跟讀練習: Friction and Gravity | MightyOwl Science | 3rd Grade - 通過影片學習英語口語
選擇練習模式
每種模式都會開啟全屏練習室。
79 句
如果句子過短或過長，請點選 Edit 進行調整。
1
Hello, this is Mighty Owl.
2
Can you think about a time when you were riding your bike and you applied the brakes?
3
The bike slowed down, right?
4
Well, did you ever wonder why?
5
Here's the answer.
6
There are forces around us that cause changes to the motion of objects.
7
Let me explain.
8
A force that opposes motion is called friction.
9
It has the power to slow things down.
10
Friction is present wherever two surfaces rub over each other, such as using the brakes on a bike to stop or to slow down.
11
When you use the brakes on your bike, the brake pads apply friction to the tires, and this friction slows down the motion of the bike.
12
Think about riding your bike down a hill and how important friction is.
13
Right?
14
Friction is a force that pushes against an object to slow its motion.
15
When you're riding your scooter, for example, you drag your foot on the ground to slow it down or even stop the scooter.
16
You may have used friction in your life without even realizing it.
17
But why does friction even exist?
18
Well, friction occurs because no surface is 100% perfectly smooth.
19
Rougher surfaces like grass create more friction.
20
Have you ever tried to roller skate on grass?
21
It's pretty difficult.
22
You might even drip and fall.
23
But how about roller skating on the sidewalk in front of your house?
24
Well, that would be easier because the sidewalk is smoother than the grass, and therefore there's less friction.
25
You can see examples of friction all around you.
26
When you write with a pen, the frictional forces between the pen
27
and the paper cause some of the ink particles to stick to the surface of the paper.
28
Have you ever rubbed your hands together to keep warm?
29
The friction between your skin causes some of the energy of motion to be converted into heat.
30
Before matches were invented, people used to rub two sticks together to start a fire.
31
Just be careful if you decide to try that one out yourself.
32
Now the next time you walk around, think about your feet pushing off the ground.
33
You're applying frictional force.
34
But you might want to be careful if you're walking on an icy sidewalk sidewalk, it can get tricky because it's quite smooth and there isn't much friction for your feet to use as a grip.
35
If you slip and fall, well, that's another force entirely.
36
In fact, the force that pulls things down to the center of the earth is called gravity.
37
That's why when you jump up from the ground, you fall back no matter how hard you try to stay up in the air.
38
Wait a What about astronauts jumping on the moon and slowly falling down?
39
Well, gravity also exists on the moon, but it's not as strong as it is on the Earth.
40
That's why astronauts can jump higher and fall back down more slowly, because the Moon is much smaller than our planet, and its gravity is less.
41
Gravity is also what holds the Earth
42
and all the rest of the planets in our solar system in their orbits around the Sun.
43
Thank goodness for that!
44
or else our Earth would spin away from the sun and float out into outer space.
45
So to sum up everything so far, gravity is a pulling force that keeps us on the ground.
46
Without it, we would all be floating around in the air.
47
Now that might sound great, but can you imagine if there was no gravity on Earth?
48
You wouldn't be able to run, lay in your bed, or even play basketball.
49
Without gravity, if you kicked a ball, It would fly away in space and it would never come back.
50
Now you can't see or touch gravity, but it's always there.
51
In fact, no matter how heavy or light an object is, gravity will still pull it back down to the ground.
52
You can climb up a ladder and drop a watermelon, a feather, or a ball.
53
It doesn't matter.
54
They will all still fall back down to the ground.
55
Imagine for a second you have a cannon and you shoot a cannonball straight up into the sky.
56
No matter how high it goes, gravity will pull it back down to the ground.
57
But what if you threw a ball away from you?
58
Yep, gravity will also pull it back to the ground.
59
The force of gravity brings things down no matter what direction you throw them.
60
Wow, you know so much about forces now.
61
But maybe something you didn't know?
62
All of them in fact work together.
63
Take a look at what I mean.
64
Imagine you push a ball down a ramp.
65
The push gets the ball rolling.
66
Gravity pulls the ball down the ramp.
67
Friction pushes back and slows the ball's motion.
68
At the bottom of the ramp, the ball bumps into a wall.
69
The wall pushes back on the ball and stops it from rolling forward.
70
Well there you go!
71
All the forces we talked about do really work together in real life.
72
Two new forces from today, friction and gravity.
73
The force that opposes motion is called friction, and it has the power to slow things down.
74
The factors that affect friction are the roughness of the surfaces and the force between the two objects.
75
When you drop something on the ground, it falls because of gravity.
76
Gravity is a pulling force that pulls things down to the ground.
77
I think that's enough about forces for today.
78
See you in the next video lesson.
79
Thank you.
