쉐도잉 연습: Science in English #4 | Compounds and chemical formulas - 영상으로 영어 말하기 배우기
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1
Good morning, everyone.
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Today we are going to learn about compounds and chemical formulas.
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We will discover how different elements combine to form new substances.
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Let's get started.
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Let's begin with a simple comparison.
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The English language has only 26 letters, yet those letters can create millions of words and sentences.
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Nature is very similar.
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About 118 elements combine to create millions of different substances.
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So, what do we call these new substances?
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Today, we will find out.
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Let's begin with our learning objectives.
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By the end of this lesson, you will understand what a compound is.
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You will learn about chemical bonds.
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You will recognize a molecule.
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You will also learn how to read chemical formulas.
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So what is a compound?
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A compound is a substance made from the chemical combination of two or more different elements.
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When different elements join together, they form a completely new substance.
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Let's look at some examples.
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Water, or H2O, is a compound.
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It is made from hydrogen and oxygen.
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carbon dioxide, or CO2, is another compound.
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It is made from carbon and oxygen.
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Compounds are all around us in our everyday lives.
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How do atoms stay together?
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They are connected by a chemical bond.
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A group of bonded atoms is called a molecule.
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A water molecule has two hydrogen atoms and one oxygen atom.
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A chemical formula shows the number of atoms in one molecule.
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The small number is called a subscript.
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It tells us how many atoms of each element are present.
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For example, H2O, CO2, and C12H22O11 are all chemical formulas.
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Now let's compare.
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H2O is a compound.
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CO2 is also a compound.
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But O2 is not a compound.
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Why?
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Because it contains only one element.
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A compound must contain two or more different elements.
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Let's review what we have learned today.
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Compounds are made from two or more different elements.
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Atoms are connected by chemical bonds.
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A molecule is the smallest unit of many compounds.
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Chemical formulas show the fixed ratio of atoms.
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Thank you for listening.
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이 레슨의 어휘와 말하기 포인트
이 영상에는 섀도잉할 문장 45개와 단어 341개가 있습니다. 말하는 구간의 길이는 2:51입니다. 화자는 분당 약 120단어의 일정한 속도로 말해서 섀도잉하기에 편한 속도입니다. 영어에서 가장 많이 쓰이는 3,000단어에 속하는 단어가 74%뿐이라 어휘가 어려운 편입니다.
이 영상의 핵심 어휘
영상에 나오는 덜 흔한 단어 15개를 발음, 뜻과 함께 정리했습니다.
- compound /ˈkɑmpaʊnd/ (명사) — 화합물. Anything made by combining several things.
- element /ˈɛləmənt/ (명사) — 요소. One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers of anything are based.
- atom /ˈætəm/ (명사) — 원자, 아톰. The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
- formula /ˈfɔː.mjʊ.lə/ (명사) — 공식. Any mathematical rule expressed symbolically.
- substance /ˈsʌbstəns/ (명사) — 물질. Physical matter; material.
- molecule /ˈmɑ.lɪ.kjul/ (명사) — 분자. The smallest particle of a specific element or compound that retains the chemical properties of that element or compound; two or more atoms held together by…
- oxygen /ˈɑksɪd͡ʒən/ (명사) — 산소. The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental…
- connect /kəˈnɛkt/ (동사) — 잇다, 연결하다. To join (to another object): to attach, or to be intended to attach or capable of attaching, to another object.
- combine /kəmˈbaɪn/ (동사) — 조합하다, 결합하다. To bring (two or more things or activities) together; to unite.
- hydrogen /ˈhaɪdɹəd͡ʒ(ə)n/ (명사) — 수소. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
- lesson /ˈlɛs.ən/ (명사) — 수업, 과. A section of learning or teaching into which a wider learning content is divided.
- compare /kəmˈpɛɚ/ (동사) — 비교하다, 비유하다. To assess the similarities and differences between two or more things [“to compare X with Y”]. Having made the comparison of X with Y, one might have found it…
- discover /dɪˈskʌvə/ (동사) — 발견하다. To find or learn something for the first time.
- ratio /ˈɹeɪ.ʃoʊ/ (명사) — 비, 비율. A number representing a comparison between two named things.
- objective /ɒbˈd͡ʒɛk.tɪv/ (명사) — 목적. A material object that physically exists.
이 영상으로 연습하는 방법
- 먼저 말하지 않고 영상을 끝까지 듣고 모르는 단어를 적어 둡니다.
- 보통 속도로 한 문장씩 섀도잉하고, 화자의 리듬과 맞을 때까지 반복합니다.
- 자신의 목소리를 녹음해 원본과 비교하고, compound, element, atom 같은 단어에 특히 주의합니다.
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | is made · are connected · is called |
| “will” 미래 will + 동사 — 결정, 약속 또는 예측 | will discover · will find · will understand |
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.