Pratica di Shadowing: Glow in the Dark Lava Lamp! - Impara a parlare inglese con i video

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Have you ever wondered why do highlighters seem to glow so brightly?
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We are going to learn about all of this and more today with my glowing lava lamp experiment.
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Hi everyone, I'm Emily Calandrelli,
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MIT engineer and host of Emily's Wonder Lab on Netflix and on my channel we learn about all things science and space.
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So grab those highlighters and those black lights
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because this kitchen is about to glow for this one
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you're going to need a glass of water filled about
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three -fourths the way up a yellow highlighter pliers oil to
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fill your glass the rest of the way up a black light
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and a fourth cup of salt adults
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and parents you'll want to do this one take your pliers
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and grab the inside of the end of your highlighter and just bend it in, bend it towards the center and pop, it comes right off.
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Now, I'm gonna wear gloves for this one.
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You don't need to because it is just highlighter ink after all, but I don't want my fingers to get stained, so I'm going to.
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So go ahead and take the tube that's inside the highlighter out.
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This contains your highlighter ink.
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Now, what you wanna do is squeeze it inside your glass of water.
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Three, two, one.
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Doesn't that look so cool?
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Now you'll notice that the highlighter seems to glow even though we don't have our black light on.
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Why is that?
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Well, it's because highlighter contains phosphors and phosphors make this fluorescent.
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That means it has the ability to absorb ultraviolet light and reinvent some of that light as visible light,
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light we see with our eyes basically it means it glows
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but where is the ultraviolet light right that usually comes from our black light
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but we don't have that on there is always ambient ultraviolet light in any room
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that you're in and
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that is what is making our highlighter glow next you want to take your oil
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and fill your glass the rest of the way up
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so you'll notice that the oil is rising to the top this is because oil is less dense than water.
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So it's going to float right on top of the water.
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And now we can make this glow.
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Three, two, one.
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Oh, look at that.
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So you can see everywhere that the highlighter is, is glowing.
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It is actually fluorescing.
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And now we can transform this into a lava lamp with our salt.
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So what you want to do is just take a handful of salt.
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I'm going to go ahead and turn my light on so it's glowing as we do this.
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And you may need this much, you may not.
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It depends on how many times you want to do your lava lamp.
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But just go ahead and take a handful of salt and sprinkle it all across the top.
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The salt is denser than the oil and the water
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and as it falls down through the oil it grabs on to some of
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that oil bringing the oil down to the bottom
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but then the salt dissolves and that oil is released back up to the top
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because remember oil is less dense than water
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so it rises back up to the top creating
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that lava lamp effect another way to create your lava lamp effect is with alka -seltzer tablets just go ahead
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and throw these in just like this and those bubbles are bubbling to the top.
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Now if you want to experiment within the experiments you can try different oils, you can try sugar instead of salt,
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and you can try different highlighter colors just to see what happens.
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If you try any of these let me know what you find.
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Thanks for making glow -in -the -dark lava lamps with me.
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If you like this one check out my best -selling
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Stay Curious and Keep Exploring series for 99 more science experiments that are fun for the whole family.
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I'm Emily Calandrelli.
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Subscribe to learn about all things science and space.
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And remember to stay curious and keep exploring.
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I'll see you next time.

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Vocabolario e note di pronuncia per questa lezione

Questa lezione di conversazione si basa sul video “Glow in the Dark Lava Lamp!”. Le parole che ritornano più spesso: highlighter, oil, glow, salt, lava. Questo video contiene 60 frasi e 693 parole da ripetere con lo shadowing. Il parlato dura 4:11. Chi parla ha un ritmo naturale di circa 166 parole al minuto, vicino a una conversazione quotidiana. Il 84% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.

Vocaboli chiave di questo video

15 parole del video che vale la pena imparare, con pronuncia e significato:

ParolaPronunciaSignificato
glow verbo/ɡloʊ/brillare
lamp sostantivo/ˈlæ̝mp/lampada, lampadina
lava sostantivo/ˈlɑvə/lava
experiment sostantivo/ɪkˈspɛɹ.ə.mənt/esperimento
dense aggettivo/ˈdɛns/denso
curious aggettivo/ˈkjʊɹ.i.əs/curioso, interessato
explore verbo/ɪkˈsploɹ/esplorare, investigare
bubble sostantivo/ˈbʌbəl/bolla
bend verbo/bɛnd/curvare, piegare
handful sostantivo/ˈhæn(d)fʊl/manipolo, gruppetto
finger sostantivo/ˈfɪŋɡɚ/dito, dita
visible aggettivo/ˈvɪzɪb(ə)l/visibile
tube sostantivo/tuːb/tubo, tubetto
depend verbo/dɪˈpɛnd/dipendere
transform verbo/tɹænsˈfɔɹm/trasformare, modificare

I phrasal verb che sentirai

ParolaPronunciaSignificato
go ahead verbo/ˌɡoʊ əˈhɛd/procedere, andare avanti
check out verboinvestigare
fall down verbo/fɔl ˈdaʊn/cadere

Frasi da ripetere

Frasi brevi e complete del video che puoi riutilizzare nella conversazione di tutti i giorni:

  • Have you ever wondered why do highlighters seem to glow so brightly?
  • Doesn't that look so cool?
  • I'll see you next time.

La grammatica di questo video

Le strutture che chi parla usa di più, con le parole esatte del video:

StrutturaNel video
Comparativi -er than / more … than — confrontare due coseless dense than · denser than
Verbo + -ing enjoy, keep, stop… + -ing — i verbi seguiti dalla forma in -ingKeep Exploring
Present continuous am/is/are + -ing — qualcosa che succede adesso o in questo periodois making · is rising · is glowing
Futuro con “going to” be going to + verbo — un piano o qualcosa che si vede arrivareare going to learn · you're going to need · gonna wear

Pronuncia a cui fare attenzione

Chi parla usa 18 contrazioni e forme ridotte, come I'm, don't, you'll. Pronunciale nella forma breve, così come le senti.

  • Parole lunghe — attenzione all’accento: experiment /ɪkˈspɛɹ.ə.mənt/, ultraviolet /ˌʌltɹəˈvaɪələt/

I suoni difficili per chi parla italiano:

  • /h/ — va soffiata, non è muta: handful /ˈhæn(d)fʊl/, highlighter /ˈhaɪ.laɪt.ɚ/
  • Consonante finale — senza aggiungere una vocale dopo: lamp /ˈlæ̝mp/, experiment /ɪkˈspɛɹ.ə.mənt/, dense /ˈdɛns/, curious /ˈkjʊɹ.i.əs/, bend /bɛnd/
  • /æ/ — più aperta della “e”: lamp /ˈlæ̝mp/, handful /ˈhæn(d)fʊl/, tablet /ˈtæblət/, transform /tɹænsˈfɔɹm/, absorb /æbˈsɔɹb/

Come esercitarsi con questo video

  1. Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
  2. Inizia a velocità 0,75×, fai shadowing frase per frase e torna alla velocità normale quando diventa facile.
  3. Registrati e confronta con l’originale, facendo attenzione a parole come glow, lamp, lava.

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.

Tecnica dello shadowing: leggi la guida completa passo dopo passo →