πŸ”Ά 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, …). Ignore β€œshiny” details and match gist to gist.

Step 1 β€” Preview the Landscape Before You Read (10–20 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 cause–effect, contrast, problem–solution, and chronology. Pay attention to signal words inside headings like β€œhowever,” β€œas a result,” β€œdecline,” β€œexpansion,” or β€œtrade-off,” because these words forecast structure. Group similar headings together so you can later differentiate β€œnear-miss” options that look tempting. Identify any headings that sound very broad (e.g., β€œA shift in priorities”) and any that sound highly specific (e.g., β€œA seasonal migration guided by currents”). 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 paragraphβ€”definition, explanation, evidence, example, comparison, contrast, sequence, cause, effect, or evaluation. Decide on a working strategy: for example, β€œskim headings β†’ skim paragraph β†’ shortlist two headings β†’ confirm with topic/concluding line.” 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 β€œmenu” 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 (10–20 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 paragraph’s scope, and the final sentence, which commonly delivers a conclusion, contrast, or consequence. Watch for structural signals: β€œhowever,” β€œdespite,” and β€œyet” announce contrast; β€œtherefore,” β€œas a result,” and β€œconsequently” signal cause–effect; β€œinitially,” β€œsubsequently,” and β€œfinally” mark sequences. Ask yourself, β€œWhat single idea would I write on the door of this paragraph?” 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 exampleβ€”examples 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 5–7 word gist line (e.g., β€œOverfishing disrupts reef balance”). 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 (10–20 sentences)

Classify each heading by rhetorical function before matching: definition, description, process, chronology, comparison/contrast, cause–effect, problem–solution, hypothesis, evaluation, or recommendation. When a paragraph simply describes a phenomenon (appearance, features, distribution), you should prefer a β€œdescription” type heading. If it explains why something happens, the correct heading will imply causation or mechanism. Where the paragraph proposes a remedy or response, β€œsolution,” β€œstrategy,” or β€œmanagement” words in the heading are strong candidates. Contrast-driven paragraphs will include pivot terms like β€œhowever” and β€œby contrast,” so a heading hinting at β€œa shift,” β€œa reversal,” or β€œa surprising exception” often fits. Process or chronology paragraphs rely on time markers; look for headings that suggest β€œstages,” β€œsequence,” or β€œevolution.” If the paragraph judges or weighs outcomes (benefit vs. risk), choose evaluative headings with words such as β€œtrade-off,” β€œbalancing,” or β€œreassessment.” For paragraphs that introduce uncertainty or ongoing inquiry, headings with β€œdebate,” β€œquestion,” or β€œhypothesis” 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 paragraph’s emphasis.

Step 4 β€” Shortlist, Eliminate, and Commit with Evidence (10–20 sentences)

For each paragraph, shortlist two plausible headings, then test each against the topic and concluding lines. Ask, β€œDoes every sentence in the paragraph make sense under this heading, or do some sentences feel orphaned?” Eliminate any heading that fails to include the paragraph’s final emphasis. If a heading is too general to exclude alternatives, search for a unique signalβ€”contrast markers, causal chains, or time sequenceβ€”that the other heading cannot explain. Cross off used headings to reduce later decision friction. Keep a running grid (e.g., A–F) 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 blanksβ€”unanswered 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 β€œorganise” the paragraph naturally.

Step 5 β€” Disarm Common Traps (10–20 sentences)

Trap 1 is the word-match illusion: a heading repeats a striking noun from the paragraph, but the paragraph’s 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., β€œdecline” ~ β€œdeterioration,” β€œbuffer” ~ β€œcushion”). 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 itselfβ€”confirm 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 (10–20 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 headingsβ€”sometimes 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 β€œcause–effect,” 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 paragraph’s gist aloud. Keep micro-decisions moving to avoid cognitive fatigue. In the final minute, ensure every item is answeredβ€”educated guesses beat blanks. Breathe, reset, and move on; Reading success is cumulative.

Example Box 1 β€” Main Idea vs. Detail

Paragraph gist: β€œResearchers outline several threats to coral reefs but argue warming seas are the central driver of bleaching.”

Correct heading type: Cause–effect (focus on the central driver), not a mere list of threats.

Why: Details (pollution, storms) appear, but the paragraph’s emphasis is the causal primacy of temperature rise.

