passage, explained with pronunciation, usage, and examples.
Energy alliance /ΛΙn.Ι.dΚi ΙΛlaΙͺ.Ιns/
Noun phrase β a cooperative energy-sharing relationship.
Definition: A partnership where two entities provide mutual energy benefits.
Example: βCorals and algae form an energy alliance.β (Means: they share resources for survival.)
Synonyms: energy partnership.
Mistakes: β Using only for politics; β confusing with βpower company alliance.β
Limestone city-building /ΛlaΙͺm.stΙΚn ΛsΙͺt.i ΛbΙͺl.dΙͺΕ/
Noun phrase β reefs as builders of massive rock-like structures.
Example: βReefs engage in limestone city-building.β
Synonyms: reef architecture.
Mistakes: β Literal cities; β thinking it refers to human construction.
Expel algae /ΙͺkΛspΙl ΛΓ¦l.dΚiΛ/
Verb phrase β to force algae out.
Definition: The process corals undergo during stress.
Example: βCorals expel algae when overheated.β
Synonyms: eject algae, release algae.
Mistakes: β Saying βexplode algae.β
Outsized share /ΛaΚtΛsaΙͺzd ΚeΙ/ (BrE), /ΛaΚtΛsaΙͺzd Κer/ (AmE)
Noun phrase β disproportionately large portion.
Example: βReefs host an outsized share of marine species.β
Synonyms: disproportionate amount.
Mistakes: β Writing βoutside share.β
Intricate food webs /ΛΙͺn.trΙͺ.kΙt fuΛd webz/
Noun phrase β complex feeding relationships.
Example: βReefs sustain intricate food webs.β
Synonyms: complex ecosystems.
Mistakes: β Using βwebsites.β
Genetic exchange /dΚΙΛnΙt.Ιͺk ΙͺksΛtΚeΙͺndΚ/
Noun phrase β sharing of genes among populations.
Example: βLarvae promote genetic exchange.β
Synonyms: gene flow.
Mistakes: β Thinking it is about currency.
Source reefs /sΙΛs riΛfs/
Noun phrase β reefs that provide larvae to others.
Example: βSource reefs repopulate damaged areas.β
Synonyms: larval donors.
Mistakes: β Confusing with βsauce reefs.β
Phase shift to algal dominance /feΙͺz ΚΙͺft tuΛ ΛΓ¦l.Ι‘Ιl ΛdΙm.Ιͺ.nΙns/
Noun phrase β major ecosystem change.
Example: βOverfishing risks a phase shift to algal dominance.β
Synonyms: ecological regime shift.
Mistakes: β Misheard as βface shift.β
Functional redundancy /ΛfΚΕk.ΚΙn.Ιl rΙͺΛdΚn.dΙn.si/
Noun phrase β overlap in ecological roles.
Example: βDiverse grazers ensure functional redundancy.β
Synonyms: role overlap.
Mistakes: β Using only in job loss contexts.
Fence out threats /fΙns aΚt ΞΈrΙts/
Verb phrase β block or exclude dangers.
Example: βMarine parks cannot fence out pollution.β
Synonyms: keep out, block.
Mistakes: β Using literally only with gardens.
Chronic stress /ΛkrΙn.Ιͺk strΙs/
Noun phrase β long-term harmful pressure.
Example: βPlastics impose chronic stress on reefs.β
Synonyms: persistent pressure.
Mistakes: β Misusing as βserious stress.β
Rewrite the physics /ΛriΛΛraΙͺt Γ°Ι ΛfΙͺz.Ιͺks/
Verb phrase β attempt the impossible in natural law.
Example: βLocal action cannot rewrite the physics of heat.β
Synonyms: defy natureβs laws.
Mistakes: β Taking literally as changing physics books.
Emissions trajectories /ΙͺΛmΙͺΚ.Ιnz trΙΛdΚek.tΙr.i/
Noun phrase β future trends in greenhouse gas output.
Example: βReef survival depends on emissions trajectories.β
Synonyms: emission paths.
Mistakes: β Writing βtrajectoriesβ as βtrajections.β
Seed hardier lineages /siΛd ΛhΙΛ.di.Ιr ΛlΙͺn.i.ΙͺdΚΙͺz/
Verb phrase β establish tougher generations.
Example: βRestoration may seed hardier lineages.β
Synonyms: propagate stronger strains.
Mistakes: β Confusing βlineageβ with βlanguage.β
Ethical questions /ΛΙΞΈ.Ιͺ.kΙl ΛkwΙs.tΚΙnz/
Noun phrase β moral issues for debate.
Example: βGenetic editing raises ethical questions.β
Synonyms: moral dilemmas.
Mistakes: β Writing βethnical.β
Transform monitoring /trΓ¦nsΛfΙΛm ΛmΙn.Ιͺ.tΙr.ΙͺΕ/
Verb phrase β radically change observation practices.
Example: βSatellites transform monitoring of reefs.β
Synonyms: revolutionise observation.
Mistakes: β Misusing as βtransport monitoring.β
Environmental DNA /ΙͺnΛvaΙͺ.rΙnΛmΙn.tΙl ΛdiΛ.enΛeΙͺ/
Noun phrase β DNA traces found in the environment.
Example: βEnvironmental DNA reveals hidden species.β
Synonyms: eDNA sampling.
Mistakes: β Thinking it means βenvironment-friendly DNA.β
Bend ecological trends /bΙnd ΛiΛ.kΙΛlΙdΚ.Ιͺ.kΙl trΙndz/
Verb phrase β change the direction of environmental patterns.
Example: βPolicies aim to bend ecological trends.β
Synonyms: shift trajectories, alter paths.
Mistakes: β Taking βbendβ literally as curve physically.
Stabilise appearances /ΛsteΙͺ.bΙͺ.laΙͺz ΙΛpΙͺΙ.rΙnsΙͺz/
Verb phrase β make things look steady without solving causes.
Example: βSuperficial measures stabilise appearances.β
Synonyms: maintain image, mask decline.
Mistakes: β Confusing with personal looks.
πΊ Part 6 β Vocabulary & Expressions Quiz
[IELTS Academic] [Reading: Matching Headings] β Interactive Exercise
You have a pool of 50 questions based on the vocabulary and expressions from Parts 4 & 5. Each attempt will randomly show 10 questions. After each answer, youβll see a detailed explanation.