Pratique du Shadowing: Science in English #4 | Compounds and chemical formulas - Apprendre l'anglais à l'oral avec la vidéo

Choisissez un mode d'entraînement

Chaque mode ouvre une salle d'entraînement en plein écran.

45 phrases
Si les phrases sont trop courtes ou trop longues, cliquez sur Edit pour les ajuster.
1
Good morning, everyone.
2
Today we are going to learn about compounds and chemical formulas.
3
We will discover how different elements combine to form new substances.
4
Let's get started.
5
Let's begin with a simple comparison.
6
The English language has only 26 letters, yet those letters can create millions of words and sentences.
7
Nature is very similar.
8
About 118 elements combine to create millions of different substances.
9
So, what do we call these new substances?
10
Today, we will find out.
11
Let's begin with our learning objectives.
12
By the end of this lesson, you will understand what a compound is.
13
You will learn about chemical bonds.
14
You will recognize a molecule.
15
You will also learn how to read chemical formulas.
16
So what is a compound?
17
A compound is a substance made from the chemical combination of two or more different elements.
18
When different elements join together, they form a completely new substance.
19
Let's look at some examples.
20
Water, or H2O, is a compound.
21
It is made from hydrogen and oxygen.
22
carbon dioxide, or CO2, is another compound.
23
It is made from carbon and oxygen.
24
Compounds are all around us in our everyday lives.
25
How do atoms stay together?
26
They are connected by a chemical bond.
27
A group of bonded atoms is called a molecule.
28
A water molecule has two hydrogen atoms and one oxygen atom.
29
A chemical formula shows the number of atoms in one molecule.
30
The small number is called a subscript.
31
It tells us how many atoms of each element are present.
32
For example, H2O, CO2, and C12H22O11 are all chemical formulas.
33
Now let's compare.
34
H2O is a compound.
35
CO2 is also a compound.
36
But O2 is not a compound.
37
Why?
38
Because it contains only one element.
39
A compound must contain two or more different elements.
40
Let's review what we have learned today.
41
Compounds are made from two or more different elements.
42
Atoms are connected by chemical bonds.
43
A molecule is the smallest unit of many compounds.
44
Chemical formulas show the fixed ratio of atoms.
45
Thank you for listening.

Télécharger l'application

Tout pour parler couramment

Prononciation IAChaque phrase notée
Phonétique (IPA)Maîtrisez chaque son
VocabulaireEnrichissez votre lexique
Jeu de vocabulaireApprenez en jouant
Scanner le QR
Scanner le QR
Download on theApp StoreGet it onGoogle Play

Même chaîne

Why Are Elements Arranged This Way? | LESSON 4-The Periodic Table | Science in EnglishB1
3

Why Are Elements Arranged This Way? | LESSON 4-The Periodic Table | Science in English

Daily ConversationHigh School Students
What are substances made of ? | Lesson 5: MOLECULES—SIMPLE SUBSTANCES&COMPOUNDS | Science in EnglishC1
2

What are substances made of ? | Lesson 5: MOLECULES—SIMPLE SUBSTANCES&COMPOUNDS | Science in English

Daily ConversationUniversity Students
Science in English #7 | Properties of Homogeneous MixturesB1
4

Science in English #7 | Properties of Homogeneous Mixtures

Daily ConversationHigh School Students
Science in English #3 | The Periodic TableB1
6

Science in English #3 | The Periodic Table

Daily ConversationHigh School StudentsUniversity Students
Science in English #2 | ATOMSB1
9

Science in English #2 | ATOMS

IELTS PrepTOEFL PrepHigh School Students
Everything Is Made of Atoms?! | Lesson 2: The Atom | Science in EnglishB1
4

Everything Is Made of Atoms?! | Lesson 2: The Atom | Science in English

TOEFL PrepHigh School StudentsUniversity Students
Do these symbols mean anything to you? | Lesson 3: Chemical Elements | Science in EnglishB1
5

Do these symbols mean anything to you? | Lesson 3: Chemical Elements | Science in English

Daily ConversationHigh School Students
Science in English #6 | Types of MixturesB1
6

Science in English #6 | Types of Mixtures

TOEFL PrepHigh School StudentsUniversity Students
Science in English #1 | ELEMENTSB1
13