Example Box 2 β€” Topic vs. Example

Paragraph gist: β€œAn Australian reef case study shows how herbivorous fish restore balance after bleaching.”

Correct heading type: Solution/recovery mechanism, not β€œDamage to reefs.”

Why: The example (Australia) serves the mechanism message: grazing limits algal overgrowth and enables coral recruitment.

Example Box 3 β€” Contrast Emphasis

Paragraph gist: β€œWhile marine parks limit fishing, runoff from land continues to degrade water quality.”

Correct heading type: Contrast or limitation of a strategy (e.g., β€œProtection with persistent pressures”).

Why: The pivot word β€œwhile” signals the paragraph’s structural heart: gains vs. ongoing stressors.

Example Box 4 β€” Chronology/Process

Paragraph gist: β€œFrom larval drift to settlement and growth, corals pass through stages vulnerable to temperature and acidity.”

Correct heading type: Sequence/process (β€œStages in coral development under stress”).

Why: Time markers and ordered phases dominate the paragraph’s structure.

Example Box 5 β€” Scope Check

Paragraph gist: β€œLocal reef restoration can help, but global emissions cuts are essential.”

Correct heading type: Evaluation/priority (β€œLocal actions versus global necessity”).

Why: The paragraph weighs solutions and ranks them by impact; the heading must reflect the priority.

Example Box 6 β€” Synonym Trap

Paragraph gist: β€œBiodiversity cushions reefs against shocks.”

Correct heading words: β€œbuffer,” β€œresilience,” or β€œinsurance effect,” not necessarily β€œcushion.”

Why: The test often paraphrases; match meaning, not wording.

Universal β€œFill-in-the-Gap” Answer Template (Sentence-by-Sentence)

Use these ready-made sentences to justify each match. Replace the brackets with your notes/words.

  1. Identification: β€œFor Paragraph [__], I propose Heading [__] because the paragraph’s main function is [description / cause–effect / contrast / solution / sequence / evaluation].”
  2. Topic Focus: β€œThe topic sentence highlights [core subject], framing the discussion around [central idea].”
  3. Signal Words: β€œSignal words such as [however / therefore / initially / by contrast] indicate a [contrast / consequence / sequence] structure.”
  4. Evidence Role: β€œExamples like [example] serve to [illustrate / support / compare] the main claim rather than replace it.”
  5. Emphasis Check: β€œThe concluding line emphasises [key outcome/pivot], which aligns directly with the heading’s focus on [phrase].”
  6. Scope Match: β€œThe heading’s scope [broadly matches / precisely matches] the paragraph; it neither ignores [important sub-point] nor exceeds the boundaries.”
  7. Function Match: β€œBecause the paragraph primarily [explains / contrasts / sequences / evaluates], a heading about [function keyword] is more appropriate than [near-miss heading].”
  8. Trap Avoidance: β€œAlthough the paragraph mentions [distracting detail/word], this is a detail; the main idea is [restate gist].”
  9. Synonym Awareness: β€œThe paragraph’s term [term] corresponds to the heading’s phrase [paraphrase], confirming semantic equivalence.”
  10. Final Justification: β€œTherefore, Heading [__] best summarises Paragraph [__] by capturing its [dominant idea/function].”
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: β€œDespite restrictions on fishing, nutrient-rich runoff from farms continues to cloud coastal waters, weakening corals’ energy supply and slowing recovery.”

Choose: A) β€œProtection that fails to stop a different threat” β€’ B) β€œAn ancient partnership with algae” β€’ C) β€œA chain of warming events”

Model justification (condensed): Function = contrast/limitation; emphasis = remaining land-based pressure; thus A fits best.

πŸ”· Part 2 β€” Reading Passage + Questions

[IELTS Academic] [Reading: Matching Headings] β€” Task

Instructions: Match the headings (i–xii) to the paragraphs (A–H). Write the correct Roman numeral next to each paragraph. There are more headings than paragraphs. Focus on the main idea of each paragraph.

