Pratique du Shadowing: Danger! Falling Objects: Crash Course Kids #32.1 - Apprendre l'anglais à l'oral avec la vidéo

Création de la leçon...
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I don't care who you are, if you live anywhere near this planet, then you're no stranger to gravity -- the force that affects every object on Earth and beyond.
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Because of gravity, whether you're an astronaut on the International Space Station or an ordinary, clumsy, earthbound human who happens to drop her books a lot, all things caught in our planet's gravity will, in some way, have the potential to fall to Earth.
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But objects fall differently, right?
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Like when I knock a piece of paper off my desk, it takes a lot longer to fall to the ground than if I knock a book of my desk.
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So what's up with that?
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Why do things seem to fall at different speeds on Earth?
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Well, we already know that all objects have mass.
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They have a certain amount of matter in them and when gravity pulls on an object, it gives the object weight.
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Now a long time ago, people used to think that heavier things fell faster than lighter things because that's what our senses told us.
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Now, it certainly looks like the book falls faster than the piece of paper.
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And why would we expect anything else?
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That would be like dropping a hammer and a feather and expecting them to hit the ground at the same time.
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Except, the thing I just said about the hammer and the feather?
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Someone did actually try that and they did both hit the ground at the same time.
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It just didn't happen on Earth.
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True story: when astronaut Dave Scott was on the moon in 1971, he did an experiment where he dropped a falcon feather and a hammer from the same height and they hit the ground at the same time.
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Now, how can that be?
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If you drop a hammer and a feather on Earth, the feather would take a lot longer to reach the ground.
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So, what does the Earth have that the Moon doesn't?
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For one thing, an atmosphere.
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The gases that make up Earth's atmosphere push against objects as they fall and the push of the air against a falling object causes friction.
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We call that friction "air resistance." So on Earth, the feather's flat, fluffy shape makes it run into more air resistance than the hammer does.
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This makes it fall more slowly than the hammer, but since the Moon has almost no atmosphere, there is almost no air resistance, so the two objects fell at the same rate.
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So it seems to me it's the resistance of air pushing against objects that really affects how fast objects fall.
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And that means it's experiment time.
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But you don't have to go to the Moon to do this, so don't pack your bags or anything.
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All you need are two pieces of paper that are the same size.
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Crumple one of the pieces into a tight ball and leave the other one smooth and flat.
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Now, drop each piece of paper from the same height, let's say a meter, and then write down in a table how long it takes each piece to reach the ground.
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We'll see it takes the flat paper longer than the crumpled paper to hit the floor.
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This is evidence that an object's shape affects how fast it seems to fall to Earth because the two pieces of paper are exactly the same.
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They have the same mass.
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But air resistance makes the flat paper seem to fall more slowly than the crumpled paper.
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So, based on the result of our experiment, we can say, at least here on Earth, objects appear to fall at different rates, not because they have different masses or weights but because of air resistance: the force that the Earth's atmosphere has on objects as they fall.
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And, hey, if you don't believe me, tell you what.
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Next time you go to the Moon, take a feather and a hammer with you and try it for yourself.
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Vocabulaire et conseils d’expression pour cette leçon

Cette leçon d’expression orale de niveau A2 s’appuie sur la vidéo « Danger! Falling Objects: Crash Course Kids .1 ». Les mots qui reviennent le plus souvent : object, fall, Earth, paper, hammer. Cette vidéo contient 36 phrases et 661 mots à répéter en shadowing. La partie parlée dure 3:21. Le locuteur parle vite, environ 197 mots par minute : attendez-vous à des liaisons et à des sons réduits. 87 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc facile à suivre. 7 de ses 36 phrases sont des questions : un bon entraînement pour l’intonation interrogative et les réponses courtes.

Vocabulaire clé de cette vidéo

15 mots de la vidéo à retenir, avec leur prononciation et leur sens :

MotPrononciationSens
hammer nom/ˈhæmɚ/marteau
feather nom/ˈfɛðə/plume
atmosphere nom/ˈætməsˌfɪɹ/atmosphère
gravity nom/ˈɡɹævɪti/gravité
experiment nom/ɪkˈspɛɹ.ə.mənt/expérience
desk nom/dɛsk/bureau, pupitre
knock verbe/nɑk/frapper
friction nom/ˈfɹɪkʃən/frottement, friction
astronaut nom/ˈæstɹəˌnɔt/astronaute
ordinary adjectif/ˈɔɹdɪnɛɹi/ordinaire
smooth adjectif/smuːð/doux, facile
differently adverbe/ˈdɪf.ə.ɹənt.li/différemment
metre nom/ˈmiːtəɹ/mètre
falcon nom/ˈfælkən/faucon
crumple verbe/ˈkɹʌmpəl/chiffonner, froisser

Les verbes à particule que vous entendrez

MotPrononciationSens
make up verbe/ˌmeɪk ˈʌp/constituer, composer

Prononciation à surveiller

Le locuteur utilise 9 contractions et formes réduites, comme don't, you're, didn't. Prononcez-les sous leur forme courte, telles que vous les entendez.

  • Les sons « th »: feather /ˈfɛðə/, smooth /smuːð/, earthbound /ˈɝθbaʊnd/
  • Mots longs — placez bien l’accent: experiment /ɪkˈspɛɹ.ə.mənt/, ordinary /ˈɔɹdɪnɛɹi/, differently /ˈdɪf.ə.ɹənt.li/

Les sons difficiles pour les francophones :

  • /r/ anglais — langue recourbée, sans frotter la gorge: atmosphere /ˈætməsˌfɪɹ/, gravity /ˈɡɹævɪti/, experiment /ɪkˈspɛɹ.ə.mənt/, friction /ˈfɹɪkʃən/, astronaut /ˈæstɹəˌnɔt/

Comment s’entraîner avec cette vidéo

  1. Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
  2. Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
  3. Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme hammer, feather, atmosphere.

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.

Technique du shadowing : lire le guide complet étape par étape →