Prática de Shadowing: Class Presentation: Why Is the Sky Blue? - Aprenda a falar inglês com vídeo
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34 frases
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1
Right, everyone, settle down, please.
2
Oliver's presenting his science project today.
3
Um... morning, everyone.
4
So, my question today is, why is the sky blue?
5
First, sunlight looks white, doesn't it?
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But actually, it's a mix of all the colours,
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like a rainbow, from red to violet.
8
Oh, like light through a prism?
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Yes, exactly! Brilliant.
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Now, when sunlight comes into our air,
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it hits tiny gas particles, much smaller than dust.
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Blue light has short waves,
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so it bounces around much more than red light.
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It's called Rayleigh scattering, and it fills the sky with blue!
15
Okay, let me show you a quick experiment!
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This is just water with a little milk in it.
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Could someone turn off the lights, please?
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Look! From the side, the water looks a bit blue.
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No way! It really does look blue!
20
Hang on, I've got a question.
21
If blue scatters more, why are sunsets red, then?
22
Oh... um, good question.
23
Wait, look at the torch through the end of the glass!
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Whoa, the light looks orange now!
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At sunset, light travels through much more air,
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so most of the blue gets scattered away.
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Only the red and orange light reaches our eyes!
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Oh, and violet scatters even more than blue,
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but our eyes are much better at seeing blue.
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So, that's why the sky is blue, not purple!
31
Well done, Oliver! That was excellent.
32
You started a bit quietly, though.
33
Next time, speak up from the very beginning.
34
I will. Thanks, miss!
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Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível B1 usa o vídeo “Class Presentation: Why Is the Sky Blue?”. Este vídeo tem 34 frases e 249 palavras para praticar shadowing. A fala dura 1:54. O falante mantém um ritmo estável de cerca de 131 palavras por minuto, confortável para o shadowing. 83% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.
Vocabulário principal deste vídeo
As 14 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| sunset substantivo | /ˈsʌnˌsɛt/ | crepúsculo, pôr-do-sol |
| sunlight substantivo | /ˈsʌnˌlaɪt/ | luz do sol |
| violet substantivo | /ˈvaɪ.ə.lət/ | violeta |
| dust substantivo | /dʌst/ | pó, poeira |
| experiment substantivo | /ɪkˈspɛɹ.ə.mənt/ | experimento, experiência |
| settle verbo | /ˈsɛtəl/ | resolver |
| purple substantivo | /ˈpɝ.pl̩/ | roxo, púrpura |
| quietly advérbio | /ˈkwaɪ.ɪt.li/ | silenciosamente |
| bounce verbo | /baʊns/ | rebater |
| particle substantivo | /ˈpɑɹtək(ə)l/ | partícula |
| whoa | /woʊ/ | alto!, ou! |
| torch substantivo | /ˈtɔːtʃ/ | tocha |
| scatter verbo | /ˈskætɚ/ | espalhar, dispersar |
| prism substantivo | /ˈpɹɪzəm/ | prisma |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| settle down verbo | acalmar-se |
| turn off verbo | desligar, apagar |
Pronúncia para ficar de olho
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: sunset /ˈsʌnˌsɛt/, sunlight /ˈsʌnˌlaɪt/, violet /ˈvaɪ.ə.lət/, dust /dʌst/, experiment /ɪkˈspɛɹ.ə.mənt/
- /l/ final — a língua toca o céu da boca, não vira “u”: settle /ˈsɛtəl/, particle /ˈpɑɹtək(ə)l/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como sunset, sunlight, violet.
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.