Shadowing Practice: Why is hot air WAVY? (only for curious) - Learn English Speaking with Video

Do you remember when you are driving on the road

and it's a sunny day and the air in the distance seems kind of wavy?

Or when you are sitting at a campfire and the air right above the campfire is somehow blurred?

I always questioned this as a kid, but now that I have all the knowledge that I need to explain it to myself, and I believe you do too, I never bothered to do so.

And even though I'm not the smartest person of all, I tried to break it down into few simple terms to be able to explain it to you.

Since the air is hotter, it has more heat.

And heat is just a form of energy.

And that energy actually transforms even into speed.

So the molecules of the air, in the hotter air, are a lot faster.

But because they are faster, they tend to push into each other a lot more.

And because they push with faster speeds, they actually push a lot stronger.

And because they push a lot stronger, they actually start to bump into each other into much bigger distances.

And what this causes is a much lower density of the air because it's just a lot more spread out.

So the density of the air only depends on how hot it is.

And because the hotter air is actually getting created on the ground where the heat is coming from, the lowest layer of the air actually has the least amount of density.

So what it automatically does is it starts exchanging with the layer that is above it because it has more density.

So it exchange.

And once it starts exchanging, you can see

that what starts happening is this chain reaction of the air actually starting to form these lines

that are going above and each other.

But then if we don't see air, how are we seeing this change? something called refraction of light

comes into play refraction is the process of bending light waves

and all that determines how the light comes into our eyes is the substance

that it comes through in this case either hot air

or cold air if you can imagine these hot

and cold layers of air actually exchanging constantly

and the light passing through them it actually isn't going straight

what it is doing is it's constantly bending through these layers

so and so because the light that is delivered then to our eyes bent

so many times before it came into our eyes our brain

automatically perceives the coming thing as a bit of vibrating and so that's why it always seems a bit wavy.

But if this is true, have you ever seen this happen with cold air?

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Vocabulario y notas de pronunciación para esta lección

Esta lección de conversación de nivel B1 se basa en el vídeo “Why is hot air WAVY?”. Las palabras que más se repiten: density, layer, push, exchanging, hotter. Este vídeo tiene 32 frases y 463 palabras para practicar shadowing. La parte hablada dura 2:07. El hablante habla rápido, unas 218 palabras por minuto, así que espera sonidos enlazados y reducidos. El 87 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es fácil de seguir.

Vocabulario clave de este vídeo

Las 13 palabras más avanzadas del vídeo, con su pronunciación y significado:

Palabra	Pronunciación	Significado
bend verbo	/bɛnd/	cimbrar, cimbrear
campfire sustantivo	/ˈkæmpˌfaɪ̯ɚ/	fogata, hoguera
refraction sustantivo	/ɹəˈfɹækʃən/	refracción
wavy adjetivo	/ˈweɪvi/	ondulante, ondeante
vibrate verbo	/ˈvaɪ.bɹeɪt/	vibrar
blur verbo	/blɝ/	desdibujar, difuminar
molecule sustantivo	/ˈmɑ.lɪ.kjul/	molécula
perceive verbo	/pɚˈsiv/	percibir, apercibirse de
bump sustantivo	/bʌmp/	bache, bulto
transform verbo	/tɹænsˈfɔɹm/	trasformar, transformar
sunny adjetivo	/ˈsʌni/	asoleado, soleado
depend verbo	/dɪˈpɛnd/	depender/pender (de), ser dependiente (de)
substance sustantivo	/ˈsʌbstəns/	sustancia, substancia

Phrasal verbs que vas a escuchar

Palabra	Significado
pass through verbo	atravesar

Gramática en este vídeo

Las estructuras que más usa el hablante, con las palabras exactas del vídeo:

Estructura	En el vídeo
Verbo + -ing enjoy, keep, stop… + -ing — verbos seguidos de la forma en -ing	starts exchanging · starts happening
Superlativos the -est / the most … — lo más alto o lo más bajo de un grupo	the smartest · the lowest
Present continuous am/is/are + -ing — algo que ocurre ahora o en estos días	are driving · are sitting · is actually getting

Pronunciación a tener en cuenta

El hablante usa 3 contracciones y formas reducidas, como don't, I'm, isn't. Dilas en su forma corta, tal como las oyes.

Sonidos difíciles para hispanohablantes:

/v/ — no es /b/: los dientes tocan el labio inferior: wavy /ˈweɪvi/, vibrate /ˈvaɪ.bɹeɪt/, perceive /pɚˈsiv/

Cómo practicar con este vídeo

Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
Grábate y compara con el original, prestando atención a palabras como bend, campfire, refraction.

¿Qué es la Técnica de Shadowing?

Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.

Técnica de shadowing: lee la guía completa paso a paso →

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