Good morning friends!
How's everyone this morning?
Good?
Are you happy we've come to share a Let's Talk Science activity with you this morning?
And today is an extra special day...
because in addition to the Let's Talk Science team:
Myself - Maxime,
and there's Daniel, and Pascale.
And on top of that, we have a special guest
I'm happy to introduce you to Michael
Michael's on a big adventure.
Would you believe that he's ridden his bike most way across Canada?
His goal is to meet people like you, and like us,
to do science and share our love of science together.
We'll get started with our special activity.
It's also about a special topic... Sound!
So, now I'll turn things over to Daniel to talk to you about sound.
Thank you, Maxime.
To start off with, it's true, we'll be doing some very interesting things related to sound.
So I have a challenge for you:
Is there anyone who can make a high-pitched sound?
Like someone who's REALLY happy!
Everyone, make a high-pitched sound: AAAAAAAAAAAAAHHH!!!
Perfect.
Now, I have another challenge: Can everyone make a low-pitched voice?
Like a monster! GGRRRAAAAAAAA!!!
Do you know of any other ways we can make noise?
So, how about we try to make some rain?
It's a game I used to play when i was young. I really loved it.
To begin, start rubbing your hands together.
Now you can start to use your mouth.
And now close your eyes and think of the rain.
Now start tapping your lap lightly.
Now add the legs!
Close your eyes and think of rain.
Now let's stop the legs, but keep tapping your laps.
Only the mouth now.
And now only hands.
There you go - we just made rain.
To make sound, two things are necessary...
First off, we need AIR.
Is there any air in this room?
No? Yes? We have some "nos" and some "yeses".
How could we check?
I invite you to blow into your hands.
Do you feel some heat? And some movement?
You're moving air!
I'll show you that there's lots of air in the room. Are you ready?
Can you feel the wind?
And see your hair moving?
So now do you believe me that there's air in the room?
It's the air that does that.
Everyone together - Is there air in the room?
YES!
We also need the air to be in motion!
When a sound is produced, each air particle oscillates.
Like this.
Can you do this with your hands, too?
Each air particle moves like this.
I even have an example for you to look at here.
Can you see the movement? We call this oscillation, or vibration.
We have a game to show this.
Everybody... when you see this picture
you'll keep quite, and move around really slowly.
And when you see this picture... Make some NOISE!!!
And move around more quickly, and move your arms up and down!
Now we have another activity to share with you.
This one is a bit more visual.
This machine creates a vibration, a little lit you just did with your arms.
You see, the machine is doing the same thing as you. You can follow along with your arms like this.
And, if we want, we can do this movement faster.
And the machine can do the same thing. In fact, the machine can ever go much, much faster.
We call this increasing the frequency.
And, we can make something magical happen...
The string is vibrating. It's kind of like a jump-rope.
Maybe you'd like to come up for a closer look? C'mon, come up closer.
Calmly, please. One person at a time.
I want to see a line here.
Did you notice when you touched the string that it was vibrating, and you could feel it moving?
You can feel the same movement in your vocal cords.
Did you know, when you talk, there are cords inside your throat that vibrate?
So now we'll ask you to each take a finger.
And put it on your throat, right here, gently.
And now make a high-pitched noise: AAAAAAAAAAHHH...
Did you feel anything?
Yes? Now we'll do it again, but this time with a low-pitched voice, okay?
Did you feel anything?
Can you see the sound here? Well... actually, the vibration?
We can increase the frequency...
So, I'll increase the speed at which it's moving.
Oh. Did you hear the sound?
Is it high? Yeah?
And now?
Even higher still.
And I have one last thing to tell you: Did you know that...
Young children, you're special.
Your ears... are young. They're brand-new.
So you're able to hear higher-pitched sounds than us.
For example... put your hand up if you can hear something.
Okay, because it's off, there's nothing to hear.
Now, can you hear something?
Personally, I can't hear anything.
That's really special, because none of the adults in the room can hear a thing.
But the kids can hear just fine. It's like you have super-powers to hear sounds that us adults can't.
So, to recap...
We can make noise in several ways:
We can... clap.
We can speak.
We can use our mouths.
We need two things to make sound:
AIR!
And what does the air need to do...?
move.
A little question for you... Do you like SCIENCE?
Yes? I can't hear you.
I didn't hear... do you like science?
YEEEESSS!!!
So now we're making sound to profess our love of science.
Can we make the sound: "Thank you"?
THANK YOU!!!
Now, who wants to go outside and see Michael's bike?
Thanks again to everyone who gave me such a warm welcome in Moncton.
First and foremost, thanks to Maxime and his team at Let's Talk Science: Daniel, Pascale and Alexandre.
Thank you Julie and everyone at the Garderie l'Eveil.
And finally, thank you to Anthony for the article he wrote about us in Acadie Nouvelle: "Nous Somme Tous les Scientifiques".
***This was my first time writing subtitles for one of my videos - please let me know if you have any feedback.
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