⏳ Countdown Timer
20:00
List of Headings
  1. A solar partnership that builds limestone cities
  2. A tiny area hosting an outsized share of life
  3. Larval highways that connect distant reefs
  4. Grazers that keep algae in check
  5. Local pressures that protected areas don’t stop
  6. Why global cuts outrank local fixes
  7. Engineering resilienceβ€”promise and risks
  8. New eyes on reefs: mapping and monitoring
  9. Storms and cyclones as ecological reset buttons
  10. Reading the past in coral skeletons
  11. Competing human claims over reef resources
  12. 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 corals’ 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 reef’s architectural capacityβ€”its limestone β€œcity-building”—rises 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 β€œsources,” 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 β€œphase shift” 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

    
🟣 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 don’t stop

Paragraph F β†’ VI β€” Why global cuts outrank local fixes

Paragraph G β†’ VII β€” Engineering resilienceβ€”promise 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 β€œcity-building” 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 β€œnot isolated outcrops” and β€œgenetic exchange” highlight connectivity. Thus Heading III is the fit. Other headings like biodiversity or monitoring are too broad; only the concept of β€œlarval highways” captures the essence.

Reasoning for Paragraph D

The emphasis here is on herbivores (parrotfish, surgeonfish, urchins) preventing algae from overwhelming corals. The phrase β€œphase shift to algal dominance” 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 β€œlocal pressures that protected areas don’t stop.” 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 scaleβ€”local vs. global. The heading captures that hierarchy clearly.

Reasoning for Paragraph G

This paragraph outlines new methodsβ€”nursery planting, microbiome tweaks, assisted evolutionβ€”and 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 β€œshort-term restoration,” 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: β€œNew eyes on reefs: mapping and monitoring.” 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.

🟒 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 /ˌsΙͺm.biΛˆΙ™ΚŠ.sΙͺs/ (BrE), /ˌsΙͺm.baΙͺˈoʊ.sΙͺs/ (AmE)

Noun β€” pattern: symbiosis between X and Y

Definition: A close biological relationship where two organisms benefit from living together.

Example: β€œCorals rely on symbiosis with algae for energy.” (Means: corals survive because of algae partnership.)

Synonyms: mutualism, partnership.

Common mistakes: ❌ Saying β€œa symbiosis” for one partner alone; ❌ confusing with β€œsymbolism”; ❌ using it for non-biological friendships casually.

Polyps /ˈpΙ’.lΙͺps/ (BrE), /ˈpɑː.lΙͺps/ (AmE)

Noun (plural) β€” coral polyps

Definition: Small marine animals that build corals by secreting calcium carbonate.

Example: β€œCoral polyps create skeletons that form reefs.” (Means: tiny animals are reef builders.)

Synonyms: coral organisms.

Common mistakes: ❌ Thinking they are plants; ❌ mispronouncing as β€˜police’; ❌ using singular incorrectly (β€œa polyp” not β€œa polyps”).

Limestone /ˈlaΙͺm.stΙ™ΚŠn/ (BrE), /ˈlaΙͺm.stoʊn/ (AmE)

Noun β€” limestone reef, limestone rock

Definition: A hard sedimentary rock composed mainly of calcium carbonate, often built by marine organisms.

Example: β€œReefs are vast limestone structures.” (Means: reefs are rock formations built from coral.)

Synonyms: carbonate rock.

Common mistakes: ❌ Confusing with β€œlime” (the fruit); ❌ spelling as β€œlimestonee.”

Bleaching /ˈbliː.tΚƒΙͺΕ‹/ (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: β€œCoral bleaching weakens the reef’s energy supply.”

Synonyms: whitening, fading.

Common mistakes: ❌ Using as only laundry-related; ❌ confusing with β€œbleach” chemical use.

Biodiversity /ˌbaΙͺ.Ι™ΚŠ.daΙͺˈvɜː.sΙͺ.ti/ (BrE), /ˌbaΙͺ.oʊ.dΙͺˈvɝː.sΙ™.tΜ¬i/ (AmE)

Noun β€” high/low biodiversity

Definition: The variety of species, genes, and ecosystems in a region.

Example: β€œReefs are hotspots of biodiversity.”

Synonyms: biological variety, ecological richness.

Common mistakes: ❌ Saying β€œa biodiversity”; ❌ using only for plants not animals.

Niches /niːʃ/ or /nΙͺtΚƒ/ (BrE), /niːtΚƒ/ or /nΙͺtΚƒ/ (AmE)

Noun (plural) β€” ecological niche

Definition: The role and position of a species in an ecosystem, including habitat and food use.

