تدريب Shadowing: Atoms | Middle school chemistry | Khan Academy - تعلم التحدث بالإنجليزية عبر الفيديو
اختر وضع التدريب
كل وضع يفتح غرفة تدريب بملء الشاشة.
64 جمل
إذا كانت الجمل قصيرة أو طويلة جدًا، انقر على Edit لتعديلها.
1
You're walking on the street and suddenly you find a piece of gold.
2
You pick it up and you get super curious.
3
You have a lot of questions in your mind.
4
One of the questions is, what happens if you were to break it?
5
I mean, surely you can't break it with your own hands, but hey, when has that stopped you from imagining things, right?
6
So what happens if you break this?
7
Well, you get.. two pieces of gold.
8
And then you wonder, well, what if you break it even further?
9
you get even more smaller pieces.
10
And what if we break it even further?
11
We get even more smaller pieces.
12
And now you start wondering, He Can I keep doing that?
13
Can I keep breaking this piece of gold forever?
14
That's what we're gonna talk about in this video.
15
This was the question that many ancient philosophers from India, Greece, Rome, and probably many more pondered upon.
16
They wondered, if you take any element, remember what elements are?
17
These are the hundred, roughly about a hundred, building blocks that make up all the matter in the universe?
18
Yeah, gold is an example of them, okay?
19
So they wondered, if you take any element, could you keep breaking them down forever?
20
And a lot of them thought that maybe the answer is no. Maybe you can't keep breaking it forever.
21
Maybe eventually you will get one last, smallest piece of that element.
22
A smallest piece of gold, for example, which you cannot break any further.
23
A lot of people believed in this idea.
24
And the Greeks actually named this smallest piece the atom.
25
The word atom literally means uncuttable.
26
because they believe that you cannot break this even more.
27
Now, for a long time, many people didn't believe in this idea.
28
So for centuries, the idea of atom was suppressed.
29
until it was revived back by scientists like John Dalton.
30
And today we have plenty of evidence that they do exist.
31
So, What exactly are atoms?
32
Well, think of atoms as the smallest piece of an element that has all the properties of that element.
33
It is literally the building block of the element itself.
34
For example, What's a gold atom?
35
Gold atoms are the smallest pieces of gold, which has all the properties of gold.
36
They're the building blocks of gold.
37
What's a carbon atom?
38
Well, they're the smallest pieces of carbon.
39
They're the building blocks of carbon.
40
They have all the properties of carbon.
41
And just to give you another example, what's mercury atom?
42
They're the smallest pieces of mercury.
43
They have all the properties of the element mercury, and so on and so forth.
44
Now, one question you could be having is, do atoms look like tiny balls?
45
And the answer is no, it's just a representation.
46
In reality, atoms are so incredibly tiny, we can't even see them with microscopes.
47
So how tiny are they, you ask?
48
Well, their size is incredibly hard to comprehend.
49
So here's a way to think about it.
50
How many gold atoms do you think you'll find in a gold ring?
51
Typical gold ring.
52
Well, it's not millions, not billions, it's sextillions!
53
That's one followed by 21 zeros!
54
That many atoms you'll probably find in a gold ring.
55
And just to get a sense of this number, scientists estimate that that is roughly about the total number of stars in the observable universe.
56
Let that sink in.
57
That's how small atoms are.
58
So long story short, almost all the matter in the universe, from the microbes to dogs and cats to mountains to planets and stars and almost everything that you see in this universe,
59
they're all fundamentally made of elements.
60
These are the building blocks of all the matter in the universe.
61
We have about a hundred of them.
62
But what are elements fundamentally made of?
63
Elements like gold or any other element for that matter, they are fundamentally made of atoms.
64
They are the smallest pieces of the elements, the building blocks of the elements that contain all the properties of the universe of that element.
