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🎧 Pratique IELTS écoute et expression
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📝 Transcription dialogue IELTS Speaking
I want to describe a simple way we measure microplastic pollution in rivers and on beaches. A single spoonful of river sediment can contain thousands of tiny plastic particles. That small sample, a spoonful, is enough to alarm scientists. We often take a spoonful from the top layer and then sieve and inspect it under a microscope. In urban estuaries we found far higher concentrations than in remote mountain streams. Surprisingly, some protected bays showed lower counts than samples taken near busy storm drains. Samples are dried and weighed. We use sieves, microscopes and chemical tests to separate fibres and fragments. These fragments are durable and persist in the environment. The contamination is pervasive, meaning it appears almost everywhere we look. Microplastics accumulate in sediments and in soil after heavy rainfall and sewage overflows. That accumulation can harm invertebrates and birds, and may enter the food chain through crops irrigated with contaminated water. To help, communities should reduce single-use plastics and improve waste collection. The point is simple. Even a tiny amount in a spoonful of sand or mud reveals larger problems for ecosystems and human health.
📝 📚 Questions de pratique IELTS
1
According to the speaker, what can a single spoonful of river sediment contain?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: The speaker states that a single spoonful of river sediment can contain thousands of tiny plastic particles. Option B is wrong because the passage mentions plastic particles, not only organic matter. Option C is wrong because detectable contaminants are explicitly reported. Option D is wrong because large metal objects are not described as typical contents of a spoonful in this context.
2
Which locations did the speaker say had higher concentrations of microplastics?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: The speaker reports finding far higher concentrations in urban estuaries. Option B is incorrect because mountain streams had lower levels. Option C is incorrect because protected bays were said to show lower counts than near storm drains. Option D is incorrect because the passage does not discuss open ocean surfaces; it focuses on sediments in rivers, estuaries and bays.
3
What methods did the speaker mention using to analyze samples?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: The speaker lists sieves, microscopes and chemical tests. Option B is wrong because X-ray imaging and sonar were not mentioned. Option C is wrong because satellite monitoring is not discussed for sediment samples. Option D is wrong because the speaker specifies sieves and microscopes rather than only visual inspection.
4
What does the speaker imply is a reason small samples are useful?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: The speaker implies that a small sample like a spoonful can reveal larger problems and wider contamination trends. Option B is wrong because the speaker describes additional analysis steps after sampling. Option C is wrong because the passage emphasizes contamination, not cleanliness. Option D is wrong because the focus is on plastic particles, not metal pollution.
5
What does the word 'pervasive' most nearly mean as used in the passage?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: 'Pervasive' here is explained as appearing almost everywhere, so 'widespread' is correct. Option B is wrong because 'pervasive' does not mean temporary. Option C is wrong because 'pervasive' does not imply harmlessness. Option D is wrong because 'pervasive' means spread across many areas, not concentrated in one spot.
6
Which of the following is NOT presented as a consequence of microplastic accumulation?
Réponse incorrecte
Réponse correcte:
C
Explication:
Correct: The speaker does not claim that microplastic accumulation causes sewage overflows to disappear. Option A is mentioned as a harm. Option B is mentioned as a possible route into the food chain. Option D is mentioned by describing fragments as durable and persistent.
7
Why does the speaker recommend reducing single-use plastics?
Réponse incorrecte
Réponse correcte:
A
Explication:
Correct: The speaker recommends reducing single-use plastics to help lower microplastic pollution entering the environment. Option B is incorrect because single-use plastics do not dissolve immediately; the passage describes fragments as durable. Option C is incorrect and illogical; reducing plastics would not increase sample numbers. Option D is incorrect because the passage states sieves are used to separate fibres and fragments.
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