Example: β€œDifferent fish occupy different niches on the reef.”

Synonyms: ecological role, habitat slot.

Common mistakes: ❌ Pronouncing like β€œnitch” only; ❌ confusing with β€œniche market” in business context.

Larvae /ˈlɑː.viː/ (BrE), /ˈlɑːr.viː/ (AmE)

Noun (plural of larva)

Definition: Early life stage of many animals, often planktonic before settling.

Example: β€œCoral larvae drift on currents before settling.”

Synonyms: immature stage, hatchlings.

Common mistakes: ❌ Saying β€œlarvas” (incorrect plural); ❌ confusing with β€œlava.”

Connectivity /ˌkΙ’n.ekˈtΙͺv.Ιͺ.ti/ (BrE), /ˌkɑː.nekˈtΙͺv.Ι™.tΜ¬i/ (AmE)

Noun β€” ecological connectivity

Definition: The degree to which populations or habitats are linked by movement or exchange.

Example: β€œLarval connectivity ensures reef recovery.”

Synonyms: interconnection, linkage.

Common mistakes: ❌ Using as only β€œinternet connection.”

Herbivorous /hɜːˈbΙͺv.Ι™r.Ι™s/ (BrE), /ˈhɝː.bΙ™.vɔːr.Ι™s/ (AmE)

Adjective β€” herbivorous fish

Definition: Feeding mainly on plants or algae.

Example: β€œHerbivorous fish stop algae from covering corals.”

Synonyms: plant-eating.

Common mistakes: ❌ Pronouncing like β€œher-bye-vore”; ❌ confusing with β€œcarnivorous.”

Phase shift /feΙͺz ΚƒΙͺft/ (BrE & AmE)

Noun phrase β€” a phase shift to algal dominance

Definition: A sudden large change in ecosystem state.

Example: β€œOverfishing triggers a phase shift in reefs.”

Synonyms: regime shift, transformation.

Common mistakes: ❌ Thinking it is about physics only; ❌ writing β€œface shift.”

Sediment /ˈsΙ›d.Ιͺ.mΙ™nt/ (BrE), /ˈsΙ›d.Ι™.mΙ™nt/ (AmE)

Noun β€” sediment runoff

Definition: Small particles of soil or rock carried by water and deposited elsewhere.

Example: β€œSediment clouds the water, blocking light.”

Synonyms: deposits, silt.

Common mistakes: ❌ Using β€œsedimentation” and β€œsediment” interchangeably.

Turbidity /tɜːˈbΙͺd.Ιͺ.ti/ (BrE), /tɝːˈbΙͺd.Ι™.tΜ¬i/ (AmE)

Noun β€” water turbidity

Definition: Cloudiness of a fluid caused by suspended particles.

Example: β€œHigh turbidity reduces coral photosynthesis.”

Synonyms: murkiness, cloudiness.

Common mistakes: ❌ Pronouncing as β€œturbulity.”

Chronic /ˈkrΙ’n.Ιͺk/ (BrE), /ˈkrɑː.nΙͺk/ (AmE)

Adjective β€” chronic stress

Definition: Long-lasting and persistent (often negative).

Example: β€œChemicals cause chronic damage to reefs.”

Synonyms: persistent, long-term.

Common mistakes: ❌ Misusing as β€œserious” only.

Trajectory /trΙ™ΛˆdΚ’ek.tΙ™r.i/ (BrE), /trΙ™ΛˆdΚ’ek.tɔːr.i/ (AmE)

Noun β€” emissions trajectory

Definition: The path or trend followed over time.

Example: β€œReef survival depends on emission trajectories.”

Synonyms: path, course, trend.

Common mistakes: ❌ Saying β€œtrajectorys” instead of β€œtrajectories.”

Interventions /ˌΙͺn.tΙ™Λˆven.ΚƒΙ™nz/ (BrE), /ˌΙͺn.tɚˈven.ΚƒΙ™nz/ (AmE)

Noun (plural) β€” policy or medical/ecological interventions

Definition: Actions designed to improve a situation.

Example: β€œRestoration interventions include coral nurseries.”

Synonyms: measures, strategies.

