Shadowing Practice: Invisible ink science experiment - Learn English Speaking with Video
Elige un modo de práctica
Cada modo abre una sala de práctica a pantalla completa.
106 oraciones
Si las oraciones son demasiado cortas o largas, haz clic en Editar para ajustarlas.
1
Has your kid ever wanted to be a spy or maybe write secret coded notes to their siblings or their friends?
2
Well, today I have an experiment for exactly that called secret friendship notes.
3
Hi everyone, I'm Emily Calandrelli, MIT engineer and host of Emily's Wonder Lab.
4
And on my channel, we learn about all things space and science.
5
So grab some turmeric because we are about to go on a mission.
6
Keep exploring.
7
And this sounds like.
8
Skate carrier.
9
And keep exploring.
10
Today for our secret friendship notes, we are going to draw a secret message with a baking soda solution, set it aside to dry,
11
and then once it's dry, we are going to reveal it with a turmeric solution.
12
Okay?
13
So for our baking soda solution, what you need is one cup of water plus one tablespoon of baking soda.
14
To draw your message, you'll want a few paintbrushes, and then later for your turmeric solution,
15
you want one half cup water with one teaspoon of turmeric.
16
And parents and adults, if you've worked with turmeric before, you know that it stains everything.
17
Fingers and counters and bowls and basically anything it touches.
18
So please exercise caution here.
19
It is why I have my tinfoil on the counter because I'm trying to save this counter from the turmeric.
20
So just be careful here.
21
So first, we are going to make our baking soda solution.
22
This is going to be our paint that we paint the secret message
23
that you're not going to be able to see after it dries.
24
So let's go ahead and do one cup of water.
25
Right in a bowl.
26
And now, let's add one tablespoon of baking soda.
27
Just like this.
28
And then go ahead and mix it up.
29
You'll notice that the baking soda won't completely dissolve in the water, and that's okay.
30
If you have a little bit of baking soda on the bottom, that's all right.
31
We're just trying to create as much of a baking soda solution as we can
32
because it's the baking soda that is the very key ingredient to our secret message here.
33
Once you've mixed that up about as good as you can, we're going to take our paintbrush and use this
34
and our baking soda solution to write our secret message on a piece of computer paper.
35
So I'm going to take one sheet of computer paper here,
36
set this aside and write my message here trying to get as much baking soda on your paintbrush as you can.
37
Tap it off.
38
You don't want it to be too wet.
39
Okay, now that I've written my secret message, I'm going to set it aside to dry.
40
It'll take between 10 minutes to an hour, really depending on how much water you use on your paper.
41
But if you want this message to be completely secret,
42
You want it to be completely dry because once it's completely dry because the baking soda is white
43
It's so hard to see this is the secret part of these secret friendship notes
44
So try to let it completely dry before you move on to the next step
45
Once your secret friendship note is dry
46
You can give it to a friend with the magic reveal paint and the magic reveal paint is our turmeric solution
47
So let's go ahead and make that we're going to do one half cup water there plus plus one teaspoon turmeric.
48
I'm using my one half teaspoon here because it fits in the turmeric because I'm just trying to avoid spills here.
49
One half teaspoon plus, plus one half teaspoon equals one teaspoon.
50
I'm gonna go ahead and mix this up.
51
Again, it'll be a little clumpy.
52
This is because turmeric is not soluble in water.
53
It's soluble in alcohol, but we're just gonna do our best here.
54
We just wanna suspend the turmeric in the water as best we can.
55
Now here's the fun part.
56
So we're going to take our turmeric solution
57
and with a big paintbrush you're going to tell your friend
58
that to reveal the secret message they just need to paint the paper with the magic reveal paint.
59
You just want to go ahead and paint the entire thing.
60
I'm going to take my secret message here and I'm just going to paint on top of it.
61
Because look at this.
62
It's very hard to see what this says.
63
Right?
64
What is my secret note saying?
65
I don't know.
66
Let's reveal it.
67
Here we go.
68
Look at that.
69
Look at the turmeric reacting with our baking soda here.
70
Do you see what's happening?
71
Look at this.
72
Everywhere that our turmeric is touching the paper, it's yellow, kind of what you would expect, like the color of turmeric.
73
But when it touches the part where we had baking soda, do you see the color it turned?
74
It turns red.
75
Why does that happen?
76
Well, it's because turmeric is something known as a natural pH indicator.
77
which means it changes colors when it's in the presence of an acid and a base.
78
What is baking soda?
79
Well, it's sodium bicarbonate or a base.
80
And so when turmeric interacts with baking soda, it turns red.
81
It goes from yellow to red to indicate that it is in the presence of a base.
82
Here's a trick to make your secret note even more secretive use cardstock
83
because cardstock doesn't absorb the water as much so you don't have those obvious ripples in the paper.
84
It takes a little longer for the water to dry but once it does it's even harder to see your message.
85
So let's go ahead and reveal this one.
86
Get my turmeric secret reveal paint on my paintbrush.
87
Watch with each brush stroke I'm revealing a part of my secret message.
88
You see what it says here?
89
It says, Stay curious and keep exploring.
90
You send your friend this message, but they have no idea what it says.
91
You tell them to reveal it with your magic turmeric paint.
92
Let's see.
93
You see what it says?
94
Meat in the treehouse.
95
Home.
96
And the best part is that your secret friendship note smells amazing.
97
Very spicy.
98
Smells great.
99
Thank you for making secret friendship notes with me.
100
If you like this one, be sure to check out my bestselling
101
Stay Curious and Keep Exploring book series for 99 more science experiments.
102
I'm Emily Calandrelli.
103
Subscribe for all things science and space.
104
And remember, stay curious and keep exploring.
105
I'll see you next time.
