Lesson video

Hi everyone.

I'm Miss Harris and welcome to today's science lesson.

We are going to be answering this question.

How can we make and describe different sounds? So, so far, we have looked at volume, pitch, we've looked at making different sounds, high pitch, low pitch, and we have looked at how we make sounds and how our body can remember them.

So we know that our brain remembers the sounds.

In today's lesson we are going to recap what sound is, we are going to look at how we can hear sounds, so recapping again.

We are going to describe some different sounds.

We are going to have a sound experiment.

And then lastly, we've got our end of lesson quiz.

You will need an exercise book and a piece of paper, a pencil, a coloured pencil, and of course your brain.

I've got mine.

Have you got yours? Can you check it's in there? Mine's definitely in there, is yours? Good.

So let's recap.

What is a scientist? Can you remember? Let's have a look.

A scientist is a person who studies the world around us, including living or non-living things.

Now these are our star words.

These are the important words we're going to be using this lesson.

Are you ready? So my turn then your turn.

Sound.

Vibrations.

Pitch.

High pitch.

Low pitch.

Quiet.

Loud, Volume.

Great job.

Now what is sound? Hmm.

Can you take a moment to think? What is sound? Can you remember what it is? So sound is a.

of vibrations that.

through the.

Can you now write this down? What is sound? I'd like you to fill in the gaps to see if you can remember.

If you're stuck, look at the pictures to help you.

Pause the video, have a go at that one.

Fantastic.

Now pick up your coloured pen or pencil so that you can tick or fix.

If you're ticking it, you got it right.

If you're fixing it to worry, that's okay.

We're just fixing it to make sure we've got it right for next time.

So the first one sound is a wave of vibrations that travel through the air, so give you sort of a tick for wave, give yourself a tick for travel and give yourself a tick for air.

If you didn't don't worry.

Pause the video and put a nice, neat line through the word and write at the top.

Wonderful.

Now sounds are made when objects vibrate.

So when it vibrates, it makes a sound.

So the guitar makes a sound.

It then sends an invisible wave into our ears that sends a message to our brain so that we can hear the sound.

It's incredible.

Isn't it? So now what I want you to do is I'm going to give you 30 seconds.

I want you to pause the video in a moment and I would like to see how many sounds you can make with your body.

So I know that I can make this sound.

That's a sound.

Are you ready? I want you to count in your head how many that you can do.

Pause the video and have a go now.

Well done.

How many did you make? Did you make four sounds? More than that? Five sounds? More than that? 10 sounds? You made more than 10 sounds? Wow, well done.

Well done to everyone.

Now, today we are looking at how we can describe sounds.

So how can we describe a sound? We can describe its pitch.

So we can describe the pitch of a sound by focusing on whether it's high pitch or whether it's low pitch.

Can you remember what that means? So remember when we looked at this guitar, a high pitch sound means that something is vibrating really fast because the faster something vibrates, the higher it will be.

We looked at a guitar, and the string, the thinnest string vibrated really, really fast, and it made a high pitched noise, whereas a thicker string like this one makes a lower pitch sound because it vibrates slower.

So how can we describe sounds? We can describe their pitch.

We can also describe the volume of a sound, whether it's loud or quiet.

So the volume of a sound is the loudness of a sound is called it's volume.

Are you ready? I'm going to say it loud.

Make a loud noise ready? Go! Or I can say, go.

I'm whispering a sound which is quiet, or I can say go really loud.

We measured volume using what? Decibels, well done.

We measure sounds using decibels.

Are you ready for a decibel challenge? Are you sure? Okay.

I would like you to look at these decibels.

So we have got, just here, we've got breathing is measured at around 10 decibels.

So it's not super loud at all.

It's measured at 10 decibels.

Whereas a rocket on the other side of that is measured as 180 decibels.

That's so loud! We know the rocket launch is really loud, don't we? Now I would like you to look at these sounds in the red box.

Look at their decibels underneath.

So a bird call is measured at 44 decibels.

Whereas the leaves rustling is 20 decibels.

Can you put them on my line in order from quiet to loudest by looking at the decibels? So remember the higher the number, the louder the sound is.

So it's going to be closer to the rocket.

Pause the video and have a go at that now.

Wonderful.

Should we check our answers? So pick up your coloured pen or pencil.

So breathing comes first, that's measured at 10 decibels, whereas a rocket launch is 180 decibels on the other side.

So I've got breathing.

Then the leaves rustling, which is 20 decibels.

Then bird calls, 44 decibels.

Then the dishwasher, 89 decibels.

And then the motorbike, which is 90 decibels.

So you can see it's going from the quietest to the loudest sound on the other side.

So as I've already mentioned, in the air, when the air vibrates, it sends an invisible sound wave into our ears.

So we can see here, we've got two sound waves.

Can you remember, which is high pitch and which is low pitch? So remember that high pitch sounds vibrate fast whereas a low pitch sound vibrates slow.

Which one do you think is high pitch and which is low pitch? Can you point to the which one? So it sound A high pitch or low pitch? And it sound B high pitch or low pitch? So sound A is high pitch.

You can see there's lots of little sound waves there and sound B is low pitch.

Well done.

Here comes our sound part of it.

I'm going to play you two sounds and I would like you to decide which one is high pitch and which one is low pitch.

Are you ready? So let's listen to the sound of a duck quacking.

Ready? Go.

Okay, not let's listen to the plane taking off.

Is the plane high pitch or low pitch? Ready? Great job.

So which one do you think is high pitch and which is low pitch? So I think that the plane taking off is high pitch.

It made quite a squeaking noise.

Didn't it? A screeching noise? It hurt my ears a little bit.

Now I'm going to play you a triangle sound and a doorbell.

Can you decide which one is high pitch and which is low pitch? Here's the sound of the triangle, listening.

Okay.

Is that high pitch or low pitch? Ready, here's the sound of the doorbell.

Is the doorbell high pitch or low pitch? I think the doorbell was low pitch.

So that means the triangle is high pitch.

Well, great job.

Now, this is where you're going to need to ask an adult in your house if you can do this.

I would like you to get a wooden spoon and a pan, and I'd like you to turn the pan upside down and you're going to bang your spoon on top of the pan.

I'd like you to decide which pans you have make a high pitch sound and which ones make a low pitch sound.

Can you pause the video and go and get two pots that are different sizes and one wooden spoon.

And you're going to bang the top of them to decide which one is high pitch and which one is low pitch.

Pause the video when you go and do that.

Do that now.

Well done.

I found that my pan, the bigger pans made a lower pitch sound.

Whereas the smaller pans made a higher pitch sound.

What did you find? Wow, well done for trying.

Now that comes to our sound experiment for this week.

You will need an exercise book or a piece of paper, a pencil, and of course your ears.

What I would like you to find out, I'd like you to find some sounds which are high pitch and low pitch.

This is how I want you to set it up.

You need to gather your pencil and pen and your paper.

I'd like you to go outside or open a window.

Then you can just sit quietly for a few moments and listen.

I'd like you then to write down what you can hear.

Can you hear the sound of cars? If you can, are they high pitched sounds or low pitch sounds? And write down, are they high pitch or low pitch? That's what I'd like you to do for this week.

And then, if you want to, you can challenge yourself and organise your sounds into loud sounds and quiet sounds if you want to.

That's an extra challenge.

Great.

You've worked so, so hard today, team.

Well done.

Now, if you would like to share your work with us, you can ask your parent or caretaker to take a picture of it and share it on Twitter using the tag OakNational, and the hastag LearnWithOak.

I hope you have a wonderful rest of your day and I will see you next time.