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Welcome to our second lesson on our unit focusing on sound.

Now, I'm Miss Harris, and today we are going to be learning about what is sound? What is it? We're going to find out.

So let's take a look at our timetable.

Today we are going to be recapping what a scientist is.

We're going to be looking at what a sound is, the definition of sound, we're going to be making some sounds, and then we're going to look at how we measure the volume of sound.

Now, the volume is how loud or how quiet something is.

We're then going to look our sound experiment for this week.

In this lesson, you will need an exercise book and a piece of paper, if you've got one, a pencil, a coloured pencil so that you could do some editing, and of course your brain.

A scientist is a person who.

Can you remember those actions? So let's do them together.

A scientist is a person who studies the world around us, including the living and nonliving.

Do you remember those actions? You do, well done, let's see them one more time.

So, a scientist is a person who studies the world around us, including the living and nonliving.

So things that are not living and things that are living.

So we are living.

Let's take a look at our star words.

These are the important words that we are going to be saying in this lesson, it's important we practise them now.

So it's going to be my time then your turn.

You're ready? So copy my actions? Star words, star words, your turn.

Sound, hearing, volume.

Your turn, senses, pitch, decibels, decibels.

Good job, we're going to look at what that means later on in today's lesson.

So, if my timer was to go off.

Maybe I set a timer on the oven or on the microwave or on my phone to wake me up in the morning, which of these senses, our five senses, which one would I be using for sound? Which sense would I be using? I would be using my sense of hearing, well done, because I'd be hearing my alarm going off.

I could hear it dinging in the background either telling me to wake up or do something.

Now, you might have also said touch because maybe you need to turn the alarm off.

So you need to touch it to turn it off, but to know that it's going off, you will hear it, or it might vibrate, maybe your phone like when someone calls you.

So today we are looking at what sound is.

Now I'd like you to take your finger, point your screen.

I'm going to ask you to follow the definition in a moment with your finger, are you ready? So, put your finger on the word sound, ready? Is on the word sound? So sound is a wave of vibrations that travel through the air.

Let's read this time with your finger.

Sound is a wave of vibrations that travel through the air.

Now, these vibrations in the air, we cannot see them.

It means that when you cause a sound, you make that move around you, it vibrates, which helps to create the sound.

So, now we've read that definition.

I would like you to fill in the gaps.

What is sound? Sound is a vibrations that through the what's around us.

Pause the video and write that sentence down filling in the gaps.

Well done, let's check our answer.

So, get your coloured pen or pencil, and you're going to tick or fix.

That means you're going to tick it if it's right, but maybe you didn't get it right, you're going to fix it to make it right.

Because it's okay to make mistakes, because Miss Harris makes them all the time, I always make mistake, so it's fine.

So let's check.

Sound is a wave of vibrations that travel through the, can you say it, air, well done.

Now, if you didn't get this right, don't worry.

You can pause the video now and check your answers.

So hopefully now you've checked them and you've got lots of texts on your piece of paper.

Well done.

Now let's take a look at what sound is.

So sound is a wave that travels through solids, liquids and gases.

We're going to have a look at that in a moment.

So first sound to be made, in order to make a sound.

We have to make a movement first.

So let's choose the movement clapping.

Try clapping your hands, ready? Can you do it again? Clap your hands.

Did you hate your clap? You did.

Now, when we clap our hands.

You vibrate, you close a movement in the air around your hands, which makes the sound.

So when we clap, you make the air around your hands vibrate.

I mean, it looks a bit like this, but we can't see them, but this is what's happening, it's a wave in the air.

And once you've made the sound, you will hear it with your ear.

Let's practise, let's make the sound.

We're going to clap our hands.

That cause the air to vibrate, to cause a wave in the air.

And that way it goes into your ear, we can't see it, it's not like a wave of water.

So ready, let's do it again.

So when you clapped, the air vibrated and it went into your ear.

You have the air vibrate around you.

Now, what I want you to do, this is really exciting, you have caused the air to vibrate to create a sound, using your body, using your hands.

Can you go and tell someone in your house and tell them that when you clap your hands you can make the air vibrate around you to cause the sound.

You created that sound, that wave of vibrations that goes into your ear.

So even if I clap further away from my ear, I can still hear it.

That wave in the air, the imaginary wave goes into my ear.

Go and tell someone that you can make your own sound.

Okay, now I talked about how a sound can travel through a solid, a liquid and a gas.

If we have a look here, we've got some examples.

Now, a solid can be like a door, a door is a solid.

