True / False / Not Given (Ch 02) · Yes / No / Not Given (Ch 03)
MatchingQuiz
Matching Headings (Ch 04) · Matching Information (Ch 05) · Matching Features (Ch 06) · Matching Sentence Endings (Ch 07)
CompletionQuiz
Sentence (Ch 08) · Summary with word bank (Ch 09) · Summary no bank (Ch 10) · Note (Ch 11) · Table (Ch 12) · Flow-chart (Ch 13) · Diagram label (Ch 14) · Short Answer (Ch 15)
Shared Practice Passage
All question-type demos below use this passage. Read it once before working through the examples.
Life at Hydrothermal Vents~330 words
A
The deep ocean floor, once thought to be a barren wasteland, has proved to be one of the most biologically diverse environments on Earth. Hydrothermal vents — fissures in the seabed that release superheated, mineral-rich water — support thriving ecosystems that derive their energy not from sunlight but from chemosynthesis: the conversion of inorganic compounds by bacteria into organic matter.
B
Scientists first discovered hydrothermal vent communities in 1977 during a dive by the submersible Alvin near the Galápagos Rift in the Pacific Ocean. The discovery overturned a fundamental assumption in biology — that all life ultimately depends on photosynthesis. Vent communities obtain their energy from hydrogen sulphide and methane seeping from the seafloor, processed by chemosynthetic microbes that form the base of the food chain.
C
The animals found at hydrothermal vents are often strikingly different from their shallow-water relatives. Giant tube worms, some exceeding two metres in length, have no digestive system; instead, they harbour billions of chemosynthetic bacteria inside a specialised organ called the trophosome. Vent crabs and shrimp have evolved sensory systems adapted to near-total darkness, and some species appear to lack the pigmentation common in surface-dwelling creatures.
D
Despite the extreme conditions — temperatures near vents can exceed 400°C, and pressure at 2,500 metres depth is roughly 250 times that at sea level — vent ecosystems are remarkably productive. Biomass densities can be 500 to 1,000 times higher than in the surrounding deep-sea floor. However, individual vent sites are short-lived on geological timescales: most become inactive within decades as subsurface magma cools, forcing resident species to colonise new vents.
E
The discovery of vent life has significant implications for astrobiology — the study of potential life beyond Earth. Moons such as Europa and Enceladus are believed to harbour liquid water oceans beneath their icy crusts, potentially overlying geologically active seafloors. Scientists now consider hydrothermal vent ecosystems a compelling analogue for the kind of life that might exist on these distant worlds, independent of any solar energy source.
1 · KnowledgeCard
Props: title: string, body: string
Paraphrase is the core skill
The correct answer is almost never a word-for-word copy of the passage. Train yourself to recognise synonym substitution and grammatical restructuring — this is the highest-leverage skill across all IELTS Reading question types.
Order is mostly preserved
For a single passage, questions generally follow the order of the passage. Once you have answered question 3, start scanning from that location for question 4 — not from the beginning.
Read the question stem (ignore the options). Identify the one keyword that is unlikely to appear elsewhere: a proper noun, a number, or a specific technical term. This is your scanning target.
2
Scan the passage to locate the answer window
Move your eyes quickly down the passage looking only for your keyword or its synonym. Stop when you find it. The answer is within 2–4 sentences of this point.
3
Read the window carefully, then match
Read those sentences slowly. Form your own answer before reading the options — this prevents distractors from contaminating your judgment.
Example with a two-paragraph excerpt (full passage shown in the Shared Practice Passage section above):
Life at Hydrothermal Vents — Excerpt~120 words
A
The deep ocean floor, once thought to be a barren wasteland, has proved to be one of the most biologically diverse environments on Earth. Hydrothermal vents — fissures in the seabed that release superheated, mineral-rich water — support thriving ecosystems that derive their energy not from sunlight but from chemosynthesis: the conversion of inorganic compounds by bacteria into organic matter.
B
Scientists first discovered hydrothermal vent communities in 1977 during a dive by the submersible Alvin near the Galápagos Rift in the Pacific Ocean. The discovery overturned a fundamental assumption in biology — that all life ultimately depends on photosynthesis. Vent communities obtain their energy from hydrogen sulphide and methane seeping from the seafloor, processed by chemosynthetic microbes that form the base of the food chain.
Covers Ch 08–15. Set wordLimit at the quiz level for a shared limit, or per-item for mixed formats. Answers are case-insensitive; use alternates for British/American spelling variants.
7a — Sentence Completion (Ch 08 style)
Questions 19–21. Complete the sentences below. Choose NO MORE THAN TWO WORDS from the passage for each answer.
NO MORE THAN TWO WORDS
1.Vent communities obtain energy from ______ and methane that seep from the seafloor.
Answer:
2.Giant tube worms have no ______ system and instead rely on internal bacteria for nutrition.
Answer:
3.Most vent sites become inactive within ______ as the underlying magma cools.
Answer:
7b — Summary Completion with word bank (Ch 09 style)
Provide the word bank as a CalloutBox or inline text above the quiz; the quiz itself handles the blank inputs.
Word bank: submersible · photosynthesis · chemosynthesis · magma · bacteria
Questions 22–23. Complete the summary using words from the word bank above.
ONE WORD ONLY
4.Hydrothermal vents were first discovered in 1977 by the ______ Alvin near the Galápagos Rift.
Answer:
5.The find changed biology by showing that life does not have to depend on ______.
Answer:
7c — Short Answer Questions (Ch 15 style)
Use alternates when two different passage words are equally valid (e.g., two country names).
Questions 24–25. Answer the questions below. Choose NO MORE THAN THREE WORDS from the passage for each answer.
NO MORE THAN THREE WORDS
6.What name is given to the process by which bacteria convert inorganic compounds into organic matter at vent sites?
Answer:
7.Name ONE moon mentioned in the passage that scientists believe may have a liquid water ocean.