Prática de Shadowing: Glow in the Dark Lava Lamp! - Aprenda a falar inglês com vídeo
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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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Vocabulário e dicas de fala para esta lição
Esta aula de conversação usa o vídeo “Glow in the Dark Lava Lamp!”. As palavras que mais se repetem: highlighter, oil, glow, salt, lava. Este vídeo tem 60 frases e 693 palavras para praticar shadowing. A fala dura 4:11. O falante fala em ritmo natural, cerca de 166 palavras por minuto, próximo de uma conversa do dia a dia. 84% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.
Vocabulário principal deste vídeo
15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| glow verbo | /ɡloʊ/ | brilhar |
| lamp substantivo | /ˈlæ̝mp/ | luminária, lâmpada |
| lava substantivo | /ˈlɑvə/ | lava |
| experiment substantivo | /ɪkˈspɛɹ.ə.mənt/ | experimento, experiência |
| dense adjetivo | /ˈdɛns/ | denso |
| curious adjetivo | /ˈkjʊɹ.i.əs/ | curioso |
| explore verbo | /ɪkˈsploɹ/ | explorar |
| bubble substantivo | /ˈbʌbəl/ | bolha, borbulha |
| bend verbo | /bɛnd/ | dobrar, curvar |
| handful substantivo | /ˈhæn(d)fʊl/ | palmo |
| finger substantivo | /ˈfɪŋɡɚ/ | dedo (da mão) |
| visible adjetivo | /ˈvɪzɪb(ə)l/ | visível |
| tube substantivo | /tuːb/ | tubo, bisnaga |
| depend verbo | /dɪˈpɛnd/ | depender |
| tablet substantivo | /ˈtæblət/ | tabuleta |
Phrasal verbs que você vai ouvir
| Palavra | Pronúncia | Significado |
|---|---|---|
| go ahead verbo | /ˌɡoʊ əˈhɛd/ | vai em frente |
| check out verbo | verificar, sacar só |
Frases que vale a pena repetir
Frases curtas e completas do vídeo que você pode usar na conversa do dia a dia:
- Have you ever wondered why do highlighters seem to glow so brightly?
- Doesn't that look so cool?
- I'll see you next time.
Gramática neste vídeo
As estruturas que o falante mais usa, com as palavras exatas do vídeo:
| Estrutura | No vídeo |
|---|---|
| Comparativos -er than / more … than — comparar duas coisas | less dense than · denser than |
| Verbo + -ing enjoy, keep, stop… + -ing — verbos seguidos da forma em -ing | Keep Exploring |
| Present continuous am/is/are + -ing — algo que está acontecendo agora ou nestes dias | is making · is rising · is glowing |
| Futuro com “going to” be going to + verbo — um plano ou algo que dá para prever | are going to learn · you're going to need · gonna wear |
Pronúncia para ficar de olho
O falante usa 18 contrações e formas reduzidas, como I'm, don't, you'll. Diga-as na forma curta, do jeito que você ouve.
- Palavras longas — acerte a sílaba tônica: experiment /ɪkˈspɛɹ.ə.mənt/, ultraviolet /ˌʌltɹəˈvaɪələt/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: lamp /ˈlæ̝mp/, experiment /ɪkˈspɛɹ.ə.mənt/, bend /bɛnd/, tube /tuːb/, depend /dɪˈpɛnd/
- /l/ final — a língua toca o céu da boca, não vira “u”: bubble /ˈbʌbəl/, handful /ˈhæn(d)fʊl/, visible /ˈvɪzɪb(ə)l/, sprinkle /ˈspɹɪŋkəl/
- /h/ — um sopro suave, diferente do “r”: handful /ˈhæn(d)fʊl/, highlighter /ˈhaɪ.laɪt.ɚ/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como glow, lamp, lava.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.