Lesson video

Hi everyone, really nice to see you.

How are you today? Great, I'm really excited to be teaching you this lesson.

My name is Miss Emms and today we're going to be learning all about mixtures.

Now this is the third lesson in this science unit.

Hopefully you've had a look at our first lesson on solids liquids and gases and the second lesson on what happens when you heat a solid object.

And this is the third lesson, let's see what we're going to be doing.

So in today's lesson, we are going to be answering this key question, which mixture makes the best bubbles? And you are learning with me, Miss Emms. So first things first, we're going to go over our star words then we'll have a look at some recap questions and then we're going to think about the question, what is a mixture? After that it'll be time for an investigation and some observations.

And finally an end of lesson quiz.

You're going to need a few things in this lesson.

You'll need an exercise book or paper, you'll need a pencil, you will need your science brain ready to go.

And if you've got them, you're also going to need.

It's not time for star words yet.

If you've got them, later on in the last I will explain then you're going to need to use some water and some soap.

But don't worry about getting that now, I'm going to explain that in depth later on in the lesson.

So for the moment, just pause the video to go and get your exercise book or paper or pencil and that's it.

Pause now.

Fantastic, we're ready.

So, let's have a look at our star words.

Ready? Star word, star words, star words.

Amazing.

Mixture.

We're going to learn more to mixture is in today's lesson.

Mixture, substance.

Bubbles, you've probably heard that word before and conclusion.

At the end of the lesson, we're going to write a conclusion.

So we're going to learn what a mixture is, we're going to learn what the substance is and we're going to have a think about how to create bubbles.

So, a quick recap.

What happens when you apply heat to a solid? Can you tell your screen when you apply heat to a solid, the solid, tell your screen.

Right.

When you apply heat to a solid, the solid becomes a liquid.

It changes state, it melts.

You might have said any of those things.

And if you want to describe what happens to the particles, they move faster, they break apart and they get further apart from each other.

So that's the solid changes state and becomes a liquid.

think about what it means if we say the word mixture.

What is a mixture? A mixture is when two or more substances, remember that was one of our star words.

So two or more things, substances are mixed together.

So not just one, two or more.

Two or three or four or any number more than two, when those two substances or more are mixed together, that creates what we call a mixture.

That creates a? Amazing, so a mixture is when two or more substances are mixed together.

Your turn, a mixture is when two or more substances are mixed together.

Amazing.

Okay.

So, this is a mixture that you might be quite familiar with if you ever have a glass of orange squash.

Orange squash is a mixture, it's made from water and orange squash.

Okay, the squash that you put inside it.

So that creates a mixture which is a glass of orange squash.

Or for example, if you have a bath or if you're making a sink of soapy water to wash some things up you will use soap, you'll use water and soap or perhaps bubble bath.

So that water with the soap or bubble bath becomes what we call a mixture because there are two substances mixed together.

And another one that you might be familiar with, cereal and milk.

Together they become a mixture because we've got the cereal and we've got the milk.

and if you mix them together, it becomes a mixture.

Two or more substances mixed together.

So, now we're going to have a think about an investigation.

Before we start, there are some things that's really important.

You need to ask your parents or carer if you can use soaps and water to make mixtures for your science lesson that you're doing now.

Don't just do it without asking permission.

Do the investigation somewhere where it's okay to get a bit messy.

For example, in the bathroom.

I've done mine in front of this screen so that you can see.

Mine hasn't got really, very messy.

But if you wanted to experiment with different kinds of soaps and different amounts of water, it might be useful to do it in a bathroom where you've got some space and things aren't going to get really messy.

And if there is anything that you don't want to get wet, make sure that you cover or move anything that you don't want to get wet, okay? So in the investigation, you're going to be using water as one part of your mixture and the kind of soap as the other parts of your mixture.

Now the soap that you might want to use can be different.

You're going to see if it makes a difference If you use.

If it makes a difference to the bubbles, if you use a different kind of soap or if you change the amount of that soap that you use.

So you could use soap, you could use washing up liquid as I'm going to do.

You could use bubble bath, so the soap that you use to make your bath really bubbly or you could use shampoo.

You could use any of these types of soaps, these substances to create your mixture.

So, You're also going to use, you will use those substances and you're going to use water.

Now the water that you use does not have to be a certain temperature, I used warm water.

It could be water or room temperature water.

You're going to need to get your water from a tap and you're going to have to put it into a container like you'll see me doing a minute.

And together, these things are going to create a mixture.

Because remember, a mixture is where you've got two or more substances mixed together to create that mixture.

So in this situation, it's going to be one of these soaps and water.

So, the question we're going to try and answer is which mixture makes the best bubbles.

Okay, and I'm going to teach you how to do that when I do my investigation and you're going to try and find out which mixture makes the best bubbles.

You could experiment with different kinds of soap or you could also experiment with different amounts of soap.

So if you just want to use one type of soap, then perhaps you could at first use a little bit and then use lots and see if that makes a difference to the bubbles or you could make a mixture with soap, with hand soap.

You could then make a mixture with washing up liquid and then with bubble bath and then with shampoo and see which one makes the most amount of bubbles, okay? If you only have one kind of soap, you can just experiment with different amounts of that soap straight away.

