Pratique du Shadowing: Identifying Chemical Properties - Apprendre l'anglais à l'oral avec la vidéo

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Hi everyone.
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Today, we're going to do problems that involve us identifying chemical properties.
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Let's take a look at the example problem we have below.
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identify the chemical properties below.
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So we have to take a look at all the properties we have here and see which ones are chemical properties.
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Before we go on to do that, let's think about what chemical properties are.
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Remember, chemical properties are things that we can only observe
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during a chemical reaction so a change or an attempt to change the chemical composition of a substance.
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so here Toxicity toxicity has to do with how how bad something is for you.
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So toxicity, how does it change the chemical composition to make something Worse, let's say, for your body.
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so toxicity would be an example of a chemical property because we could only observe it through a change
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and how in and effects a chemical reaction.
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So something in your body, your body is run with chemical reactions, and
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If something is toxic to those chemical reactions or a drug is toxic to those chemical reaction it's because it
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changed or messed with the chemical reaction.
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So that must mean it is a chemical property.
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So, flammability is also an example.
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of a physical property of a chemical property, sorry.
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Chemical property, that just means Can't it.
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be observed without changing the chemical composition of something?
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No, it can't.
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We have to burn something to see if it if it changes.
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And by doing that, we're doing a chemical reaction.
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conductivity we could see if something transfers electricity or heat without changing the chemical composition.
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So that must mean C. is out.
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Viscosity means how thick something is or how hard it is to get through it.
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Let's say if you try to put your hand through water, it goes through pretty easily.
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But if you try to put your hand through water, syrup it wouldn't go through as easily and so this is also an example
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of something that we don't need to observe using a chemical reaction.
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D is out of there.
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Now, E, radioactivity, is tricky.
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it's something that involves sending out radiation.
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But this only happens through chemical processes and we can't observe it or measure it,
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without it changing the chemical chemical properties, the chemical composition of a substance.
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So, that must mean it's also a chemical property,
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because again, chemical properties only can be observed if something changes about the chemical composition.
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About This Lesson

In this lesson, learners will practice identifying chemical properties through a range of examples. By focusing on properties like toxicity, flammability, and radioactivity, learners will gain insights into how these properties can only be observed during chemical reactions. As they engage with the material, they will also improve their vocabulary related to chemistry, which is essential for effective communication in scientific discussions. This lesson is designed to enhance your English speaking skills while deepening your understanding of scientific principles.

Key Vocabulary & Phrases

  • Chemical properties: Characteristics of a substance that can only be observed during a chemical reaction.
  • Toxicity: The degree to which a substance can harm living organisms.
  • Flammability: The ability of a substance to ignite and burn.
  • Conductivity: The ability of a material to conduct electricity or heat.
  • Viscosity: A measure of a fluid's resistance to flow or movement.
  • Radioactivity: The emission of radiation as a result of nuclear reactions involving changes in an atom's nucleus.

Practice Tips

For effective learning, consider using a shadowing app that allows you to align your speech with the natural flow of the video. This method can significantly enhance your IELTS speaking practice by improving your pronunciation and fluency. Make sure to listen carefully to how the instructor emphasizes specific words related to chemical properties, such as toxicity and flammability. Repeat these terms aloud, mimicking the tone and rhythm of the speaker.

When practicing, pause the video after each section to reflect on what you have just learned. This will reinforce your understanding while giving you a chance to articulate your thoughts in English. Consider using Shadowspeaks or other resources that focus on shadow speech to practice your skills further. Remember, the key is to maintain a steady pace that matches the speed of the video so that your responses become more fluid over time.

Additionally, create real-life sentences using the vocabulary from the lesson to connect these terms with daily conversations. This approach not only enriches your vocabulary but also makes your English practice through learn English with YouTube more engaging and practical.

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 →