Exam Strategy & Vocabulary – Page 1

Exam-Style Matching Questions: Strategy & Mindset

• Matching questions pair numbered prompts with lettered options.
• Important nuance: the numbered side usually appears in the same order as the information in the recording/reading, while the lettered answers do not.
• Action plan before listening/reading:
- Skim every numbered item → predict keywords you will hear.
- Read all lettered options → note synonyms, paraphrases, or grammatical transformations that might surface in the material.
- During the recording keep a running tally; because numbered items are sequential you can tick them off chronologically.
• Time management tip: If two options look almost identical, mark both lightly and return after the passage—don’t stall.
• Skill transfer: The strategy mirrors IELTS Listening Part 2 & Part 3 matching tasks, where recognizing paraphrase is key.

Phrasal-Verb Cluster: “LOOK + Preposition/Particle”

• look through (sth)
• Function: scan/skim something quickly to locate specific information.
• Typical context: newspapers, research articles, lists, data tables.
• Example (orig.): “Our teacher required us to look through the newspapers for information.”
• Exam hint: a synonym in recordings may be “scan,” “skim,” “flip through.”

• look over (sth)
• Function: review or check for errors/quality; more careful than “look through.”
• Example (orig.): “Before the meeting, I looked over the documents.”
• Collocations: \text{look over + report/essay/contract}.
• Note difference: “look over” ≠ “overlook” (to miss).

• look at (sth)
• Function: physically direct eyes at; examine briefly; also metaphorical “consider.”
• Example (orig.): “When my mom arrived at the hospital, the doctor looked at her broken legs.”
• IELTS tip: in graph descriptions, “Let’s now look at the figures for 2020.”

Inter-relation:
\text{look through} < \text{look over} < \text{analyse} (increasing depth of scrutiny).

Verbs of Protection: Guard vs Defend

• guard (sb/sth)
• Part of speech: verb (& noun).
• Meaning: watch over to prevent escape, harm, or theft.
• Example (orig.): “The soldiers guarded their prisoners.”
• Extra collocations: guard a bank, guard duty, security guard.

• defend (sb/sth)
• Meaning: actively protect by resisting attack or criticism.
• Example (orig.): “The soldiers defended the castle.”
• Grammar: can take \text{defend + against} — “defend the castle against invaders.”
• Distinction: guard is continuous monitoring; defend implies confrontation or argument.

Ethical dimension: In international law, “defending” a civilian area may require proportionality; “guarding” prisoners invokes Geneva Convention rights.

Reading Vocabulary: Aerosol & Propellant

• aerosol (\text{Noun})
• IPA: /ˈerəsɔːl/.
• Core idea: a suspension of fine solid particles or liquid droplets in a gas.
• Everyday item: “aerosol can” → pressurised container releasing spray.
• Example (orig.): “She sprayed the perfume from an aerosol can.”
• Scientific note: natural aerosols include sea-salt and volcanic ash; anthropogenic aerosols affect climate forcing.

• Key compounds & phrases:
• aerosol can – physical container.
• aerosol spray – the emitted mist.
• aerosol particles – micro-size solids/liquids (significance: inhalation health concerns, atmospheric optics).

• propellant (\text{Noun})
• IPA: /prəˈpelənt/.
• Definition: substance that produces thrust—pushes out contents or powers rockets.
• Mechanism in cans: internal propellant (often compressed gas) creates pressure P; when valve opens, pressure differential \Delta P expels liquid as fine aerosol.

• Sub-types & Engineering Context
• gas propellant – e.g.
- \text{CO}_2 cartridges in seltzer bottles.
• liquid propellant – bipropellants in rocketry (fuel + oxidizer).
• rocket propellant – can be solid, liquid, or hybrid; key to \text{Δv} budget (Tsiolkovsky equation).

Practical/real-world link: Regulation on chlorofluorocarbon (CFC) aerosol propellants followed the 1987 Montreal Protocol due to ozone-layer depletion.

Wrap-Up / Interconnections

• Exam skill ties: knowing nuanced verbs (look through/over/at, guard/defend) enhances listening paraphrase recognition—commonly exploited in IELTS & TOEFL distractors.
• Science lexis (aerosol, propellant) can surface in Reading passages on environment or technology; familiarity reduces cognitive load when processing dense scientific text.
• Ethical layer: Aerosols → climate debate; Guard/defend → humanitarian law; connecting vocabulary to broader issues supports task 2 essays.