Then we've got liquid like water.

If you was swimming and you went under the water, and you said hello.

Someone would be able to hear you under the water because sound travels through water, through a liquid.

And gas, air that we breathe, the oxygen.

take a deep breath that oxygen, that gas, helps, the sound travels through gases, and air is a gas.

So as I'm talking to you now, and the sound is coming out of your tablet or your laptop, it's travelling through a gas, which is air, and into your ear.

Let's have a look at what it's like if I stand behind a door, let's see if you can still hear me.

Can you hear me talking through the door, through a solid? A door is a solid.

Can you hear me talking through the glass, which is a solid? Now I would like you to, in a moment, I'd like you to pause the video and see how many different sounds you could make with your body.

I'm going to make one.

I know that a sound that I can make is I can whistle, ready? Did you hear that? I made a sound with my lips.

That's a sound that I made with my body.

I could also make a sound like this.

I can pat the back of my hand to make a sound.

Or maybe I can make a sound like this.

That creates the a sound by blowing raspberry.

Can you see how many different sounds you can make with your body? Pause the video, have a go at that now.

Make sure you're counting in your head how many you can make.

How many did you make, how many sounds? Wow, that's so many.

So you could have stumped, you could have sung with your voice, sing a lovely song, because that makes a sound.

You could clap, you could sneeze, that would make a sound, because what Miss Harris sneezes, my sneezes are quite loud so you can hear them for a long way away.

A cough is a sound as well.

And a whistle and also makes a makes a sound.

Maybe you've had different ones.

Well done if you did.

So, I mentioned that my sneeze is really loud, and you could hear it from quite far away.

That is called volume.

The loudness of a sound is called it's volume.

So if I talk really loud, you can hear me really clearly with what I'm saying.

But if I whisper, it's quite hard for you to hear me, because it's not as clear as when I'm speaking really loud.

You can describe the volume of my voice as being loud like this or you can describe as being really quite, because the loudness of a sound is called it's volume.

Can you say that with me? The loudness of a sound is called it's.

I'm going to miss in gaps, and you're going to say.

The loudness, well done, of a sound is called it's volume, well done.

Can you whisper the word volume.

Can you say it again, I didn't hear, volume.

Can you say volume really loud, volume.

That was very loud, nearly pulled me out of my chair with all that noise Now, have a look at this question.

I would like to sit quietly for a moment, and I'd like you to close your eyes like this.

Are your eyes closed? I don't think they're closed.

Close both of them.

I'm not going to do anything, so close your eyes.

Are they closed? I would like you to listen to the loudest sound that you can hit the sound you can hear.

What is the loudest sound, a sound you can hear so clearly? At the moment it's probably my voice, might be the loudest thing that you can hear.

I want, I'm going to be quite in a moment, I want you to listen.

What is the loudest sound that you can hear? Okay, open your eyes.

What sound did you hear that was really really loud? Okay, great.

So, I would like you to pause the video and fill in the gaps of the sentence.

It says, the loudest sound I can hear is.

And then go ahead and write it down.

Pause the video and write that down now.

Great, well done.

The loudest sound that I can hear is, I can hear a car outside my house and the engine is running, it's really, really loud.

Now, get ready.

I would now like, close your eyes again.

And I'd like you to listen to the quietest sound that you can hear.

One sound that you can hear very clearly.

You can hear it very far away in the distance.

So close your eyes and listen.

Okay, open your eyes.

I would like you to now fill in this sentence.

The quietest sound I can hear is, hmm.

I would like you to write that down now if you can.

Great job, you are working so hard.

Now the quietest sound I can hear, I can hear a bird tweeting in the distance.

I can just about hear it, is quite quiet, and I can hear it every now and then, it's quiet.

You might have something different and that's okay.

So, earlier I talked about this word, decibels.

Did you say it? Say it one more time, decibels.

Decibel is what we use to measure the volume of a sound, so how loud or how quiet it is.

So, if I was to measure the sound of my voice shouting like this, the decibels are probably going to be really, really high.

But if I was to whisper, the decibels would be really, the number would be lower.

Let's have a look.

So here I've got a scale.

Let me make it a bit bigger.

So on one side I have got breathing, normal breathing, just breathing in and breathing out.

Not breathing in like this and breathing out like this That's going to be a lot louder, isn't it? Just breathing normally, when you don't realise that your body is breathing naturally for you.

That's levelled, that's measured at 10 decibels.

And we write it using these letters, dB, a capital B, which is short for decibels.