تنزيل التطبيق
كل ما تحتاجه للتحدث بطلاقة
تقييم النطق بالذكاء الاصطناعيتقييم كل جملة
تدريب IPAأتقن كل صوت
المفرداتابنِ رصيدك من الكلمات
لعبة المفرداتتعلّم أثناء اللعب
نفس القناة
B11
Introduction to ratios | Ratios, rates, and percentages | 6th grade | Khan Academy
Daily ConversationHigh School Students
B16
LearnStorm Growth Mindset: How to write a SMART goal
American AccentBusiness EnglishHigh School StudentsUniversity Students
B19
States of matter | Middle school chemistry | Khan Academy
American AccentTOEFL PrepCambridge Exam PrepHigh School Students
B12
Newton's second law | Middle school physics | Khan Academy
American AccentHigh School StudentsUniversity Students
C15
Molecules, crystals, and diatomic elements | Middle school chemistry | Khan Academy
American AccentHigh School StudentsUniversity Students
C13
Pixar in a Box | Welcome to Pixar in a Box | Khan Academy
American AccentHigh School StudentsUniversity Students
C14
Proportional reasoning with motion | AP Physics | Khan Academy
American AccentBusiness EnglishUniversity StudentsWorking Adults
C12
Biology overview
American AccentUniversity Students
C12
Newton, Leibniz, and Usain Bolt | Derivatives introduction | AP Calculus AB | Khan Academy
American AccentCambridge Exam PrepUniversity StudentsWorking Adults
B12
Elements | Middle school chemistry | Khan Academy
American AccentHigh School StudentsUniversity Students
C115
Introduction to high school physics | Khan Academy
American AccentHigh School StudentsUniversity Students
B12
Introduction to interest | Interest and debt | Finance & Capital Markets | Khan Academy
American AccentBusiness EnglishUniversity StudentsWorking Adults
C14
Derivative as slope of a tangent line | Taking derivatives | Differential Calculus | Khan Academy
American AccentCambridge Exam PrepUniversity StudentsWorking Adults
B2How to rationalize a denominator | Exponent expressions and equations | Algebra I | Khan Academy
Daily ConversationHigh School Students
FOR YOU
فيديو موصى به
B19
41 جمل
Science in English #2 | ATOMS
IELTS PrepTOEFL PrepHigh School Students
B22
134 جمل
Where Do Diamonds Come From?: Crash Course Geology #8
IELTS PrepTOEFL PrepCambridge Exam Prep
B29
91 جمل
HEISENBERG: The Dumber Oppenheimer
IELTS PrepTOEFL PrepCambridge Exam Prep
B12
25 جمل
What Is An Atom ? | Properties of Matter | Chemistry | FuseSchool
Daily ConversationHigh School Students
B14
61 جمل
Everything Is Made of Atoms?! | Lesson 2: The Atom | Science in English
TOEFL PrepHigh School StudentsUniversity Students
B13
29 جمل
Observation and Inference
TOEFL PrepHigh School StudentsUniversity Students
B157 جمل
Fractions
American AccentHigh School StudentsUniversity Students
B15
25 جمل
Friction – The Force That Opposes Motion
IELTS PrepTOEFL PrepHigh School Students
B22
68 جمل
How Small is an Atom?
IELTS PrepTOEFL PrepUniversity Students
B22
198 جمل
NASA tested my chain theory in space
IELTS PrepTOEFL PrepUniversity Students
المفردات وملاحظات التحدث لهذا الدرس
أكثر الكلمات تكرارًا في الفيديو: atom, element, gold, piece, smallest. يحتوي هذا الفيديو على 64 جملة و687 كلمة للتدرب على الترديد. مدة الكلام 4:06. يتكلم المتحدث بسرعة طبيعية، نحو 168 كلمة في الدقيقة، قريبة من المحادثة اليومية. 86% من الكلمات ضمن أكثر 3,000 كلمة شيوعًا في الإنجليزية، ويُستحسن مراجعة الباقي قبل البدء. 19 من أصل 64 جملة هي أسئلة، لذلك يناسب التدرب على نبرة السؤال والإجابات القصيرة.
