Lesson video

Hi everyone.

I'm Miss Harris, what's your name? Lovely to meet you.

Are you ready for today Science lesson? Great.

Me too.

Today, we are going to be looking at which materials can withstand a strong wind.

That means which ones won't get blown away by a really powerful wind, because next lesson we're going to be using a hairdryer.

Yes.

I said a hairdryer to create our own wind, to see if the walls that we create today will be able to survive and stay standing and not blow away.

Let's find out what else we're going to be doing.

We are going to be looking at star words, the important ones in today's lesson.

Comparing the words, heavy and light, and what they mean.

We're going to be looking at which materials are heavier and which are lighter.

I'm going to be using a set of scales to show you.

We're going to look at what materials we're going to use to build some mini walls today for our experiment.

And then we're going to complete the experiment by creating our walls.

Today, you will need an exercise book, a pencil, a coloured pencil, and your brain.

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

Now, as I mentioned, you will need some of these things.

We're going to create our own mini wall to see which material will survive a strong wind that we are going to create with our hairdryer next lesson.

So if you have any of these things in your home, you can go and get them now so that you are ready to create your mini wall later on in today's lesson.

If you don't have any of these things, don't worry because I'm going to do the experiment too.

And you can watch me.

So if you have any these things, pause the video and go get them now.

Great.

Well done.

So let's do, I'll start with, so it's going to be my turn, then your turn, you ready? Design, model, leaves, cotton, wood, heavy, light, heavy.

Can you do that? Heavy, light, heavy, light, good job.

Now, remember that I read a story to you in lesson one and lesson two.

And we heard all about some children who went to the rainforest and they were given a task by their teacher to create some walls.

Now they were able to choose the materials that they needed to build a wall, to see whether it was strong enough to build an entire classroom.

Some of the materials they used they got very wet in the rain.

In the rain forest, it doesn't just rain.

It's also quite windy.

So we're going to create some walls today so that when we have less than full, we can look at whether the wind that we create using the wall and see whether it gets blown away.

So we want to see whether it's strong.

Okay? So let's think about whether the materials are heavy and light.

Because if the material is really heavy, it won't get blown away, easily in the wind.

But if it's light, it will get blown away quite easily.

So if something is heavy, it describes an object which is hard to lift and move.

So a car is really heavy.

We wouldn't be able to just pick it up and move, unless you were super, super strong.

So don't try it.

Cause you might hurt yourself.

Now, an object which is light is something which is easy to lift and move.

My pen is really light, I can pick it up and move it, but my table, oh, it's quite heavy.

So I can't lift and move it easily.

Now take a look.

Do you think our wall needs to be heavy or light.

So do you think an actual wall that we could build a real one.

Do you think it needs to be heavy or light? Pause the video, answer the question and then press play.

So do you think it needs to be heavy or light? It needs to be heavy.

It needs to be strong, sturdy, hard, and also waterproof, which we learned last lesson, because we don't want it to be able to blow away.

Do we? So we need a material that is strong, steady, hard, heavy, and waterproof.

So we know that our wall needs to be heavy, but we are not going to see whether heavy materials are also strong because sometimes wind can even break materials, which are heavy and strong.

So wind can be really powerful.

It can even blow down trees.

So we need to make sure that although our material is heavy, it's also strong.

So it doesn't get broken by the wind.

So which materials are heavier.

I'm going to be showing you these materials here.

So I have got glass, some plastic bricks, some straw, some playdough, some wooden twigs and some paper.

We are going to compare the different materials to see what is heavier.

So remember, I am using a small amount of these objects.

If I was using more, they might be described as heavier.

So if I was using a hundred pieces of paper compared to one plastic Lego brick, the piece of paper would definitely be heavier.

Wouldn't they? So just remember I'm using small amounts.

So I have a balancing scale and I'm going to put one material in one side, one on the other side, we're going to see which one's heavier.

The heavier material will drop down and the lighter one will lift up because remember, lighter materials are easier to lift.

So I want you to get ready to shout, mm is heavier than mm.

Okay? So let's take a look at the weighing scales.

Let's see which of these materials are heavy and which are not.

So you can see that my scale at the moment is balanced.

It's equal on both sides.

So the arrow here is pointing directly to this arrow.

Pose to push down on the side you can see, you can see that it moves down like this.

So we can see that it's no longer equal.

This side is heavier because I'm pushing down on it.

I'm making force.

Whereas this side is going up, so it's lighter.

So remember if it goes down, it's heavier.

If it goes up, it's lighter.

so first let's look at the plastic bricks that I've got here.

Some Lego, let's put that in the pot.

So you can see already, because there's nothing in here, this side is heavier.

Then we're going to do some straw.

Let's compare the straw with plastic bricks, okay.

Which is heavier, the straw or the plastic bricks? So the mm is heavier.

Can you shout it out? The plastic bricks are heavier.

You're right, now, which one is lighter? The straw is lighter than the plastic bricks.

Well done, Okay.

Let's take that out.

Now, let's compel it not to dance.

Let's look at the glass this time.

And the paper, just fold it so it fits Which one is heavier? Mm is heavier.

The glass is heavier.

Well done.

Now can you tell me which material is lighter? Or the lightest? The paper is the lightest, well done.

Can you put in a full sentence now? The mm is heavier than the mm.

The glass is heavier than the paper.

Well done.

Now let's try the Playdough and the wood.

