Pratique du Shadowing: How is glass made? - Apprendre l'anglais à l'oral avec la vidéo
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72 phrases
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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.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B1 s’appuie sur la vidéo « How is glass made? ». Les mots qui reviennent le plus souvent : glass, sand, melt, eclipse, molten. Cette vidéo contient 72 phrases et 728 mots à répéter en shadowing. La partie parlée dure 4:28. Le locuteur parle à un rythme naturel d’environ 163 mots par minute, proche d’une conversation courante. 82 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer. 14 de ses 72 phrases sont des questions : un bon entraînement pour l’intonation interrogative et les réponses courtes.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| melt verbe | /mɛlt/ | fondre, se dissoudre |
| eclipse nom | /ɪˈklɪps/ | éclipse |
| lunar adjectif | /ˈlunɚ/ | lunaire, sélénite |
| vase nom | /veɪ̯s/ | vase |
| furnace nom | /ˈfɝnɪs/ | chaudière |
| lava nom | /ˈlɑvə/ | lave |
| pipe nom | /ˈpaɪp/ | cornemuse |
| campfire nom | /ˈkæmpˌfaɪ̯ɚ/ | feu de camp |
| eyeglass nom | /ˈaɪˌɡlæs/ | monocle |
| skyscraper nom | /ˈskaɪˌskɹeɪpɚ/ | gratte-ciel |
| windshield nom | /wɪnˈʃiːld/ | pare-brise, parebrise |
| thickness nom | /ˈθɪknəs/ | épaisseur, grosseur |
| swan nom | /swɑn/ | cygne, cygne mâle |
| glow verbe | /ɡloʊ/ | briller, luire |
| sculpture nom | /ˈskʌlpt͡ʃɚ/ | sculpture |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| come across verbe | avoir l'air de |
| end up verbe | se terminer, se finir |
Des phrases à répéter
Des phrases courtes et complètes de la vidéo, à réutiliser dans la conversation de tous les jours :
- 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.
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | was taken · are made · is carved |
| Superlatifs the -est / the most … — le plus haut ou le plus bas d’un groupe | the most amazing · the earliest |
| Présent continu am/is/are + -ing — ce qui se passe en ce moment | you're sitting · I'm guessing · is making |
| Futur avec « will » will + verbe — une décision, une promesse ou une prédiction | will melt · will start · you'll get |
Prononciation à surveiller
Le locuteur utilise 10 contractions et formes réduites, comme I'm, isn't, wanna. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: thickness /ˈθɪknəs/, beneath /bɪˈniːθ/
Les sons difficiles pour les francophones :
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: sculpture /ˈskʌlpt͡ʃɚ/, statue /ˈstæt͡ʃu/
- /r/ anglais — langue recourbée, sans frotter la gorge: skyscraper /ˈskaɪˌskɹeɪpɚ/, smartphone /ˈsmɑɹtfoʊn/, pour /poɹ/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme melt, eclipse, lunar.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.