Science in English #1 | ELEMENTS

IELTS PrepTOEFL PrepHigh School Students
FOR YOU

Vidéo recommandée

States of matter | Middle school chemistry | Khan AcademyB1
9
87 phrases

States of matter | Middle school chemistry | Khan Academy

American AccentTOEFL PrepCambridge Exam PrepHigh School Students
Lis ngày 10/7 Tôi nghe tiếng anh thì đẳng cấp thôi rồiB1
1
187 phrases

Lis ngày 10/7 Tôi nghe tiếng anh thì đẳng cấp thôi rồi

TOEFL PrepTOEIC PrepBusiness English
Part 2: Science subjectB1
4
21 phrases

Part 2: Science subject

IELTS PrepTOEFL PrepHigh School Students
Atoms | Middle school chemistry | Khan AcademyB1
3
64 phrases

Atoms | Middle school chemistry | Khan Academy

American AccentTOEFL PrepCambridge Exam PrepHigh School Students
SUMMARIZE SPOKEN TEXT - DNA & RNAC1
7
31 phrases

SUMMARIZE SPOKEN TEXT - DNA & RNA

IELTS PrepTOEFL PrepUniversity Students
bài học 13 - 2C1
2
31 phrases

bài học 13 - 2

IELTS PrepTOEFL PrepUniversity Students
The Building Blocks of Everything: Matter & its PropertiesC1
4
41 phrases

The Building Blocks of Everything: Matter & its Properties

IELTS PrepTOEFL PrepUniversity Students
What Are Covalent Bonds | Properties of Matter | Chemistry | FuseSchoolC1
1
58 phrases

What Are Covalent Bonds | Properties of Matter | Chemistry | FuseSchool

Daily ConversationUniversity Students
SCIENCE 4 1 new - Life in an ecosystemC1
23
49 phrases

SCIENCE 4 1 new - Life in an ecosystem

IELTS PrepTOEFL PrepUniversity Students
Carbon... SO SIMPLE: Crash Course Biology #1C1
1
155 phrases

Carbon... SO SIMPLE: Crash Course Biology #1

IELTS PrepTOEFL PrepUniversity Students

Vocabulaire et conseils d’expression pour cette leçon

Cette vidéo contient 45 phrases et 341 mots à répéter en shadowing. La partie parlée dure 2:51. Le locuteur parle à un rythme régulier d’environ 120 mots par minute, confortable pour le shadowing. Seuls 74 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.

Vocabulaire clé de cette vidéo

15 mots moins courants de la vidéo, avec leur prononciation et leur sens :

  • compound /ˈkɑmpaʊnd/ (nom) — composé. Anything made by combining several things.
  • element /ˈɛləmənt/ (nom) — élément. 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/ (nom) — atome. 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/ (nom) — formule. Any mathematical rule expressed symbolically.
  • substance /ˈsʌbstəns/ (nom) — substance. Physical matter; material.
  • molecule /ˈmɑ.lɪ.kjul/ (nom) — molécule. 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/ (nom) — oxygène. 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/ (verbe) — accoupler, connecter. To join (to another object): to attach, or to be intended to attach or capable of attaching, to another object.
  • combine /kəmˈbaɪn/ (verbe) — combiner. To bring (two or more things or activities) together; to unite.
  • hydrogen /ˈhaɪdɹəd͡ʒ(ə)n/ (nom) — hydrogène. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
  • everyday /ˈɛvɹiˌdeɪ/ (adjectif) — usuel. Appropriate for ordinary use, rather than for special occasions.
  • lesson /ˈlɛs.ən/ (nom) — leçon. A section of learning or teaching into which a wider learning content is divided.
  • compare /kəmˈpɛɚ/ (verbe) — comparer. 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/ (verbe) — découvrir. To find or learn something for the first time.
  • ratio /ˈɹeɪ.ʃoʊ/ (nom) — rapport, ratio. A number representing a comparison between two named things.

Les verbes à particule que vous entendrez

  • find out (verbe) — découvrir, savoir. To discover, as by asking or investigating.
  • look at (verbe) — regarder. To observe or watch.

Comment s’entraîner avec cette vidéo

  1. Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
  2. Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
  3. Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme compound, element, atom.

La grammaire de cette vidéo

Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :

StructureDans la vidéo
Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le faitis made · are connected · is called
Futur avec « will » will + verbe — une décision, une promesse ou une prédictionwill discover · will find · will understand

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

Technique du shadowing : lire le guide complet étape par étape →