跟讀練習: Astronaut Experiment: Crash Course Kids #32.2 - 通過影片學習英語口語

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Seeing is believing, right?

That's what people say, and that's why some things can be kind of hard to understand.

Things can look a certain way, but sometimes there's a lot more going on than what your eyes can show you.

Like last time we learned that all objects, no matter how massive or heavy they are, fall at the same speed on Earth.

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.

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.

Now, that's great and all, but do we know that air resistance is what affects how fast things fall here on Earth?

To figure this out, let's start by going back to our old friend, Commander Dave Scott.

He is the astronaut who dropped the feather and the hammer on the moon back in 1971.

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,

obviously, had a lot more mass than the feather.

So why did Commander Scott get different results from his experiment,

whereas if I did, the hammer would hit the ground first? has almost none.

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.

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.

But in order to prove it, we have to do an experiment, like Commander Scott's, but do it on Earth.

This looks like a job for Cartoon Sabrina.

For this experiment, she's going to need a ball, a little parachute, and a spacesuit.

First, let's watch as Mini -Me climbs up a ladder and drops a ball.

We'll see how long it takes to hit the ground and write down the data.

Now let's take the same ball and attach a little parachute to it.

We'll drop it again from the ladder

and we see it takes longer for the ball with the parachute to hit the ground.

Why?

Because there's more friction between the ball -parachute combo and the air than just the ball alone.

More friction means more air resistance, and more air resistance means a longer time to reach the ground.

That adds up, right?

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?

For this part of the experiment, we'll need to create a vacuum, an area where there is no air.

So we'll repeat the experiment in a large, airtight room and pump out all of the air, and in you go, Cartoon Sabrina.

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?

It makes sense that no air means no air resistance, right?

Let's see.

First, Cartoon Me drops the ball from the ladder again, and we record the time.

And then see what happens when we attach the ball to the parachute.

Well, now the parachute doesn't make much of a difference in how long it takes for the ball to hit the ground.

In fact, the parachute doesn't even open.

That's because in a vacuum there is no air.

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,

and that means objects dropped from the same height will hit the ground at the same time.

Scott did on the moon.

Thanks little me.

So, air resistance, or the friction between a moving object and the air, has a huge effect on how fast things fall on Earth.

We can support this argument with the evidence we got from our investigation.

When it comes to objects falling on Earth, it's the resistance that makes the difference.

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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背景與上下文

在這個影片中，我們的講解者通過對比在地球和月球上物體下落的實驗，探討了空氣阻力如何影響物體的下落速度。講解者提到，儘管地球與月球的引力相似，但由於地球有大氣，物體在下落時的表現卻截然不同。本段對話引導我們理解自然現象背後的科學原理，適合希望通過觀察學習來提高英語發音的學生們。

日常交流的五個常用短語

Seeing is believing - 看見就是相信
Air resistance - 空氣阻力
Objects fall at the same speed - 物體以相同速度下落
Different results - 不同的結果
In a vacuum - 在真空中

逐步跟讀指南

為了幫助你更好地理解並實踐影片內容，以下是一個逐步跟讀的指南，特別適合希望利用shadowing site和看YouTube學英語的學習者：

首先，觀看影片並確保理解內容，可以適當暫停來消化資訊。
在影片播放時，找到與上述短語相關的部分，重複講解者的句子，注意發音和語調。
使用文字轉錄文本，跟讀講解者的每一句話，特別注意提高英語發音的細節。
嘗試在沒有音訊輔助的情況下，再次說出相同的句子，檢驗自己是否能夠流利表達。
最後，可以選擇錄音來回聽，找出需要改進的地方，促進shadow speak和自我提升。

通過這個過程，你將不僅能理解科學現象，還能在實踐中提升你的英語口語能力，結合語言學習與科學探索的樂趣。

影片中的語法

說話人最常用的結構，並附上影片中的原話：

結構	影片中的用法
“will” 表將來 will + 動詞 — 決定、承諾或預測	We'll see · We'll drop · we'll need
“going to” 表將來 be going to + 動詞 — 計劃或明顯即將發生的事	is going to hit · she's going to need · we're going to do
義務：must / have to / need to 表示某事是必要的	have to do · have to ask · need to create

什麼是跟讀法？

跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。

影子跟讀法: 閱讀完整分步指南 →

跟讀練習: Astronaut Experiment: Crash Course Kids #32.2 - 通過影片學習英語口語

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Defining Gravity: Crash Course Kids #4.1

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Down to Earth: Crash Course Kids #4.2

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背景與上下文

日常交流的五個常用短語

逐步跟讀指南

影片中的語法

什麼是跟讀法？