أهم المفردات في هذا الفيديو
أصعب 9 كلمة في الفيديو، مع النطق والمعنى:
| الكلمة | النطق | المعنى |
|---|---|---|
| atom اسم | /ˈætəm/ | ذَرَّة |
| mercury اسم | /ˈmɜɹkjəɹi/ | زِئْبَق, زَاؤُوق |
| scientist اسم | /ˈsaɪəntəst/ | عَالِم, عَالِمَة |
| microbe اسم | /ˈmaɪkɹoʊb/ | مِيكْرُوب, جُرْثُوم |
| ponder فعل | /ˈpɑn.dəɹ/ | تَفَكَّرَ, فَكَّرَ |
| microscope اسم | /ˈmaɪ.kɹəˌskoʊp/ | مِجْهَر |
| revive فعل | /ɹɪˈvaɪ̯v/ | أَحْيَا |
| philosopher اسم | /fəˈlɑsəfɚ/ | فَيْلَسُوف |
| sink فعل | /ˈsɪŋk/ | غَطَسَ |
جمل تستحق التكرار
جمل قصيرة وكاملة من الفيديو يمكنك استخدامها في الحديث اليومي:
- Can I keep breaking this piece of gold forever?
- That's what we're gonna talk about in this video.
- They wondered, if you take any element, remember what elements are?
- Maybe you can't keep breaking it forever.
القواعد في هذا الفيديو
أكثر التراكيب التي يستخدمها المتحدث، مع العبارات نفسها من الفيديو:
| التركيب | في الفيديو |
|---|---|
| المبني للمجهول be + اسم المفعول — التركيز على ما يحدث لا على من يفعله | was suppressed · was revived |
| صيغة التفضيل the -est / the most … — الأعلى أو الأدنى في مجموعة | the smallest |
| فعل + -ing enjoy, keep, stop… + -ing — أفعال يتبعها الفعل بصيغة -ing | start wondering · keep breaking |
| المستقبل بـ “will” will + فعل — قرار أو وعد أو توقع | will get · you'll find · you'll probably find |
نطق يحتاج إلى انتباه
يستخدم المتحدث 14 من الصيغ المختصرة، مثل they're, can't, you'll. انطقها بصيغتها القصيرة كما تسمعها.
- الكلمات الطويلة — انتبه لموضع النبر: observable /əbˈzɜː.və.bəl/, philosopher /fəˈlɑsəfɚ/
أصوات يجدها متحدثو العربية صعبة:
- /p/ — ليس /b/: انطقه مع نفخة هواء: ponder /ˈpɑn.dəɹ/, microscope /ˈmaɪ.kɹəˌskoʊp/, suppress /səˈpɹɛs/, comprehend /ˌkɑmpɹɪˈhɛnd/
- /v/ — ليس /f/: مع اهتزاز الأوتار الصوتية: observable /əbˈzɜː.və.bəl/, revive /ɹɪˈvaɪ̯v/
- تتابع الصوامت — لا تضف حركة بينها: mercury /ˈmɜɹkjəɹi/, scientist /ˈsaɪəntəst/, comprehend /ˌkɑmpɹɪˈhɛnd/, sink /ˈsɪŋk/
كيف تتدرب بهذا الفيديو
- استمع إلى الفيديو كاملًا مرة واحدة دون أن تتكلم، ودوّن الكلمات التي لا تعرفها.
- ابدأ بسرعة 0.75×، وردّد جملة جملة، ثم عُد إلى السرعة العادية عندما يصبح الأمر سهلًا.
- سجّل صوتك وقارنه بالأصل، مع الانتباه إلى كلمات مثل atom, mercury, scientist.
ما هي تقنية التظليل الصوتي؟
التظليل الصوتي (Shadowing) تقنية تعلم لغة مدعومة علمياً، طُورت أصلاً لتدريب المترجمين الفوريين المحترفين. الطريقة بسيطة لكنها قوية: تستمع لصوت إنجليزي أصلي وتكرره فوراً بصوت عالٍ — كظل يتبع المتحدث بتأخير 1-2 ثانية. تُظهر الأبحاث تحسناً كبيراً في دقة النطق والتنغيم والإيقاع وربط الأصوات والاستماع والطلاقة.