Pratique du Shadowing: Introduction to high school physics | Khan Academy - Apprendre l'anglais à l'oral avec la vidéo

Création de la leçon...
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Why do you fall backwards when a bus suddenly accelerates?
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What powers those launched roller coasters?
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And speaking of power, how do power stations generate electricity without using any batteries?
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We know an apple falls because the earth pulls on it, but does the apple pull on the earth as well?
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Why do astronauts in space station appear to float even though gravity still exists there?
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And why do the hottest stars in the night sky often shine blue?
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In this high school physics course, we will answer all these questions and many more.
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Physics is the science of building models to explain how the universe works.
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We take observations, describe them with math, and use those models to predict and understand the world around us.
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So what will we explore in this course?
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Well, we'll start by learning to describe motions, how to track positions, velocities, and accelerations.
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Then we'll ask, but what causes motion?
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That will lead us to the idea of forces and Newton's laws.
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We will then explore momentum and impulse tools that help engineers design things like safety cushions and crumple zones.
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Next, we dive into gravity.
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We will see how a single model can explain why apples fall on earth, why planets orbit the sun, and why astronauts seem to float inside space stations.
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Then comes electricity.
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Starting with static charges and leading up to how electricity and magnetism are connected.
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We'll discover how motors spin
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and how motion can generate energy electric current we will also explore energy how it's transformed how it's conserved
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and how it lets us model everything from roller coasters to atoms We will also dive into electromagnetic waves.
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We will learn how light behaves like a wave, helping us model how it bends, reflects and spreads.
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And how it behaves like a particle, letting us harness sunlight to generate electricity.
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But this course isn't just about watching videos.
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You will also check your understanding at every step, clear up misconceptions and apply your knowledge to real problems, building mastery as you go.
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Welcome to high school physics.
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Let's model the universe together.
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I'll see you inside.
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Vocabulaire et conseils d’expression pour cette leçon

Cette leçon d’expression orale de niveau C1 s’appuie sur la vidéo « Introduction to high school physics ». Les mots qui reviennent le plus souvent : model, electricity, generate, explore, physics. Cette vidéo contient 28 phrases et 358 mots à répéter en shadowing. La partie parlée dure 2:19. Le locuteur parle à un rythme naturel d’environ 154 mots par minute, proche d’une conversation courante. Seuls 79 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant. 8 de ses 28 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 :

MotPrononciationSens
astronaut nom/ˈæstɹəˌnɔt/astronaute
float verbe/fləʊt/flotter
behave verbe/bɪˈheɪv/se comporter
conserve verbe/kənˈsɜː(ɹ)v/conserver
crumple verbe/ˈkɹʌmpəl/chiffonner, froisser
magnetism nom/ˈmæɡ.nəˌtɪz.əm/magnétisme
misconception nom/ˌmɪs.kənˈsɛp.ʃən/idée erronée
mastery nom/ˈmæs.tɚ.i/maîtrise
electromagnetic adjectif/ɪˌlɛk.tɹoʊ.mæɡˈnɛ.tɪk/électromagnétique
cushion nom/ˈkʊʃən/coussin
accelerate verbe/ɪkˈsɛl.əˌɹeɪt/accélérer
harness verbe/ˈhɑɹ.nəs/harnacher
backward adjectif/ˈbækwɚd/en arrière
impulse nom/ˈɪmpʌls/impulsion
atom nom/ˈætəm/atome

Des phrases à répéter

Des phrases courtes et complètes de la vidéo, à réutiliser dans la conversation de tous les jours :

  • Why do you fall backwards when a bus suddenly accelerates?
  • Then we'll ask, but what causes motion?
  • Let's model the universe together.

Prononciation à surveiller

Le locuteur utilise 5 contractions et formes réduites, comme we'll, I'll, isn't. Prononcez-les sous leur forme courte, telles que vous les entendez.

  • Les sons « sh » et « zh »: misconception /ˌmɪs.kənˈsɛp.ʃən/, cushion /ˈkʊʃən/, acceleration /əkˌsɛl.əˈɹeɪ.ʃən/
  • Mots longs — placez bien l’accent: magnetism /ˈmæɡ.nəˌtɪz.əm/, misconception /ˌmɪs.kənˈsɛp.ʃən/, electromagnetic /ɪˌlɛk.tɹoʊ.mæɡˈnɛ.tɪk/, accelerate /ɪkˈsɛl.əˌɹeɪt/, acceleration /əkˌsɛl.əˈɹeɪ.ʃən/

Les sons difficiles pour les francophones :

  • /h/ — il se souffle, il n’est pas muet: behave /bɪˈheɪv/, harness /ˈhɑɹ.nəs/
  • /r/ anglais — langue recourbée, sans frotter la gorge: astronaut /ˈæstɹəˌnɔt/, roller /ˈɹoʊlɚ/, conserve /kənˈsɜː(ɹ)v/, crumple /ˈkɹʌmpəl/, electromagnetic /ɪˌlɛk.tɹoʊ.mæɡˈnɛ.tɪk/

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 astronaut, float, behave.

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 →