Lesson video

Hi, everyone, I'm Miss Harris.

Welcome to today's science lesson, where we are going to be answering this question.

How can we describe the pitch of sounds? So let's take a look at what we're going to be learning about today.

We are going to be recapping what sound is, so looking at that definition.

We're going to be looking at how we hear sounds, how our ears and our brain allow us to hear and remember sounds.

What is pitch? Because we want to know how to describe the pitch of sounds.

So we need to know what pitch is.

We're going to look at some vibrations, and how that changes pitch.

And then we're going to be doing a sorting pitch activity where I'm going to play you lots of sounds, and you need to decide whether it's high pitch or low pitch.

For today's lesson, you will need an exercise book or a piece of paper, a pencil, a coloured pen or pencil so you can do some editing, or marking of your work.

And of course you need your brain.

So in this lesson, we are going to be scientists.

Can you remember what a scientist is? So, a scientist is a person who studies the world around us, including the living or non-living things.

Now these words are called Star Words because these are the important words we're going to be saying this lesson and using.

So it's really important that we practise saying them out loud to our screens.

Can you help me with that? Great, so we're going to do something called, "My Turn, Then Your Turn." So my turn, I'm going to say it, then you're going to say it, you have to copy what I say, ready? Sound.

Did you say it, good.

Vibrations.

Pitch.

Volume.

Low.

High.

Messages.

Sound.

Great job.

Now, can you remember what sound is? Have a quick think.

So, sound here if we read this definition, I've left some words out.

Can you follow with your finger, ready? So sound is a mm of vibrations that mm through the mm.

Have a look at the pictures above the gaps where I've left the word out.

In your exercise book, can you pick up your pencil? And I would like you to write the sentence down, filling in the gaps, ready? Pause the video, have a go at that now.

Okay, should we check our answers? So pick up your coloured pen or pencil so that you can mark your work.

So we're going to do something called ticking or fixing.

Tick or fix.

Tick if you got it right, and fix it if you didn't get it right, you're just going to put a neat line through it, and write it on top of the word, okay? So we've got sound is a wave of vibrations that travel through the air, so give yourself a tick if you wrote wave.

Give yourself a tick if you wrote travel or move.

And give yourself a tick if you wrote air, tick.

If you didn't get 'em right, don't worry.

Now is your chance to pick up your coloured pen or pencil.

And I would like you to edit your words.

Put a nice, neat line through it, and write the correct word above it.

Well done.

Now, we had a look at this last lesson where I was telling you all about what sound is and how we're able to hear sounds.

So sounds are made when an object vibrates.

And when it vibrates, it vibrates the air around it.

And that sends invisible waves into our ears, which then send messages to our brains so that we can remember it.

It looks like this.

So, a guitar makes a sound if I strum the string on the guitar, that's going to vibrate like this.

It sends invisible waves through the air, vibrates the air.

That goes into our ears and it sends tiny messages to our brain to help us remember the sound.

So we're going to look at something called pitch today.

Can you say that word, pitch? Pitch, can you whisper it? Pitch.

Can you say it like a robot? Pitch.

Good job.

So sounds are low and some are high, this is called pitch.

The faster something vibrates the object, the faster it vibrates, the higher the sound will be.

So if we take a look at this guitar, this picture here, look carefully at the strings.

Are they all the same size? Are they as thick as each other? So, no, they're not, because an example of this is if we look at this guitar's strings, we can see the ones on this side are thinner.

And the ones on the other side are thicker.

The thicker the strings are, the slower they will vibrate.

And the thinner they are, the faster they will vibrate.

This is how we right make pitch.

So take a look here at this string, it's really thin.

So it's going to vibrate so much faster, and the sound is going to have a higher pitch.

Let's take a look at a guitar and listen to the sound of a high pitch if I strum the really thin string, ready? So that was the sound of a high-pitch sound because the string was vibrating so much faster.

Now we're going to look at something called low pitch, where the sound is really low like this.

Some sounds are low and some are high.

The slower the string vibrates, the object vibrates, the lower the pitch.

So take a look here.

Here you can see the guitar string is much thicker.

You almost can't see the one on this side because it's really thin.

But the one on the other side has a thicker string.

The thicker the string is, it vibrates slower.

And this makes a low-pitch sound.

Let's take a look at a guitar and listen to the low-pitch sound.

Great, so that was a low-pitch sound.

Now here are two sound waves.

But these are usually invisible.

So when we strum the guitar string, that invisible wave travels through the air, and it goes into our ears.

The faster the vibration, the higher the pitch.

So there's going to be more waves the higher the pitch.

And there's going to be less waves because the vibration is going to be slower, so it's going to be nice, slow waves like this.

Whereas when it's high pitch, it's going to be really fast.

So in your books, I would like you to draw a picture of these two sound waves.

And I would like you to decide whether sound wave A is low pitch or high pitch.

And whether sound wave B is high pitch or low pitch.

So you need to decide which one is low and which one is high.

So you're going to need to write that down in your book and draw the sound waves, okay? Do you think you can do that? I know you can because you are fantastic.

So pause the video and have a go at deciding which one is high pitch, which one is low pitch.

Well done, so pick up your coloured pen or pencil.

Have you got it? Good, so we're going to tick or fix, remember, just like we did last time.

So sound A is low pitch because there are less waves, because there are slower vibrations.

And sound wave B is high pitch because there are more vibrations because it vibrates faster.

So it creates a high pitch.

So now I am going to play you two sounds.

And you need to decide which is high pitch and which is low pitch.

Do you think you can do that? Great, so you can say it out loud or you can write it down.

It's up to you.

So here is the first sound, blowing a whistle.

Listen carefully.

Okay, now here is the sound of a tiger roar.

Is this high pitch or low pitch? Well done, so which one is high, which one is low? Can you tell your screen? So blowing a whistle is? High or low? High pitch, well done.

And that means that a tiger roar must be low pitch, great job.

Are you ready for the next one? So now we've got a bird chirping or tweeting, and a car engine.

Which one is high pitch? Which one is low pitch.

Are you ready? Here is the bird chirping sound.

Okay, now here is the engine sound.

Remember, is it high pitch or low pitch? Well done.

So, which one is high pitch? The bird tweeting or the car engine? And which one is low pitch? Remember, one is going to be high pitch, one is going to be low pitch.

Which one do you think? So the bird tweeting, the bird tweeting is high pitch.

And the car engine is low pitch.

It makes a much lower-pitch sound, doesn't it? Okay, here's the next one.

We have got a dog barking or a fire alarm? Which one is high pitch? Which one is low pitch? So listening to the dog barking first, is it high or is it low pitch? Well done, now the fire alarm.

High pitch or low pitch? Listening.

Great job, so the dog barking or the fire alarm? Which one is high pitch, which one is low pitch? You tell your screen.

So the dog barking is low pitch and the fire alarm is high pitch, well done, great job.

Now that brings us to the end of today's lesson.

You have learned so much about pitch today, so well done.

So we can describe pitch as being high pitch or being low pitch.

Maybe you can listen out to some sounds in your house today or around you.

Maybe when you go for a walk, and you can listen to whether the sounds are high pitch or low pitch.

If you want to share a picture of your work, you can ask your parent or carer to share it on Twitter using the tag OakNational, or the hashtag ONA year one.

I hope you have a lovely rest of your day, and I will see you next time, bye.