Shadowing Practice: How is glass made? - Learn English Speaking with Video
Les maken...
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Hi, it's Doug.
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I recently came across this unbelievable video.
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It was taken at a hotel in Texas where on the roof of the hotel they have this pool
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that hangs off the edge and it has a glass bottom.
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Look at this.
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Would you go in there?
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Would you trust this glass?
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Someone named Benjamin has a question about glass.
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Let's give him a call now.
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Hi, Doug.
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Hi, Benjamin.
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I have a question for you.
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How is glass made?
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That's a great question.
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It's funny, right?
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Think about just how many objects around you are made of glass.
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Without glass, we'd have no windows, no windshields for our cars, no No drinking glasses or eyeglasses.
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No skyscrapers or smartphones.
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And yet, it's really not obvious at all where glass comes from.
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Like if you're sitting there and you have a table or a desk in front of you like this, that's wood.
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I'm guessing you know that wood comes from a tree.
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Or this statue here is carved from stone.
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You know where that comes from. But glass?
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Glass is a material that has to be made.
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How do they make it?
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Where does it come from?
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Before I say anything more, now would be a good time to pause the video and discuss.
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Okay, you ready?
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Well, believe it or not, Glass is made by taking a bunch of sand and getting it so hot that it melts.
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It's one of the most amazing things to watch how it's made because in order to melt sand, you have to use a special type of oven that can get super hot.
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It's called a furnace or a kiln.
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Here you can see someone loading some sand into the furnace.
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Once it gets hot enough, it will melt or become liquid.
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And when you get something this hot, you can see it glows, just like lava.
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This isn't lava though, it's molten sand.
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And as it cools, it will start to look more familiar to you.
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It becomes solid glass.
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To make a flat sheet of glass, like you'd use for a window, they melt sand until it's molten.
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Then they pour it out and roll it into a flat shape like this, and carefully allow it to cool.
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More fancy objects, like a glass vase, are even more fun to watch.
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This involves a special skill called glass blowing.
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You can see here, it starts with this person taking a big glob of molten sand
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and getting it on the end of a hollow pipe.
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Then she blows air into the pipe.
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You can actually blow a bubble into it, which might end up being the open part of the vase.
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The molten glass has a similar thickness as honey.
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They carefully shape it the way they want it and keep turning it and turning it.
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As it cools, it becomes solid.
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Artists can make amazing sculptures with glass.
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Believe it or not, this artist is making a glass swan.
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So that's how glass is made.
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But it's kind of weird, isn't it?
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I mean, how did people ever discover that if you melt sand, it makes glass?
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We've been making glass for a long time.
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So long ago now that no one knows for sure who was the first person to discover
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that if you melt sand it makes glass.
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But some of the earliest objects made of glass come from ancient Egypt, a place covered in desert sand.
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Could it be that someone long ago had a campfire
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and noticed that the heat of their fire melted the sand beneath it?
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No one knows for sure, but it's possible.
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That's all for this week's question.
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Thanks Benjamin for asking it.
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Now for the next episode, there's a lunar eclipse that's going to happen.
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I reached into my question jar and chose three questions about lunar eclipses that I'm thinking about answering.
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When this video is done playing, you'll get to vote on one.
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You can choose from, what's the difference between a solar and lunar eclipse?
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Why does the moon turn blood red during a lunar eclipse?
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Or where does the word eclipse come from?
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So submit your vote when the video's over.
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I wanna hear from all of you watching.
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There are mysteries all around us.
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Stay curious and see you next week.
📺 Zelfde Kanaal
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Woordenschat en spreektips bij deze les
Deze spreekles op niveau B1 is gebaseerd op de video “How is glass made?”. Deze woorden komen het vaakst terug: glass, sand, melt, eclipse, molten. Deze video bevat 72 zinnen en 728 woorden om na te spreken. Het gesproken deel duurt 4:28. De spreker praat in een natuurlijk tempo van ongeveer 163 woorden per minuut, dicht bij een alledaags gesprek. 82% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden; de rest kun je beter vooraf bekijken. 14 van de 72 zinnen zijn vragen, dus het is goede oefening voor vraagintonatie en korte antwoorden.
Belangrijke woorden in deze video
De 15 moeilijkste woorden uit de video, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| melt werkwoord | /mɛlt/ | smelten, laten smelten |
| eclipse zelfstandig naamwoord | /ɪˈklɪps/ | verduistering, eclips |
| lunar bijvoeglijk naamwoord | /ˈlunɚ/ | lunair |
| vase zelfstandig naamwoord | /veɪ̯s/ | vaas |
| furnace zelfstandig naamwoord | /ˈfɝnɪs/ | ketel |
| lava zelfstandig naamwoord | /ˈlɑvə/ | lava |
| pipe zelfstandig naamwoord | /ˈpaɪp/ | fluit |
| campfire zelfstandig naamwoord | /ˈkæmpˌfaɪ̯ɚ/ | kampvuur |
| skyscraper zelfstandig naamwoord | /ˈskaɪˌskɹeɪpɚ/ | wolkenkrabber |
| windshield zelfstandig naamwoord | /wɪnˈʃiːld/ | voorruit |
| thickness zelfstandig naamwoord | /ˈθɪknəs/ | dikte |
| swan zelfstandig naamwoord | /swɑn/ | zwaan |
| sculpture zelfstandig naamwoord | /ˈskʌlpt͡ʃɚ/ | beeldhouwwerk, beeld |
| hollow bijvoeglijk naamwoord | /ˈhɑloʊ/ | hol |
| pause zelfstandig naamwoord | /pɔːz/ | pauze |
Phrasal verbs die je zult horen
| Woord | Betekenis |
|---|---|
| come across werkwoord | overkomen |
| end up werkwoord | belanden, terechtkomen |
Zinnen om te herhalen
Korte, volledige zinnen uit de video die je in alledaagse gesprekken kunt gebruiken:
- Would you go in there?
- Would you trust this glass?
- Let's give him a call now.
- We've been making glass for a long time.
Grammatica in deze video
De structuren die de spreker het meest gebruikt, met de exacte woorden uit de video:
| Structuur | In de video |
|---|---|
| Lijdende vorm be + voltooid deelwoord — het gaat om wat er gebeurt, niet om wie het doet | was taken · are made · is carved |
| Overtreffende trap the -est / the most … — het hoogste of laagste van een groep | the most amazing · the earliest |
| Present continuous am/is/are + -ing — iets dat nu of in deze periode gebeurt | you're sitting · I'm guessing · is making |
| Toekomst met “will” will + werkwoord — een besluit, belofte of voorspelling | will melt · will start · you'll get |
Uitspraak om op te letten
De spreker gebruikt 10 samentrekkingen en verkorte vormen, zoals I'm, isn't, wanna. Spreek ze kort uit, zoals je ze hoort.
- De “th”-klanken: thickness /ˈθɪknəs/, beneath /bɪˈniːθ/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: windshield /wɪnˈʃiːld/, pause /pɔːz/, involve /ɪnˈvɑlv/
- /æ/ — opener dan de Nederlandse “e”: campfire /ˈkæmpˌfaɪ̯ɚ/, eyeglass /ˈaɪˌɡlæs/, statue /ˈstæt͡ʃu/
- /g/ — een harde plofklank, geen Nederlandse “g”: eyeglass /ˈaɪˌɡlæs/, glow /ɡloʊ/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Begin op 0,75× snelheid, spreek zin voor zin na en ga terug naar normale snelheid zodra het makkelijk gaat.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als melt, eclipse, lunar.
Wat is de Shadowing-techniek?
Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.