Pratica di Shadowing: Candy Corn In Space - Impara a parlare inglese con i video
Creazione lezione...
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When astronauts go up in space, they're allowed to bring some special items.
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Some astronauts fly M&Ms, some people fly beef jerky.
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Don Pettit, this guy, chose candy corn.
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He's a NASA astronaut who spent nearly half a year floating around the International Space Station.
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And while he was up in space...
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I elected to spend my off-duty time doing science of my own design.
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this zero gravity candy corn demonstration.
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It's a macroscopic analogy to how a surfactant molecule works.
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And a surfactant molecule just means...
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Soap.
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So in this demo, a candy corn is equivalent to a soap molecule.
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And this water blob represents grease or oil.
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And basically the demo shows how soap cleans grease.
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Soap molecules have a water loving end...
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So they call that hydrophilic...
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And a water water-hating end.
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Hydrophobic.
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And that's important.
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Say you have a blob of oil and you throw it in a washing machine, the hydrophobic part of the molecule sticks into the grease and the oil,
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and the hydrophilic part pokes up into the water.
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In candy corn, the hydrophobic, hydrophilic sides are reversed.
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This part is water-loving, and Pettit coated this side with oil to make it water-hating.
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But the principle is the same.
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The molecules or the candy corn arrange themselves around the glob based on attraction or repulsion to water.
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Of course, that's how your clothes get clean.
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You cover them with these hydrophilic, hydrophobic molecules called soap.
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And once the soap molecules fully cover the grease blob, it becomes water-soluble.
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It's called the critical micelle concentration.
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Or in candy corn.
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The critical candy corn concentration.
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Once it hits this concentration.
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All the dirt and the oil and the grease floats off of your fabric, and it mixes with the water, and then you pour the water off, and you're left with clean clothes.
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Now in candy corn, there's a bonus science lesson.
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After you reach the critical candy corn concentration, And a most amazing thing happens.
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The blob goes from smushy to rigid.
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You can think of it like...
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Of putting the keystone in a Roman arch, where now all of a sudden gravity locks all the stones together, and you have this rigid arch that you could drive traffic across.
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But we're in space, so it's not gravity at work.
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It's surface tension holding the ball together.
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This was one of many experiments Pettit did in space, but it's the only one that used candy corn.
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I used our whole crew's supply of candy corn for this one demonstration, which I profusely apologized to the rest of the crew because they didn't get to eat any.
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For Science Friday, I'm Flora Lichtman.
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you
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Vocabolario e note di pronuncia per questa lezione
Questo video contiene 43 frasi e 455 parole da ripetere con lo shadowing. Il parlato dura 2:43. Chi parla ha un ritmo naturale di circa 168 parole al minuto, vicino a una conversazione quotidiana. Solo il 69% delle parole rientra nelle 3.000 più comuni dell’inglese, quindi il lessico è impegnativo.
Vocaboli chiave di questo video
15 parole meno comuni del video, con pronuncia e significato:
- candy /ˈkæn.di/ (sostantivo) — caramella, confetto. Crystallized sugar formed by boiling down sugar syrup.
- corn /ˈkɔːn/ (sostantivo) — grano. Any cereal plant (or its grain) that is the main crop or staple of a country or region.
- molecule /ˈmɑ.lɪ.kjul/ (sostantivo) — molecola. The smallest particle of a specific element or compound that retains the chemical properties of that element or compound; two or more atoms held together by…
- soap /soʊp/ (sostantivo) — sapone. A metallic salt derived from a fatty acid, commonly used in cleaning products.
- grease /ɡɹis/ (sostantivo) — grasso. Animal fat in a melted or soft state.
- concentration /ˌkɑn.sənˈtɹeɪ.ʃən/ (sostantivo) — concentrazione. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
- gravity /ˈɡɹævɪti/ (sostantivo) — gravità. Of an activity such as a ceremony, a person's conduct, etc.: the quality of being deeply serious and solemn, especially in a dignified manner; seriousness…
- astronaut /ˈæstɹəˌnɔt/ (sostantivo) — astronauta. A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose.
- demo /ˈdɛm.oʊ/ (sostantivo) — demo. A demonstration or visual explanation.
- demonstration /dɛmənˈstɹeɪʃən/ (sostantivo) — dimostrazione. The act of demonstrating; showing or explaining something.
- cloth /klɒθ/ (sostantivo) — stoffa, tessuto. A fabric, usually made of woven, knitted, or felted fibres or filaments, such as used in dressing, decorating, cleaning or other practical use. Sometimes…
- arch /ɑɹt͡ʃ/ (sostantivo) — arco. An inverted U shape.
- float /fləʊt/ (verbo) — galleggiare. To be supported by a fluid of greater density (than the object).
- rigid /ˈɹɪd͡ʒ.ɪd/ (aggettivo) — rigido. Stiff, rather than flexible.
- lesson /ˈlɛs.ən/ (sostantivo) — lezione. A section of learning or teaching into which a wider learning content is divided.
I phrasal verb che sentirai
- do in (verbo) — uccidere, finire. To kill or end; to defeat.
Pronuncia a cui fare attenzione
Chi parla usa 5 contrazioni e forme ridotte, come didn't, I'm, they're. Pronunciale nella forma breve, così come le senti.
- I suoni “sh” e “zh”: concentration /ˌkɑn.sənˈtɹeɪ.ʃən/, demonstration /dɛmənˈstɹeɪʃən/, wash /wɑʃ/, tension /ˈtɛnʃən/, attraction /əˈtɹækʃn̩/
- Parole lunghe — attenzione all’accento: concentration /ˌkɑn.sənˈtɹeɪ.ʃən/, demonstration /dɛmənˈstɹeɪʃən/, experiment /ɪkˈspɛɹ.ə.mənt/, apologize /əˈpɑləˌd͡ʒaɪz/, analogy /əˈnæləd͡ʒi/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Inizia a velocità 0,75×, fai shadowing frase per frase e torna alla velocità normale quando diventa facile.
- Registrati e confronta con l’originale, facendo attenzione a parole come candy, corn, molecule.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.