Common mistakes: ❌ Using singular when plural is needed.

Genotypes /ˈdΚ’iː.nΙ™.taΙͺps/ (BrE & AmE)

Noun (plural) β€” genetic make-up

Definition: The genetic constitution of an organism.

Example: β€œRestoration may overuse certain genotypes.”

Synonyms: genetic types, DNA profiles.

Common mistakes: ❌ Writing β€œgenos.”

Ethical /ΛˆΙ›ΞΈ.Ιͺ.kΙ™l/ (BrE), /ΛˆΙ›ΞΈ.Ι™.kΙ™l/ (AmE)

Adjective β€” ethical questions

Definition: Concerning what is morally right or wrong.

Example: β€œGenetic modification raises ethical debates.”

Synonyms: moral, principled.

Common mistakes: ❌ Confusing with β€œethnical.”

Photogrammetry /ˌfΙ™ΚŠ.tΙ™ΚŠΛˆΙ‘rΓ¦m.Ιͺ.tri/ (BrE), /ˌfoʊ.tΜ¬oʊˈɑrΓ¦m.Ι™.tri/ (AmE)

Noun β€” underwater photogrammetry

Definition: The science of using photos to create precise measurements or 3D maps.

Example: β€œPhotogrammetry maps coral reefs accurately.”

Synonyms: 3D mapping, image-based surveying.

Common mistakes: ❌ Mispronouncing as β€œphotogeometry.”

Baseline /ˈbeΙͺs.laΙͺn/ (BrE & AmE)

Noun β€” ecological baseline

Definition: A starting point used for comparison.

Example: β€œDNA sampling sets a baseline for species monitoring.”

Synonyms: reference point, standard.

Common mistakes: ❌ Using only in sports contexts.

🟠 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 /ΛˆΙ›n.Ι™.dΚ’i Ι™ΛˆlaΙͺ.Ι™ns/

Noun phrase β€” a cooperative energy-sharing relationship.

Definition: A partnership where two entities provide mutual energy benefits.

Example: β€œCorals and algae form an energy alliance.” (Means: they share resources for survival.)

Synonyms: energy partnership.

Mistakes: ❌ Using only for politics; ❌ confusing with β€œpower company alliance.”

Limestone city-building /ˈlaΙͺm.stΙ™ΚŠn ˈsΙͺt.i ˌbΙͺl.dΙͺΕ‹/

Noun phrase β€” reefs as builders of massive rock-like structures.

Example: β€œReefs engage in limestone city-building.”

Synonyms: reef architecture.

Mistakes: ❌ Literal cities; ❌ thinking it refers to human construction.

Expel algae /ΙͺkˈspΙ›l ˈæl.dΚ’iː/

Verb phrase β€” to force algae out.

Definition: The process corals undergo during stress.

Example: β€œCorals expel algae when overheated.”

Synonyms: eject algae, release algae.

Mistakes: ❌ Saying β€œexplode algae.”

Outsized share /ˌaʊtˈsaΙͺzd ΚƒeΙ™/ (BrE), /ˌaʊtˈsaΙͺzd Κƒer/ (AmE)

Noun phrase β€” disproportionately large portion.

Example: β€œReefs host an outsized share of marine species.”

Synonyms: disproportionate amount.

Mistakes: ❌ Writing β€œoutside share.”

Intricate food webs /ˈΙͺn.trΙͺ.kΙ™t fuːd webz/

Noun phrase β€” complex feeding relationships.

Example: β€œReefs sustain intricate food webs.”

Synonyms: complex ecosystems.

Mistakes: ❌ Using β€œwebsites.”

Genetic exchange /dΚ’Ι™ΛˆnΙ›t.Ιͺk ΙͺksˈtΚƒeΙͺndΚ’/

Noun phrase β€” sharing of genes among populations.

Example: β€œLarvae promote genetic exchange.”

Synonyms: gene flow.

Mistakes: ❌ Thinking it is about currency.

Source reefs /sɔːs riːfs/

Noun phrase β€” reefs that provide larvae to others.

Example: β€œSource reefs repopulate damaged areas.”

Synonyms: larval donors.

Mistakes: ❌ Confusing with β€œsauce reefs.”