So here's my Playdough, then am going to put my sticks here too.

Okay.

Which material is heavier? The Playdough or the sticks of wood? You're right.

The Playdough is heavier than the sticks of wood.

Can you put it in a full sentence.

That mm is heavier than the mm.

The Playdough is heavier than the sticks.

Wood, Well done.

you're working really hard.

So we've just seen which materials are heavier and lighter.

Now we're going to do a true or false now to see whether you are listening really carefully and watching.

Are you ready? So which materials were heavier? Identify which is true or false.

So here's the first one.

Plastic is heavier than straw.

Is that true or is it false? Now point to the right answer? True or false? It's true.

Plastic is heavier than straw.

Well done.

Get ready for the next one? Number two, the glass is lighter than Paper.

Is that true or is that false? It's false? The glass is not lighter than the paper.

The glass was heavier than the paper.

Wasn't it? And the last one, Playdough is heavier than wood.

True or false? point to the right answer.

It was true.

The Playdough that we used was heavier than the tweaks that I had.

Wasn't it? well done.

Now in your books, I would like you to draw one line down the middle of your page and at the top, write, heavy on one side and the other side, write the word light, which you can see here.

You are then going to sort the materials into heavy and light.

So I've done the first one for you.

I've drawn a picture of the glass and I've written glass because glass is a heavier material.

Isn't it? I want you to do that for the rest of the materials, by drawing the picture and then writing the word, whether it's light or whether it was heavy.

Pause the video and do that now.

Well done.

Now we're going to look at the different materials we would need to complete today's experiment.

So if you have them, you could find, playdough, hay or straw, So not both just one, twigs or lolly sticks.

So again, just one.

Sugar cubes, plastic bricks, and then glue or sticky tape so that you can secure it together.

So if you have any of these things, even if you just have one, that's great because you can keep it safe for next lesson.

So we're going to build a mini wall.

We're going to keep them safe.

Put them aside, ready for next lesson, for lesson five.

Okay.

So you are going to gather your materials.

So choose the thing that you're going to use.

Build your wall, using each groups.

Remember, if you've got twigs and lolly sticks, you're not doing both, you're just doing one.

secure your wall with sticky table glue.

So you use it to stick it all together.

Keep your wall safe for less than five.

So remember we're not doing the experiment today.

We're going to keep all of our resources, our little walls safe.

If you're joining in, otherwise you're going to watch me.

Now, even if you're not doing today's experiment, I would like you to put on some safety wear.

So if you've got some gloves or some goggles, or a white shirt or jacket, can you put these on so that you can be a scientist with me while I do my experiment, while I build the walls, Do you think you could do that? Pause the video and go and get a lab coat so that you could be a scientist with me.

Okay.

Now I need help putting on my lab coat.

Do you think you can help me?Great.

Do you think you can help me put on my lab coat? you can, great, are you ready? Let's get the magic powder.

Rub your hands together.

Everybody do this, and stop.

Okay.

We are going to do click, click, click.

So we are going to do three and on the third one, my lab coat, wait a bit.

So I forgot it was called.

Are you ready? Three, two, one.

Again, you've help put my lab coat on.

Thank you so much.

Now I'm ready to start today's experiment, thank you.

So now I've got my lab coat on, I'm ready.

So that I'm protected while I'm completing the experiment today.

And you're also ready to complete the experiment or watch me do it.

So, now it's time to begin the experiment, building your wall.

If you have the materials or you're going to continue watching to see me do it? Here you can see that I have chosen my materials from each group.

So I've got Playdough, straw, wooden lolly sticks, sugar cubes, and plastic bricks.

And you can see here Lego, so Lego.

I've then got some glue and some sellotape to help me stick my materials together so that I can build a wall using each material.

I'm going to start by using the Playdough to make a wall.

So there is my first wall using my playdough.

I've made it as tall as I can.

And that is now ready to keep nice and safe for next lesson.

I'm now going to make a wall using straw.

I'm going to use some sellotape to help me stick them together.

You can see that I've used the sellotape to combine my materials into a wall shape.

okay.

I'm now going to build a wall using some lolly sticks.

I'm going to use some glue this time to secure them to get.

So now I have built my wall using lolly sticks.

I've got lots of spare leftover, so I'm just going to put them to one side.

So I've got my lolly stick wall all built.

Now it's time to do my sugar cube wall.

So there is my sugar cube wall all built.

And lastly, I'm going to build my wall using Lego.

And this is my Lego wall all built.

So now I've got all of my walls built.

I'm going to keep them safe so that I've got them for next lesson.

When we conduct our experiment.

Now, remember you don't have to do all of the walls.

Even if you have one material, that's still good because you can still participate in the experiment.

If not, don't worry.

If you don't have any of these things, don't worry because you can watch me do the experiment next week.

Well done, you worked really hard today.

Looking at whether materials are heavy or light.

I want you to remember that for next lesson.

You might already think which materials will be able to survive the wind that we are going to create.

Now it's time to do end of lesson quiz, where you can show off everything that you have learned today about heavy and light materials.

You've worked super duper hot today.

Fantastic effort.

Well done.

Should we do a special chair? Should we do something called a rainbow tea? Ready? See, you need to hold your hands out like this.

And we're going to make a rainbow like this.

Do you think you can do that? So hold your hands up.

Ready? 3, 2, 1.

Good job.

I'll see you next time.

Bye.