Okay, it's time to watch me have a go, so make sure you're looking really carefully, make sure you're listening carefully and make sure you're making observations about my investigation.

Okay, everyone.

So, what I'm going to do is I'm going to have a go at creating a mixture which produces great bubbles.

And I'm going to show you how to do that so you can have a go at the investigation by yourself.

So what I've got is I've got a container I'm going to use to create the mixture.

I've got a jug that's full of warm water.

My water's warm, it shouldn't be really, really hot.

It can be any temperature, it can be room temperature water if that's what you'd like to use.

Mines just from the warm tap and I've got some soap.

So this is the soap that I would use to wash my dishes after I've eaten a meal.

So that's the soap that I am going to use.

So I've got those three things that are ready to make my mixture.

So what I'm going to do is I'm going to pour some of the, I'm going to pour some of the water into my container like this.

Okay, I'm going to pour quite a lot of it in.

So you can see that it's almost about half full.

And the next thing I'm going to do is I'm going to pour in a little bit of my soap.

Okay.

I'm not going to put all of it in yet 'cause I'm going to see if using more helps me to create a mixture which produces more bubbles.

And now using my hands, I'm just going to use my hands.

I'm going to dry my hand off a bit, I've made sure that I haven't got anything valuable around me that could get wet.

I'm going to mix it with my hands like this.

And you can see already that the mixture, so it's sort of a light green colour because one of the parts of my mixture is dark green.

And you can see that it starts changing into a light green colour and it's become really soapy and really bubbly, okay.

So I have already created a mixture.

Two parts went into the mixture, so I have water and had the soap and now it's made a mixture because there are two parts involved in this mixture.

And what I'm going to do is I'm going to have a go at creating a bubble.

So in order to do this, I'm going to put my hands into the mixture already making a shape like this, so this part is closed here.

Okay, so already like this with this part closed and I'm going to put it in.

So I made one bubble.

So I'm putting my hand in like this and then you can see another bubble.

It's hard to see on the screen but I'm able to make up bubbles by putting my hand in and then the film is there.

And if I blow through then the bubble comes up.

Let me have another go.

So I want to make a circle shape here and put that into the mixture.

Give it a little mix, pull it out slowly.

I need to check that there's a film, sort of a layer there.

That was a good one, and then I can have a go at creating the bubbles.

Let me do it again, see if I can create a slightly smaller one now.

Wow, that was a big one.

So, you all going to have a go by getting your warm water or your room temperature water, a container in which you're going to do it and then your soap that you're going to use.

I wonder if you can have a play around, see if you add more soap, is it going to create a mixture that produces bigger bubbles.

Shall we see if I add more soap, and now I'm going to mix it around again with my hand.

All right, feels really soapy now and it's gone even darker green.

And then I put my hand in with my circle like this.

That was a bubble straight away, wasn't quite as big as the one I produced before.

That was a really good bubble, I'm going to do one more.

I'm going to try and move my other finger out of the way so that I can blow the bubble.

There we go.

See if we can do it again.

Okay, let's do one more.

Maybe if you rub your hands together, you're going to give me luck to blow a nice big bubble.

Oh, that was a great one.

Okay everyone, I hope have fun.

Make sure that you're being safe, make sure you've asked permission to have a go at this experiment and make sure you've got your water, your soap and a container in which you do it in.

Remember to put your hand in, left.

Remember to put your hands in, so you're going to make a circle shape like that, put your hand in and then check that here there's a thin sort of shiny film You're going to blow the bubble from behind like this, okay? Okay.

I hope can enjoyed watching that, it's your turn now but before you start remember, ask your parents or carer for permission.

Do it somewhere where it's okay to get a bit messy, for example in the bathroom.

Don't wet clothes that you don't want to get wet and cover or move anything that you don't want to get wet.

Off you go.

Pause the video now and go and do your investigation.

Off you go.

Wait, sorry miss.

I soared to the slide for the conclusion before it was your turn to do the conclusion.

But now that you've done the investigation, as scientists it's really important that we think carefully about what we found and that we write about that in a conclusion.

A conclusion is something that when we sum up our findings from the investigation.

I want you to write the following conclusion but you're going to have to do the thinking about filling in these gaps.

So, you're going to write the title conclusion and you're going to write, I found that the mixture which made the best bubbles was.

And then you're going to say which one it was.

It could have been different for you, maybe it was when you used and washing up liquid or hand soap.

Maybe it was when you used shampoo, whatever you found.

Then you're going to say it made the best bubbles because and you're going to say, perhaps you'll say, because I used lots of washing up liquid or I used lots of hand soap or it made the best bubbles because the other soaps did not produce bubbles as big as this one, okay? And then you're going to say, I could make even bigger bubbles by.

How could you make even bigger bubbles? Was it by perhaps making a larger circle that you could blow the bubble from, adding more soap? Whatever you found in your investigation.

So pause the video now to write your conclusion.

Good luck.

Okay, Well done everyone for writing such a great conclusion.

I know it's going to be time for your end of lesson quiz after this video.

You've done such an amazing job today, I hope you've had fun and I hope you've learned lots.

I will see you next time.

Shall we do a quick awesome cheer for our really hard work today? Three, two, one.

Awesome.

Well done everyone, bye.