Lesson video

Hi everyone, I'm Miss Harris.

Welcome to today's science lesson.

How are you doing today? Great.

I hope you're having a great day so far.

Now we are on our last lesson of our building things unit and today we are looking at, what is a mixture.

We're going to find out by exploring lots of different substances that create a different mixture.

Let's find out what else we'll be doing today.

So we're going to do a star words.

Look at what a mixture is, look at examples of some mixtures, look at strong mixtures, and then we've got our experiment at the end.

For today's lesson, you will need an exercise book, a pencil and coloured pencil and your brain.

If you need to go and get these things, pause the video and go and get them now.

Great.

So for our experiment towards the end of the lesson, if you would like to take part, you will need some shampoo or some soap, some water, a cloth or a towel, preferably an old towel, because we're going to be putting lots of soap onto it today.

So if you want to join in that experiment, that is what you will need later on.

Let's do out star words.

Mixture.

Substance.

Strong.

Build.

Conclusion.

Well done.

So over the last few weeks we've been investigating different materials to build a wall.

We've explored which materials are appropriate for our wall and we've looked at whether the materials can survive in the rain or if they can survive in the wind.

So for all of our experiments, we have used sticky tape or glue to secure our materials together.

Today, we will be finding out what mixtures are used to secure buildings.

So what mixtures do we use to help our buildings stay up nice and tall and do not fall down? So first, let's look at, what is a mixture? A mixture is made by combining two or more substances together.

So a mixture is made by combining, that means mixing together, combining two or more substances together.

Can you remember that? What is a mixture? A is made by combining or more substances.

Can you write that down in your book and fill in the gaps? Well done.

Let's check our answers, so now pick up your coloured pen or pencil.

A mixture, give yourself a tick if you wrote mixture, is made by combining two or more substances together.

Give yourself a tick if you wrote two and give yourself a tick if you wrote, together.

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

Put a nice, neat line through the word that you got wrong and write it above in your coloured pen.

Pause the video and check it now.

Well done.

So now let's take a look at some examples of different mixtures that you might know.

The first one is orange squash and water mixed together makes orange juice.

So maybe you've got some orange juice, some orange squash in your cupboard and when you mix it with water, you have a lovely, cool orange juice drink.

So that's an example of one mixture.

Another one is you might have, a grownup might have some coffee grounds and they mix it with some hot water and they are then able to make a coffee.

So that's another example of a mixture that they might use.

Let's take a look at the next one.

We have got cereal and makes breakfast cereal.

What do we mix with cereal before we eat it? In your books, I would like you to draw this mixture and fill in the gap by drawing the picture and labelling what we need to mix with cereal so that we have a bowl of breakfast cereal.

So pause the video and do that now.

So to make a breakfast cereal, so a mixture, we need to add milk.

So add cereal and milk, make a breakfast cereal.

So that's another example of a mixture that you might have.

Now, let's have a look at some really strong mixtures.

Strong mixtures are used to help build buildings, to secure the materials together so they don't fall down.

So when Ms. Harris made a sugar cube wall, for example, you watched me put the glue on top of the bricks and then stack them on top.

That's what happens with bricks when we build a house or a building.

We could mix sand and gravel and water and that makes cement.

Now, cement is a really strong mixture.

Once it's dry, it's used between bricks to build a house.

So maybe you're in a house now or you're in a flat, can you have a look out of the window? And I want you to go and see if you can see a brick building.

So look at the bricks and can you see almost like a white line between all the bricks? That's cement.

Can you go have a look? So pause the video and go and look now.

Could you see some? Don't worry if you couldn't, next time when you go out, maybe you can have a look to see if you can see cement between the bricks.

Now it's time for the fun part of today's lesson.

We are going to find out what mixture is made, what we can create by mixing soap and water together.

So we're going to find out what soap and water create.

For this you will need soap and water or shampoo, you can use that too, a towel or a cloth.

So if you have any of these things and you want to take part today, you can pause the video and go and get them now.

So before we start, this is the important part.

You need to ask your parent or carer if you can have some soap and a towel.

You're going to do your investigation somewhere where it's okay to get a bit messy.

You could use the bathroom, for example.

I want you to cover and move anything that you don't want to get wet.

So go and check this now.

Okay, hopefully now you've asked your parent or carer, you've got some space and you've moved anything that you don't want to get wet.

So for the investigation, you are going to lay your towel out on a table.

You're going to wet just a little bit of your towel, not your whole towel or cloth, just a little circle.

You're then going to rub the shampoo or the soap onto the wet part of your towel.

You're then going to hold up your towel on the non-soapy side.

So if I rubbed it on to the towel, I'm going to turn it the other way.

I'm going to put the not soapy side up to my mouth and I'm going to hold it away.

I'm going to go like this.

And I'm going to blow into the cloth or the towel.

Remember not to breathe in, like that, when it's next to your face, because you will breathe in the soap and that won't be very nice.

So hold it away, breathe in, put it close and breathe out.

Then you will find out what is made.

So before we get started as well, we need some safety equipment.

So you could use some gloves or some goggles if you want, because we're going to be holding something up to our face, but you might want a lab coat to protect yourself from the water and the soap.

So if you have a white shirt or a jacket or something that's white, you could go and put it on so you're ready for the experiment.

Pause the video and go and do that now.

Do you think you can help me put my lab coat on? I heard that you're really good at helping scientists like me put on their lab coats.

Do you think you can help? Great.

Can you help me put some of my lab coat? Great, so let's rubs our hands together, ready, let's get the magic.

Start rubbing together both hands really fast.

Right, now don't touch anything, 'cause the magic will go away.

Should we do one extra rub just to make sure? Okay, we're going to do one big blow like we did last time, so we're going to go like this.

And push all of that magic towards Ms. Harris.

Okay, are you ready? Three, two, one, big blow.

And now I'm ready to do today's experiment.

Thank you so much for helping me put on my lab coat.

Thanks for helping me put on my lab coat, now I'm ready.

Now it's time to begin the experiment if you're taking part.

If you're not, you can continue watching to see me do it.

Remember, we want to find out what is made in the mixture.

So I have got my soap.

I have got my jug of water and I've got a cloth.

So what we are going to do is remember, first we are going to pour a little bit of water onto the cloth.

You can see there, some on that.

Okay, then we're going to put a little of soap onto our cloth and we're going to rub it in.

Make sure it's all rubbed in on the wet area of the cloth.

Is it all rubbed in? Yeah, I think so.

So I'm going to wipe my hand there.

I'm going to blow into the non-soapy side, so the side that I didn't put the soap onto.

Ready? So I'm going to take a deep breath away from the cloth.

What has happened to the cloth? What can we see? Lots of what? Keep it in your head.

We're going to talk about in a moment.

Can you create more of these than me? Well done for completing today's experiment or for watching me do it.

Now let's have a think.

Soap and water, what mixture did it create? What did the soap and water create? It created bubbles.

Did you get that right? So it created lots of bubbles, didn't it? When we blew into the cloth and we made bubbles.

So soap and water mixed together, make bubbles.

Well done for working so hard today to find out what our mixture was going to create.

You've worked really, really hard in this unit of work and if you would like to share your work with us, you can ask your parent or carer to share a picture of any of your work on Twitter, Instagram or Facebook using the tag OakNational and the #LearnwithOak.

We would love to see all of the wonderful work that you've created over the last few weeks.

I've really enjoyed teaching you and I hope that you've enjoyed this unit of work with building things.

I'll see you next time, have a great day.

Bye.