Prática de Shadowing: Astronaut Experiment: Crash Course Kids #32.2 - Aprenda a falar inglês com vídeo

Criando lição...
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Seeing is believing, right?
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That's what people say, and that's why some things can be kind of hard to understand.
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Things can look a certain way, but sometimes there's a lot more going on than what your eyes can show you.
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Like last time we learned that all objects, no matter how massive or heavy they are, fall at the same speed on Earth.
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But objects can seem to fall at different speeds because of a little something called air resistance, the friction between a moving object and air.
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So if I drop a hammer and a feather from the same height at the same time, the hammer is going to hit the ground before the feather.
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Now, that's great and all, but do we know that air resistance is what affects how fast things fall here on Earth?
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To figure this out, let's start by going back to our old friend, Commander Dave Scott.
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He is the astronaut who dropped the feather and the hammer on the moon back in 1971.
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And when he dropped them both at the same time, they reached the ground, or at least, the surface of the moon, at the same time, even though the hammer,
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obviously, had a lot more mass than the feather.
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So why did Commander Scott get different results from his experiment,
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whereas if I did, the hammer would hit the ground first? has almost none.
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So as the feather falls through the air on Earth, its flat fluffy shape makes it run into a lot more air resistance than the hammer does.
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In other words, on both Earth and the moon, it's not a difference in gravity that causes the hammer to hit the ground before the feather, it's a difference in air resistance.
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But in order to prove it, we have to do an experiment, like Commander Scott's, but do it on Earth.
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This looks like a job for Cartoon Sabrina.
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For this experiment, she's going to need a ball, a little parachute, and a spacesuit.
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First, let's watch as Mini -Me climbs up a ladder and drops a ball.
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We'll see how long it takes to hit the ground and write down the data.
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Now let's take the same ball and attach a little parachute to it.
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We'll drop it again from the ladder
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and we see it takes longer for the ball with the parachute to hit the ground.
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Why?
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Because there's more friction between the ball -parachute combo and the air than just the ball alone.
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More friction means more air resistance, and more air resistance means a longer time to reach the ground.
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That adds up, right?
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But if we're going to do something like Commander Scott did on the moon, we have to ask: what would happen if there were no atmosphere?
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For this part of the experiment, we'll need to create a vacuum, an area where there is no air.
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So we'll repeat the experiment in a large, airtight room and pump out all of the air, and in you go, Cartoon Sabrina.
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What do you think will happen when Cartoon Me drops the same two things, the ball with the parachute and just the ball, in a room with no air?
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It makes sense that no air means no air resistance, right?
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Let's see.
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First, Cartoon Me drops the ball from the ladder again, and we record the time.
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And then see what happens when we attach the ball to the parachute.
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Well, now the parachute doesn't make much of a difference in how long it takes for the ball to hit the ground.
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In fact, the parachute doesn't even open.
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That's because in a vacuum there is no air.
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No air means no air resistance, and when we take away air resistance, we take away the force that slows down the object that's falling,
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and that means objects dropped from the same height will hit the ground at the same time.
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Scott did on the moon.
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Thanks little me.
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So, air resistance, or the friction between a moving object and the air, has a huge effect on how fast things fall on Earth.
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We can support this argument with the evidence we got from our investigation.
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When it comes to objects falling on Earth, it's the resistance that makes the difference.
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I may not have made it to the moon myself yet, but at least Cartoon Me has managed to recreate a famous astronaut experiment.
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Oh
📺 Mesmo canal
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Sobre Esta Lição

Nesta lição, você terá a oportunidade de explorar conceitos relacionados à resistência do ar e como ela afeta a queda de objetos na Terra. Usando experimentos práticos, como o famoso teste realizado pelo astronauta Dave Scott na Lua, você irá aprimorar suas habilidades de compreensão auditiva em inglês enquanto aprende o vocabulário técnico relacionado à física e experimentação. Essa prática é ótima para quem deseja melhorar sua prática de conversação em inglês e shadow speech. Ao se familiarizar com a terminologia científica, você poderá se expressar mais fluentemente e com confiança em discussões sobre ciência e outros temas.

Vocabulário e Frases Chave

  • Resistance do ar - Air resistance
  • Fricção - Friction
  • Experimento - Experiment
  • Gravidade - Gravity
  • Vácuo - Vacuum
  • Queda - Fall
  • Paracaídas - Parachute
  • Objetos caindo - Falling objects

Dicas de Prática

Para maximizar os benefícios da sua prática de conversação em inglês, utilize a técnica de shadowing. Ouça o vídeo e tente repetir as palavras e frases assim que elas forem ditas, imitando a entonação e o ritmo do apresentador. O tom animado e a clareza da fala o ajudarão a compreender melhor a pronúncia. Ao praticar, concentre-se em reproduzir também as pausas e as ênfases para que seu shadow speak se torne mais natural. Considere anotar algumas partes do vídeo que você acha desafiadoras e pratique-as em voz alta até se sentir confortável. Essa abordagem é eficaz em sites de shadowing e ajudará você a construir uma base sólida em sua jornada para a fluência em inglês.

Gramática neste vídeo

As estruturas que o falante mais usa, com as palavras exatas do vídeo:

EstruturaNo vídeo
Futuro com “will” will + verbo — uma decisão, promessa ou previsãoWe'll see · We'll drop · we'll need
Futuro com “going to” be going to + verbo — um plano ou algo que dá para preveris going to hit · she's going to need · we're going to do
Obrigação: must / have to / need to dizer que algo é necessáriohave to do · have to ask · need to create

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.

Técnica de shadowing: leia o guia completo passo a passo →