Shadowing-Übung: Invisible ink science experiment - Englisch Sprechen Lernen mit Video
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Has your kid ever wanted to be a spy or maybe write secret coded notes to their siblings or their friends?
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Well, today I have an experiment for exactly that called secret friendship notes.
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Hi everyone, I'm Emily Calandrelli, MIT engineer and host of Emily's Wonder Lab.
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And on my channel, we learn about all things space and science.
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So grab some turmeric because we are about to go on a mission.
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Keep exploring.
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And this sounds like.
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Skate carrier.
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And keep exploring.
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Today for our secret friendship notes, we are going to draw a secret message with a baking soda solution, set it aside to dry,
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and then once it's dry, we are going to reveal it with a turmeric solution.
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Okay?
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So for our baking soda solution, what you need is one cup of water plus one tablespoon of baking soda.
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To draw your message, you'll want a few paintbrushes, and then later for your turmeric solution,
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you want one half cup water with one teaspoon of turmeric.
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And parents and adults, if you've worked with turmeric before, you know that it stains everything.
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Fingers and counters and bowls and basically anything it touches.
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So please exercise caution here.
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It is why I have my tinfoil on the counter because I'm trying to save this counter from the turmeric.
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So just be careful here.
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So first, we are going to make our baking soda solution.
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This is going to be our paint that we paint the secret message
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that you're not going to be able to see after it dries.
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So let's go ahead and do one cup of water.
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Right in a bowl.
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And now, let's add one tablespoon of baking soda.
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Just like this.
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And then go ahead and mix it up.
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You'll notice that the baking soda won't completely dissolve in the water, and that's okay.
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If you have a little bit of baking soda on the bottom, that's all right.
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We're just trying to create as much of a baking soda solution as we can
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because it's the baking soda that is the very key ingredient to our secret message here.
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Once you've mixed that up about as good as you can, we're going to take our paintbrush and use this
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and our baking soda solution to write our secret message on a piece of computer paper.
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So I'm going to take one sheet of computer paper here,
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set this aside and write my message here trying to get as much baking soda on your paintbrush as you can.
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Tap it off.
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You don't want it to be too wet.
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Okay, now that I've written my secret message, I'm going to set it aside to dry.
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It'll take between 10 minutes to an hour, really depending on how much water you use on your paper.
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But if you want this message to be completely secret,
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You want it to be completely dry because once it's completely dry because the baking soda is white
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It's so hard to see this is the secret part of these secret friendship notes
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So try to let it completely dry before you move on to the next step
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Once your secret friendship note is dry
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You can give it to a friend with the magic reveal paint and the magic reveal paint is our turmeric solution
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So let's go ahead and make that we're going to do one half cup water there plus plus one teaspoon turmeric.
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I'm using my one half teaspoon here because it fits in the turmeric because I'm just trying to avoid spills here.
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One half teaspoon plus, plus one half teaspoon equals one teaspoon.
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I'm gonna go ahead and mix this up.
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Again, it'll be a little clumpy.
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This is because turmeric is not soluble in water.
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It's soluble in alcohol, but we're just gonna do our best here.
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We just wanna suspend the turmeric in the water as best we can.
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Now here's the fun part.
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So we're going to take our turmeric solution
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and with a big paintbrush you're going to tell your friend
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that to reveal the secret message they just need to paint the paper with the magic reveal paint.
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You just want to go ahead and paint the entire thing.
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I'm going to take my secret message here and I'm just going to paint on top of it.
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Because look at this.
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It's very hard to see what this says.
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Right?
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What is my secret note saying?
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I don't know.
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Let's reveal it.
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Here we go.
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Look at that.
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Look at the turmeric reacting with our baking soda here.
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Do you see what's happening?
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Look at this.
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Everywhere that our turmeric is touching the paper, it's yellow, kind of what you would expect, like the color of turmeric.
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But when it touches the part where we had baking soda, do you see the color it turned?
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It turns red.
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Why does that happen?
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Well, it's because turmeric is something known as a natural pH indicator.
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which means it changes colors when it's in the presence of an acid and a base.
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What is baking soda?
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Well, it's sodium bicarbonate or a base.
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And so when turmeric interacts with baking soda, it turns red.
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It goes from yellow to red to indicate that it is in the presence of a base.
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Here's a trick to make your secret note even more secretive use cardstock
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because cardstock doesn't absorb the water as much so you don't have those obvious ripples in the paper.
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It takes a little longer for the water to dry but once it does it's even harder to see your message.
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So let's go ahead and reveal this one.
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Get my turmeric secret reveal paint on my paintbrush.
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Watch with each brush stroke I'm revealing a part of my secret message.
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You see what it says here?
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It says, Stay curious and keep exploring.
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You send your friend this message, but they have no idea what it says.
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You tell them to reveal it with your magic turmeric paint.
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Let's see.
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You see what it says?
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Meat in the treehouse.
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Home.
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And the best part is that your secret friendship note smells amazing.
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Very spicy.
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Smells great.
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Thank you for making secret friendship notes with me.
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If you like this one, be sure to check out my bestselling
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Stay Curious and Keep Exploring book series for 99 more science experiments.
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I'm Emily Calandrelli.