106
Emily's Science Lab
Descargar app
Todo lo que necesitas para hablar con fluidez
Pronunciación con IAEvalúa cada oración
Práctica de IPADomina cada sonido
VocabularioConstruye tu banco de palabras
Juego de vocabularioAprende mientras juegas
FOR YOU
Recomendar Video
A21
180 oraciones
Real life NATURAL English to Practice With Your Child 🍂
KidsDaily ConversationWorking Adults
A21
113 oraciones
The UFO Mystery | Home Safety Rules for Kids | Police Cartoon | Sheriff Labrador
KidsDaily Conversation
B129
13 oraciones
We Tried 4 Alternatives to Mentos in Cola… Which One Works Best?
KidsDaily Conversation
A22
40 oraciones
Shadow | Science for Kids
KidsDaily Conversation
A23
31 oraciones
unit 6 grade 6 spelling #animation
KidsDaily Conversation
A23
62 oraciones
Why Does Cooking Eggs Make Them Hard? | The Science of Cooking | SciShow Kids
KidsDaily Conversation
A24
20 oraciones
The Secret Ingredient
KidsTeensDaily Conversation
A21
20 oraciones
EASY SCIENCE EXPERIMENTS TO DO AT HOME
KidsDaily Conversation
A22
159 oraciones
Vlog 💦: Henry's Classroom Prank Went WRONG... THEN He FREAKED OUT! 😱🍫 | Slow English (A2)
KidsDaily Conversation
A21
25 oraciones
How to Bake a Cake Kids' Style
KidsDaily Conversation
A26
117 oraciones
FLYERS 2 TEST 2 PART 4
KidsDaily Conversation
B15
218 oraciones
Revealing 5 Secret Magic Tricks With Science
KidsDaily Conversation
Vocabulario y notas de pronunciación para esta lección
Esta lección de conversación se basa en el vídeo “Invisible ink science experiment”. Las palabras que más se repiten: secret, turmeric, baking, soda, message. Este vídeo tiene 106 frases y 1095 palabras para practicar shadowing. La parte hablada dura 7:15. El hablante habla a un ritmo natural de unas 151 palabras por minuto, cercano a una conversación cotidiana. El 83 % de las palabras está entre las 3.000 más comunes del inglés; conviene repasar el resto antes de empezar.
Vocabulario clave de este vídeo
15 palabras del vídeo que vale la pena aprender, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| soda sustantivo | /ˈsoʊdə/ | sosa, soda |
| bake verbo | /beɪk/ | hornear, enhornar |
| reveal verbo | /ɹɪˈviːl/ | revelar, propalar |
| friendship sustantivo | /ˈfɹɛn(d)ʃɪp/ | amistad, amistanza (disused) |
| explore verbo | /ɪkˈsploɹ/ | explorar |
| curious adjetivo | /ˈkjʊɹ.i.əs/ | curioso, tener curiosidad |
| experiment sustantivo | /ɪkˈspɛɹ.ə.mənt/ | experimento |
| finger sustantivo | /ˈfɪŋɡɚ/ | dedo, alambres |
| trick sustantivo | /ˈtɹɪk/ | truco, artimaña |
| acid sustantivo | /ˈæsɪd/ | ácido |
| sheet sustantivo | /ʃit/ | hoja, folio |
| indicate verbo | /ˈɪndɪˌkeɪt/ | indicar |
| carrier sustantivo | /ˈkæɹi.ɚ/ | transportista |
| brush sustantivo | /bɹʌʃ/ | pincel, cepillo |
| depend verbo | /dɪˈpɛnd/ | depender/pender (de), ser dependiente (de) |
Phrasal verbs que vas a escuchar
| Palabra | Pronunciación | Significado |
|---|---|---|
| go ahead verbo | /ˌɡoʊ əˈhɛd/ | venga, adelante |
| check out verbo | investigar, chequear |
Frases que vale la pena repetir
Frases cortas y completas del vídeo que puedes reutilizar en la conversación diaria:
- You don't want it to be too wet.
- What is my secret note saying?
- Do you see what's happening?
- You see what it says here?
- You see what it says?
Gramática en este vídeo
Las estructuras que más usa el hablante, con las palabras exactas del vídeo:
| Estructura | En el vídeo |
|---|---|
| Present perfect have/has + participio pasado — una acción pasada que sigue importando ahora | you've worked · I've written |
| Verbo + -ing enjoy, keep, stop… + -ing — verbos seguidos de la forma en -ing | Keep exploring |
| Superlativos the -est / the most … — lo más alto o lo más bajo de un grupo | our best · the best |
| Futuro con “going to” be going to + verbo — un plan o algo que se ve venir | are going to draw · are going to reveal · are going to make |
Pronunciación a tener en cuenta
El hablante usa 34 contracciones y formas reducidas, como I'm, we're, don't. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “sh” y “zh”: friendship /ˈfɹɛn(d)ʃɪp/, sheet /ʃit/, brush /bɹʌʃ/, caution /ˈkɔːʃ(ə)n/, paintbrush /ˈpeɪntˌbɹʌʃ/
- Palabras largas — cuida el acento: experiment /ɪkˈspɛɹ.ə.mənt/, indicator /ˈɪn.dɪˌkeɪ.tə(ɹ)/, ingredient /ɪnˈɡɹiːdi.ənt/, bicarbonate /baɪˈkɑɹ.bə.neɪt/
Sonidos difíciles para hispanohablantes:
- s + consonante al inicio — sin añadir una “e” delante: spill /spɪl/, spicy /ˈspaɪsi/, skate /skeɪt/, stain /steɪn/
- /v/ — no es /b/: los dientes tocan el labio inferior: reveal /ɹɪˈviːl/, dissolve /dɪˈzɑlv/, secretive /ˈsiːkɹɪtɪv/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como soda, bake, reveal.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.