Shadowing Practice: Listening Test 3. Part 4: Microplastics - Learn English Speaking with Video
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Part 4.
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You will hear part of an environmental science lecture about microplastics.
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First, you have some time to look at questions 31 to 40.
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Now listen carefully and answer questions 31 to 40.
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In today's lecture, I'm going to be talking about microplastics.
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Microplastics are tiny pieces of plastic smaller than 5 mm in size.
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Recently, there's been a greater awareness that there are large quantities of plastic waste, big and small, in the environment.
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The amount of plastic waste in the oceans has received widespread attention,
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but far less is known about the effects of microplastics in freshwater and particularly in soil oil.
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Microplastics can enter the environment via a number of different sources.
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Threads and microfibres detach from synthetic clothing every time they're put in a washing machine,
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and these find their way into the water system.
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Other sources include big pieces of plastic waste that are already in the environment,
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and these break down into microscopic particles over a period of time.
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On a larger scale, factory waste is another route, as our tyres, which wear down as cars,
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lorries and so on, travel along road surfaces.
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We already understand some of the impacts of microplastics from studies involving fish and other animals.
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There is evidence that microplastics harm small creatures in a variety of ways, such as by damaging their mouths,
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or by impairing their ability to feed, for example when microplastics get lodged in their digestive system.
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Surprisingly, perhaps, it is likely that humans consume microplastics, as these have been detected in a wide range of food and drink products,
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including bottled water, as well as in water that comes direct from the tap.
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What's more, salt and many kinds of seafood have also been found to contain microplastics.
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However, it's important to underline that there is not yet conclusive proof that microplastics cause significant harm to people.
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In many countries, including here in the UK, there is legislation which prevents manufacturers from adding plastic microbeads to shower gels,
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facial cleansers and toothpaste.
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It is very difficult to accurately estimate the total amount of
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microplastic particles in the soil as they can be hard to detect
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but we do know they are carried in the air and deposited in the soil by rain.
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What's more many of the fertilizers used by both farmers and gardeners contain microplastics.
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A team from the Anglia Ruskin University in Cambridge has carried
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out a study of the effects of microplastics on the digestive tracts of earthworms.
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These worms, which live in topsoil, are an essential component of our agricultural system.
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By feeding on soil, they mix nutrients into it, thereby making it more fertile.
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The researchers set out to discover whether the introduction of microplastics into the soil
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and the subsequent ingestion of these by earthworms would impact soil quality and ultimately inhibit plant growth.
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The short answer was yes, it did.
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After placing three different types of microplastic particles into the soil, they planted perennial ryegrass.
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The particles of microplastic, which included biodegradable PLA and conventional high-density polyethylene,
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or HTPE, were then ingested by the earthworms in the soil.
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The result was that the worms lost weight rapidly.
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What's more, a lower percentage than normal of the ryegrass seeds germinated, and the researchers concluded
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that this was a direct result of the earthworms being unable to fulfil their normal role in making soil more fertile.
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The team also discovered that there was an increase in the amount of acid found in the soil,
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and this was attributed mainly to the microplastic particles from conventional HDPE plastic.
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The conclusions of the study make for very interesting reading.
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I've included the reference in the notes to give you at the end of this session.
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To summarise, the authors proposed the idea that we need to regard soil as we would regard any other process in nature.
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This means we should accept the implications of soil being dependent on decaying
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and dead matter constantly being passed through the bodies of earthworms.
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That is, when soil becomes impoverished by the presence of microplastics,
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not only ecosystems but also the whole of society are negatively impacted.
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That is the end of part four.
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Thank you.
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Boost Your Listening & Speaking with Microplastics Lecture Practice
This video is perfect for English learners aiming to sharpen their shadow speak skills—immediately repeating what you hear to mimic rhythm and pronunciation. By focusing on a scientific lecture, you’ll tackle complex vocabulary and natural academic flow, a key fluency milestone for conversing confidently in professional or educational settings.
Phrase Bank: Reusable Expressions for Clear Communication
- "detach from" – useful for describing objects separating (e.g., "Threads detach from my sweater in the wash.")
- "break down into" – ideal for explaining processes (e.g., "Plastic breaks down into tiny particles over time.")
- "conclusive proof" – essential for discussing evidence (e.g., "There’s no conclusive proof of the effect yet.")
- "make for very interesting reading" – a natural way to praise content (e.g., "Her research makes for very interesting reading.")
Fix Your Weak Spots: Pronunciation & Rhythm Tips
The lecture’s steady pace and technical terms (like "biodegradable PLA" or "high-density polyethylene") challenge you to master clear pronunciation of multi-syllabic words. Practice shadowing by pausing the video and repeating phrases—focus on stressing the right syllables (e.g., "mi-CRO-plas-tics" not "MI-cro-PLAS-tics"). Use a shadowing app or shadowing site to record yourself and compare to the speaker’s rhythm. Notice how the lecturer connects words ("as well as in water" vs. "as well as in water")—this will make your speech sound more natural. Small daily practice with this clip will help you tackle complex topics with ease!
דקדוק בסרטון הזה
המבנים שהדובר משתמש בהם הכי הרבה, עם המילים המדויקות מהסרטון:
| מבנה | בסרטון |
|---|---|
| סביל (Passive voice) be + past participle — הדגש הוא על מה שקורה, לא על מי שעושה את הפעולה | is known · have been detected · been found |
| הווה מושלם (Present perfect) have/has + past participle — פעולה שקרתה בעבר ועדיין יש לה חשיבות או השפעה עכשיו | there's been · has received · have been detected |
מהי טכניקת השאדואינג?
שאדואינג היא טכניקת למידת שפה מבוססת מדע שפותחה במקור להכשרת מתורגמנים מקצועיים ופופולרית על ידי הפוליגלוט ד"ר אלכסנדר ארגואלס. השיטה פשוטה אך עוצמתית: אתה מקשיב לאודיו באנגלית ילידית וחוזר עליו בקול רם מיד — כמו צל העוקב אחרי הדובר עם עיכוב של 1–2 שניות בלבד. בניגוד להאזנה פסיבית או תרגילי דקדוק, שאדואינג מכריח את המוח והשרירים בפה לעבד ולשחזר דפוסי דיבור אמיתיים בו זמנית. מחקרים מראים שזה משפר משמעותית את דיוק ההגייה, האינטונציה, הקצב, הדיבור המחובר, הבנת השמיעה ושטף הדיבור — מה שהופך אותו לאחת השיטות היעילות ביותר להכנה לIELTS Speaking ולתקשורת באנגלית בעולם האמיתי.