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Subscribe for all things science and space.
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And remember, stay curious and keep exploring.
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I'll see you next time.
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Emily's Science Lab
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Wortschatz und Sprechhinweise zu dieser Lektion
Diese Sprechübung basiert auf dem Video „Invisible ink science experiment“. Diese Wörter kommen am häufigsten vor: secret, turmeric, baking, soda, message. Dieses Video enthält 106 Sätze und 1095 Wörter zum Nachsprechen. Der gesprochene Teil dauert 7:15. Der Sprecher spricht in natürlichem Tempo, etwa 151 Wörter pro Minute, ähnlich wie im Alltagsgespräch. 83 % der Wörter gehören zu den 3.000 häufigsten im Englischen; den Rest solltest du dir vor dem Üben ansehen.
Wichtiger Wortschatz in diesem Video
15 lernenswerte Wörter aus dem Video, mit Aussprache und Bedeutung:
| Wort | Aussprache | Bedeutung |
|---|---|---|
| soda Substantiv | /ˈsoʊdə/ | Soda |
| bake Verb | /beɪk/ | backen |
| reveal Verb | /ɹɪˈviːl/ | enthüllen |
| friendship Substantiv | /ˈfɹɛn(d)ʃɪp/ | Freundschaft |
| explore Verb | /ɪkˈsploɹ/ | erforschen |
| curious Adjektiv | /ˈkjʊɹ.i.əs/ | neugierig |
| experiment Substantiv | /ɪkˈspɛɹ.ə.mənt/ | Experiment, Versuch |
| finger Substantiv | /ˈfɪŋɡɚ/ | Finger |
| trick Substantiv | /ˈtɹɪk/ | List, Falle |
| acid Substantiv | /ˈæsɪd/ | Säure |
| sheet Substantiv | /ʃit/ | Blatt, Bogen |
| indicate Verb | /ˈɪndɪˌkeɪt/ | anzeigen, anweisen |
| carrier Substantiv | /ˈkæɹi.ɚ/ | Träger |
| brush Substantiv | /bɹʌʃ/ | Bürste, (paint-) Pinsel |
| depend Verb | /dɪˈpɛnd/ | abhängen, ankommen |
Phrasal Verbs, die du hören wirst
| Wort | Aussprache | Bedeutung |
|---|---|---|
| go ahead Verb | /ˌɡoʊ əˈhɛd/ | vorausgehen |
| check out Verb | überprüfen |
Sätze zum Wiederholen
Kurze, vollständige Sätze aus dem Video, die du im Alltag wiederverwenden kannst:
- 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?
Grammatik in diesem Video
Die Strukturen, die der Sprecher am häufigsten verwendet, mit den genauen Worten aus dem Video:
| Struktur | Im Video |
|---|---|
| Present Perfect have/has + Partizip Perfekt – eine vergangene Handlung, die jetzt noch wichtig ist | you've worked · I've written |
| Verb + -ing enjoy, keep, stop … + -ing – Verben, auf die die -ing-Form folgt | Keep exploring |
| Superlativ the -est / the most … – das Höchste oder Niedrigste einer Gruppe | our best · the best |
| Zukunft mit „going to“ be going to + Verb – ein Plan oder etwas, das sich abzeichnet | are going to draw · are going to reveal · are going to make |
Aussprache, auf die du achten solltest
Der Sprecher verwendet 34 Kurzformen und abgeschwächte Formen, zum Beispiel I'm, we're, don't. Sprich sie in der kurzen Form, so wie du sie hörst.
- Die Laute „sh“ und „zh“: friendship /ˈfɹɛn(d)ʃɪp/, sheet /ʃit/, brush /bɹʌʃ/, caution /ˈkɔːʃ(ə)n/, paintbrush /ˈpeɪntˌbɹʌʃ/
- Lange Wörter – auf die Betonung achten: experiment /ɪkˈspɛɹ.ə.mənt/, indicator /ˈɪn.dɪˌkeɪ.tə(ɹ)/, ingredient /ɪnˈɡɹiːdi.ənt/, bicarbonate /baɪˈkɑɹ.bə.neɪt/
Laute, die Deutschsprachigen schwerfallen:
- Stimmhafter Auslaut — /b/, /d/, /g/, /z/, /v/ am Wortende nicht verhärten: acid /ˈæsɪd/, depend /dɪˈpɛnd/, subscribe /səbˈskɹaɪb/, absorb /æbˈsɔɹb/, suspend /səsˈpɛnd/
- /æ/ — offener als „ä“: acid /ˈæsɪd/, carrier /ˈkæɹi.ɚ/, react /ɹiːˈækt/, interact /ɪn.təˈɹækt/, absorb /æbˈsɔɹb/
So übst du mit diesem Video
- Höre dir das ganze Video einmal an, ohne zu sprechen, und notiere die Wörter, die du nicht kennst.
- Beginne mit 0,75-facher Geschwindigkeit, sprich Satz für Satz nach und wechsle zur normalen Geschwindigkeit, sobald es leichtfällt.
- Nimm dich auf und vergleiche mit dem Original; achte dabei auf Wörter wie soda, bake, reveal.
Was ist die Shadowing-Technik?
Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.