Shadowing Practice: Heat Transfer – Convection #shorts #ngscience - Learn English Speaking with Video
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11 sentences
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1
Did you know heat, the transfer of thermal energy, moves in three main ways?
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Conduction, convection, and radiation.
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Conduction happens when heat travels through solids, like a spoon warming up in hot soup.
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Radiation is heat moving through waves, like the warmth you feel from the sun. And convection.
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That's when heat moves through liquids or gases, creating currents.
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Let's take a closer look at convection.
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In this first example, as the burner heats the liquid, the warmer, less dense liquid rises and the cooler,
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denser liquid sinks, creating a continuous flow.
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This is a convection current.
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You'll see the same principle with this hot air balloon.
11
The burner heats the air inside, creating a convection current, heating the air and causing the balloon to lift.
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Vocabulary and speaking notes for this lesson
This video has 11 sentences and 126 words to shadow. The speech runs for 0:52. The speaker talks at a steady 145 words per minute, a comfortable pace for shadowing.
Key vocabulary in this video
14 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| liquid noun | /ˈlɪk.wɪd/ | A substance that is flowing, and keeping no shape, such as water; a substance of which the molecules, while not tending to separate from one another like those… |
| radiation noun | /ˌɹeɪ.diˈeɪ.ʃən/ | The shooting forth of anything from a point or surface, like diverging rays of light. |
| dense adjective | /ˈdɛns/ | Having relatively high density. |
| balloon noun | /bəˈlun/ | An inflatable buoyant object, often (but not necessarily) round and flexible. |
| burner noun | /ˈbɝnɚ/ | An element on a kitchen stove, hob, or cooktop that generates localized heat for cooking. |
| principle noun | /ˈpɹɪn.sɪ.pəl/ | A fundamental assumption, fundamental law or guiding belief. |
| continuous adjective | /kənˈtɪn.juː.əs/ | Without stopping; without a break, cessation, or interruption. |
| sink verb | /ˈsɪŋk/ | To descend or submerge (or to cause to do so) into a liquid or similar substance. |
| soup noun | /sup/ | Any of various dishes commonly made by combining liquids, such as water or stock, with other ingredients, such as meat and vegetables, that contribute the food… |
| thermal adjective | /ˈθɜːməl/ | Pertaining to heat or temperature. |
| spoon noun | /spuːn/ | An implement for eating or serving; a scooped utensil whose long handle is straight, in contrast to a ladle. |
| warmth noun | /wɔɹmθ/ | A moderate degree of heat; the sensation of being warm. |
| convection noun | /kənˈvɛkʃən/ | The transmission of heat in a fluid by the circulation of currents. |
| conduction noun | /kənˈdʌkʃən/ | The conveying of heat or electricity through material. |
Pronunciation to watch
- The “th” sounds: thermal /ˈθɜːməl/, warmth /wɔɹmθ/
- The “sh” and “zh” sounds: radiation /ˌɹeɪ.diˈeɪ.ʃən/, convection /kənˈvɛkʃən/, conduction /kənˈdʌkʃən/
- Long words — get the stress right: radiation /ˌɹeɪ.diˈeɪ.ʃən/, continuous /kənˈtɪn.juː.əs/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like liquid, radiation, dense.
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Future with “will” will + verb — a decision, promise or prediction | You'll see |
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.