So, normal breathing is at this side of the scale, because it's really quiet.

Whereas a rocket launch, the buzz of sound of a rocket is measured at 180 decibels because it's so loud.

I'm going to give you some examples.

So, remember this side is the quietest and this side is the loudest.

I've given you hit some different sounds, and I would like you to draw a line in your book on your paper, and I would like you to put these on the line to show where you think they go.

Is it the quiet sound? Is it going to be next to breathing? Is it going to be next to the rocket launch because it's really loud? So I would like you to put them on my scale, okay? So pause the video and have a go at putting these on my scale now.

Well done, let's have a look at the answers.

So, here is my scale.

So I've got, I have light train, shouting, storm and a whisper.

So let's see, the first one that I think that goes on my scale is whispering, because whispering is a little bit louder than breathing, but it's still a really quite sound.

Then we've got some light rain.

So the rain coming down, it's not very loud.

It's just coming down from the clouds, it's a bit louder than whisper, but it's not too loud.

Then I think shouting comes next, because shouting is quite loud.

But if I was on a field, a really big field and I shouted from one side, you might not be able to hear me, because maybe my voice is not, my shout is not loud enough.

But a shout is definitely louder than some light, peaceful rain.

And then we've got storm.

Thundering lightening storm is definitely going to be louder than a shout.

And then last thing we have got our rocket launch, which is the loudest sound that I could think of at the time.

So a rocket launch is definitely louder than a storm.

So a rocket is so loud, you have to wear headphones to protect our ears.

Now, it's time for the exciting part, are you ready? I don't think you're ready.

Get ready, get ready, it's time for a sound experiment.

This is what you are going to need for your experiment.

You will need an exercise book or a piece of paper, a pencil and most importantly, these two things here.

What are they? Your ears, have you got, you have left them somewhere.

No, go and get them if you don't have them.

Oop, mine nearly fell off, just joking.

So, experiment this week is focusing on this question, because when we do an experiment, we need a question that's going to focus what we are doing.

Because we are not just doing an experiment without having a focus.

So our question is, what sounds can you here in the morning compared to at nighttime? So this means you might have to ask your parent or carer.

If you can stay up a little bit later past your bedtime to hear what sounds you can hear.

It doesn't have to be dark because when now into the summer season, so it doesn't get dark until really late at night, which might be a bit too past your bedtime.

So around till bedtime, you can listen to the sounds outside to hear if they are different from the sounds when you wake up nice and early in the morning.

So this is what you're going to do.

You're going to gather your paper and your pencil because you're going to write things down.

You're going to either go outside, maybe you have a garden and you can step outside in the morning or at nighttime.

Or if you don't have a garden, I don't have a garden, I have balcony, so maybe I could go on there.

You might be able to open a window and listen to the sounds outside.

You can then sit quietly for a moment like we did in the last one, you could close your eyes and just really listen.

Because when you're looking, you will be looking for the sound, you'll be using your sense of sight.

Whereas I want you to use your hearing to your ears.

So if we close our eyes, we're not looking for the sound, we're listening.

That's the important part.

We're using our ears for listening.

You're then going to write down what you can hear.

Is it about tweeting? Is it a car? Maybe there's lots of cars that go past your house, or an aeroplane.

Maybe that's what you can hear, maybe there's more aeroplanes in the morning than at night time.

Maybe you can hear people outside your house, maybe you live on a busy street and people are walking past, or a ding of a bike, anything.

There's going to be loads of sounds that you could write down.

And then you are going to write down whether you have this sound at nighttime, okay? So if you hear a car alarm in the morning when you're doing your experiment, I want you to see if you can hear that at nighttime as well, because remember, we're seeing whether the sounds we hear in the morning are the sounds we hear at night, okay, great.

You have worked really hard today.

Can you give yourself a self five.

That means, get your hand, give yourself a five.

Did you hear that clap? You just made a high-five sound.

The clapping sound good job.

Now, I would also like to do something called rainbow cheer.

Do you know of rainbow cheer is? So at my school, we do something called a rainbow cheer.

Is where you put your hands out like this, and we're going to make a rainbow using our hands.

And we make a nice little peaceful sound, like when you see a rainbow, are you ready? So it goes like this.

Can you have a go and do it now.

Great job.

Now it's time to do a quiz.

So if you would like to do your quiz today, you can test how much you have learned about sound, and see what a fantastic scientists you are.

I look forward to seeing you next time, and I can't wait to see what sounds you can hear in the morning, and if they are the same at night time.

See you next time, bye.