Phase shift to algal dominance /feΙͺz ΚƒΙͺft tuː ˈæl.Ι‘Ι™l ˈdΙ’m.Ιͺ.nΙ™ns/

Noun phrase β€” major ecosystem change.

Example: β€œOverfishing risks a phase shift to algal dominance.”

Synonyms: ecological regime shift.

Mistakes: ❌ Misheard as β€œface shift.”

Functional redundancy /ˈfΚŒΕ‹k.ΚƒΙ™n.Ι™l rΙͺˈdʌn.dΙ™n.si/

Noun phrase β€” overlap in ecological roles.

Example: β€œDiverse grazers ensure functional redundancy.”

Synonyms: role overlap.

Mistakes: ❌ Using only in job loss contexts.

Fence out threats /fΙ›ns aʊt ΞΈrΙ›ts/

Verb phrase β€” block or exclude dangers.

Example: β€œMarine parks cannot fence out pollution.”

Synonyms: keep out, block.

Mistakes: ❌ Using literally only with gardens.

Chronic stress /ˈkrΙ’n.Ιͺk strΙ›s/

Noun phrase β€” long-term harmful pressure.

Example: β€œPlastics impose chronic stress on reefs.”

Synonyms: persistent pressure.

Mistakes: ❌ Misusing as β€œserious stress.”

Rewrite the physics /ˌriːˈraΙͺt Γ°Ι™ ˈfΙͺz.Ιͺks/

Verb phrase β€” attempt the impossible in natural law.

Example: β€œLocal action cannot rewrite the physics of heat.”

Synonyms: defy nature’s laws.

Mistakes: ❌ Taking literally as changing physics books.

Emissions trajectories /ΙͺˈmΙͺΚƒ.Ι™nz trΙ™ΛˆdΚ’ek.tΙ™r.i/

Noun phrase β€” future trends in greenhouse gas output.

Example: β€œReef survival depends on emissions trajectories.”

Synonyms: emission paths.

Mistakes: ❌ Writing β€œtrajectories” as β€œtrajections.”

Seed hardier lineages /siːd ˈhɑː.di.Ι™r ˈlΙͺn.i.ΙͺdΚ’Ιͺz/

Verb phrase β€” establish tougher generations.

Example: β€œRestoration may seed hardier lineages.”

Synonyms: propagate stronger strains.

Mistakes: ❌ Confusing β€œlineage” with β€œlanguage.”

Ethical questions /ΛˆΙ›ΞΈ.Ιͺ.kΙ™l ˈkwΙ›s.tΚƒΙ™nz/

Noun phrase β€” moral issues for debate.

Example: β€œGenetic editing raises ethical questions.”

Synonyms: moral dilemmas.

Mistakes: ❌ Writing β€œethnical.”

Transform monitoring /trΓ¦nsˈfɔːm ˈmΙ’n.Ιͺ.tΙ™r.ΙͺΕ‹/

Verb phrase β€” radically change observation practices.

Example: β€œSatellites transform monitoring of reefs.”

Synonyms: revolutionise observation.

Mistakes: ❌ Misusing as β€œtransport monitoring.”

Environmental DNA /ΙͺnˌvaΙͺ.rΙ™nˈmΙ›n.tΙ™l ˌdiː.enˈeΙͺ/

Noun phrase β€” DNA traces found in the environment.

Example: β€œEnvironmental DNA reveals hidden species.”

Synonyms: eDNA sampling.

Mistakes: ❌ Thinking it means β€˜environment-friendly DNA.’

Bend ecological trends /bΙ›nd ˌiː.kΙ™ΛˆlΙ’dΚ’.Ιͺ.kΙ™l trΙ›ndz/

Verb phrase β€” change the direction of environmental patterns.

Example: β€œPolicies aim to bend ecological trends.”

Synonyms: shift trajectories, alter paths.

Mistakes: ❌ Taking β€œbend” literally as curve physically.

Stabilise appearances /ˈsteΙͺ.bΙͺ.laΙͺz Ι™ΛˆpΙͺΙ™.rΙ™nsΙͺz/

Verb phrase β€” make things look steady without solving causes.

Example: β€œSuperficial measures stabilise appearances.”

Synonyms: maintain image, mask decline.

Mistakes: ❌ Confusing with personal looks.

πŸ”Ί 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, you’ll see a detailed explanation.