FOR YOU
推薦影片
A24
35 句
Forces and Motion – Magnitude and Direction
KidsTeensHigh School Students
A23
53 句
What If We Lost GRAVITY for 5 Seconds? | Gravity | Space Video | Dr Binocs Show | Peekaboo Kidz
KidsTeensDaily Conversation
A21
35 句
Introduction to Friction for Children - Friction for Kids: FreeSchool
KidsDaily Conversation
A240
42 句
Greenhouse Gases | Science for Kids
KidsTeensHigh School Students
A29
53 句
5-Minute English Conversation Practice: Health and Exercise (Healthy Habits)
KidsTeensDaily Conversation
A21
54 句
Lighthouse Lab – Floating and Sinking
KidsTeensDaily Conversation
A22
45 句
The Great Escape: Crash Course Kids #13.1
KidsTeensDaily Conversation
A22
131 句
Oxford Read and Discover Level 2 – Your Body - Read along with highlighted text
KidsTeensDaily Conversation
A114
84 句
Why Are We Becoming More Easily Distracted | Level A1 | English shadowing
KidsTeensHigh School Students
A21
385 句
Stop Studying Grammar — Just Listen | Easy English for Beginners
KidsTeensDaily Conversation
A22
69 句
What is ACID RAIN? | Acid Rain | Dr Binocs Show | Kids Learning Video | Peekaboo Kidz
KidsTeensHigh School Students
A21
41 句
Why Do We Get Goosebumps?
American AccentKidsTeensDaily Conversation
本課的詞彙與口語要點
這節 A2 級別的口語課以影片“Friction and Gravity”為素材。 影片中反覆出現的詞有：friction, gravity, force, ground, ball。 這段影片共有 79 個句子、938 個單詞可供跟讀。 講話部分時長為 5:31。 說話人語速自然，每分鐘約 170 個詞，接近日常對話。 83% 的單詞屬於英語最常用的 3,000 詞，其餘的詞建議在練習前先學一下。 全部 79 個句子中有 12 個是問句，適合練習疑問語調和簡短回答。
影片中的重點詞彙
影片中 15 個值得學習的單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| friction 名詞 | /ˈfɹɪkʃən/ | 摩擦 |
| sidewalk 名詞 | /ˈsaɪdwɔk/ | 人行道, 步道 |
| smooth 形容詞 | /smuːð/ | 平穩 /平穩, 順利 /順利 |
| grass 名詞 | /ɡɹɑːs/ | цо, 草 |
| brake 名詞 | /bɹeɪk/ | 剎車 /剎車, 制動器 /制動器 |
| float 動詞 | /fləʊt/ | 浮, 漂浮 |
| oppose 動詞 | /əˈpoʊz/ | 阻止, 對抗 /對抗 |
| skate 名詞 | /skeɪt/ | 冰鞋 |
| astronaut 名詞 | /ˈæstɹəˌnɔt/ | 太空人, 宇航員 /宇航員 |
| scooter 名詞 | /ˈskuːtə(ɹ)/ | 滑板車 /滑板車, 滑行車 /滑行車 |
| lesson 名詞 | /ˈlɛs.ən/ | 課業 /課業, -課 /-課 |
| occur 動詞 | /əˈkɜː/ | 發生 /發生 |
| dragon 名詞 | /ˈdɹæɡən/ | лун, 龍 /龍 |
| spin 動詞 | /spɪn/ | 轉動 /轉動, 自轉 /自轉 |
| slip 動詞 | /ˈslɪp/ | 滑 |
影片中出現的短語動詞
| 單詞 | 發音 | 釋義 |
|---|---|---|
| slow down 動詞 | 減速 /減速, 放慢 | |
| come back 動詞 | 回來 /回來, 返回 | |
| fall down 動詞 | /fɔl ˈdaʊn/ | 落下, 倒下 |
值得反覆跟讀的句子
影片中簡短而完整的句子，可以直接用在日常對話裡：
- Have you ever tried to roller skate on grass?
- Have you ever rubbed your hands together to keep warm?
- But maybe something you didn't know?
- I think that's enough about forces for today.
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 |
|---|---|
| 被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的 | is called · be converted · were invented |
| 現在完成時 have/has + 過去分詞 — 過去發生但與現在仍有關聯的事 | Have you ever tried · Have you ever rubbed |
| 用 “might / may” 表可能 might/may + 動詞 — 有可能但不確定的事 | may have · might even drip · might want |
| 比較級 -er than / more … than — 比較兩個事物 | smoother than · smaller than |
需要注意的發音
說話人用了 8 次縮略和弱讀形式，例如 you're, can't, didn't。請按聽到的簡短形式來說。
- “th” 音: smooth /smuːð/, feather /ˈfɛðə/
中文母語者容易讀錯的音：
- /v/ — 不要讀成 /w/，上齒輕觸下唇: gravity /ˈɡɹævɪti/, wherever /(h)wɛɹˈɛvɚ/, convert /kənˈvɝt/, invent /ɪnˈvɛnt/
- 詞尾子音 — 要讀清楚，後面不要加母音: sidewalk /ˈsaɪdwɔk/, grass /ɡɹɑːs/, brake /bɹeɪk/, float /fləʊt/, oppose /əˈpoʊz/
- /r/ 和 /l/ 的區別: roller /ˈɹoʊlɚ/, particle /ˈpɑɹtək(ə)l/
如何用這段影片練習
- 先完整聽一遍影片，不要開口，記下不認識的單詞。
- 先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
- 錄下自己的聲音並與原聲對比，特別注意 friction, sidewalk, smooth 這類單詞。
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。