Lesson video

Hi everyone, I'm Miss.

Harris, welcome to today's science lesson.

How are you doing today? Good, I'm glad to hear it.

Are you excited for today's lesson? Me too, now today we are going to be looking at this question, which materials are absorbent? We're going to find out what the word absorb means today, and we're going to be doing an experiment.

Let's see what else we're doing today.

We are going to be looking at properties of materials, identifying materials and properties, looking at what absorbent and waterproof mean, then we're going to be doing our absorbing experiment, and then we're going to be looking at the use of different absorbing materials.

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

If you don't have these things, you can pause the video, go and get them now.

Great, so hopefully you're ready for today's lesson now.

Now, if you have them, you could also find some of these materials for our experiment.

So you can choose, hopefully if you've got these things, either a sponge or a cloth, a plastic bag, or a plastic cup, some tinfoil if you've got it, some cardboard or a piece of paper, some cotton wool or some tissue.

So if you have any of these things and a bowl of water, today, we're going to be talking about whether we're going to investigate which materials are absorbing.

So if you don't have these things, don't worry because I'm going to show you the experiment as well, so we can do it together there.

Let' do our star wars we're going to practise these words, you ready? My turn, then your turn.

Waterproof.

Absorb.

Compare.

Materials.

Absorbent.

Absorb.

Great job.

Now, a scientist is what we are going to be today.

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

So we're going to be investigating non-living things because we're going to look at materials and my pencil, my pen is not a living thing, is it? But we're going to investigate what things are made of.

So let's recap some properties of materials.

Here are some different properties to describe a object, to describe the material the object is made from.

Can you pause the video and tell me what each of these properties are? Okay, so let's check which properties these are.

So we have got soft, hard, absorbing absorbent, waterproof, transparent, opaque.

Then we've got shiny, and lastly, we've got dull.

So if something is dull that means it's not shiny.

Okay, so it's not shiny.

Great job.

So let's now identify some materials and their properties.

So here are two new properties that we haven't talked about before.

We have got stretchy and we have got bendy.

So if something is bendy we can move it around a lot and move the material around.

But if something is stretchy, that means we can put really far like this.

So here are some different materials which we might describe as bendy.

take a look, what objects can you see here? So I can see a rubber band, I can see a scarf, what else can you see? A leather belt good, and in the middle, we have got a metal fence.

Now I put the metal fence on there as well, because we know that when we have a metal, sometimes it's not bending.

But if you heat up a metal, it can become bending if you move it around, but don't try that at home.

Okay, here's a pause point, which material here can we describe as stretchy? So take a closer look, which material can we describe as stretchy? Okay, so which one is stretchy? The rubber band, good job, so the rubber band is stretchy.

Good job.

Now let's take a closer look at absorbing materials and water proof, what does it mean? So if something is the absorbent, that means that it can soak up a liquid, whereas if it got waterproof, it keeps the liquid out.

So absorbent is able to soak up a liquid easily, whereas waterproof means it keeps the water out it stops you from getting wet.

So Miss.

Harris which materials are absorbent? That's what going to find out in today's experiment.

So these are the things that you will need, either a sponge or a cloth, a plastic bag or a plastic cup, some tinfoil, some cardboard or some paper and some cotton wool or some tissue.

And don't worry if you don't have these things, you can watch me do the experiment because I am going to show you shortly in this video.

So if you don't have these things, don't worry, because I'm going to show you.

So now is the time to pause the video, go and get these things and ask your parent or carer if you can get started on the experiment.

You will need a bowl of water as well, and we are going to dip each material into the water to see if the water is soaked up by the material, or if, when we take it out, it's the same as when we put it in the water.

But before we do anything, you will need to draw this table into your books.

So pause the video and draw this table.

So now I have drawn my table, I've included all of the objects and materials at the top that I am going to test in my experiment.

I'm going to put either a tick or a cross in each row to tell me whether it is absorbent or whether it is waterproof.

Well done, now let's read our method.

This is our instructions of what we're going to do.

First, ask your parent or carer if you can use the water to test the absorbency.

Then we're going to make sure that any valuable items are far away so that we're not going to get the wet.

That means our computer, or your laptop, or your tablet, or anything you're watching me on is moved away.

And make sure you're in a space which you don't mind getting wet.

So maybe your desk or where you're sat is not the best idea, maybe you want to do it in the kitchen or in the bathroom where you can get the floor a little bit wet.

Then you're going to pour a very small amount of water onto the object.

And does the material take in the water and absorb it? Or is it's waterproof, and doesn't soak in the water? Now because we're doing it like an experiment, remember that we need to stay safe.

So a scientist needs some of these things to say safe.

Now, today we are only using water for our experiments, so we don't need anything to protect our eyes and our hands, but you might want to wear a lab coat, maybe a white shirt or a white top that you've got in your house so that you can look like a scientist while doing your experiment.

Can you help me put on my lab coat? Could you help me put on my lab coat? Great.

Now to help me put some my lab coat, I'm going to need you to get your hands ready.

So they are really magical.

So just start the magic you can rub your hands together like this, rub them together, are you rubbing? Rub them faster, and then now they're ready.

We're going to do three clicks, like this, ready? 1, 2, 3, and then my lab coat should appear by magic.

So I can start the experiment.

Are you ready, too, you can help me.

Ready, three clicks 3, 2, 1.

And just by not check my lab on.

Thank you very much.

Now I'm ready to start today's experiment.

Don't forget to put your lab coat on 10 too.

Now it's time to begin your experiment.

If you have all the materials you can get started now or you can continue watching to watch me do the experiment.

So I've got all my materials ready, I've got my cloth, I've got my foil, my cup, my tissue, and my cardboard.

I'm going to use a jug of squash for my experiment, just so that we can see it when I pour it onto the material.

So I am going to put the material onto the plate, then I'm going to pour the liquid onto the material.

If there is any water left on the plate, then we know that the material is waterproof.

If there is no liquid left on the plate, then we know that the material has absorbed the liquid.

It has soaked up and taken in the squash.

So let's start with the cloth.

I'm going to pour a little bit, We can see straight away that the liquid has almost disappeared.

Is there any water on the plate? Can you see the squash? No, it's has been soaked up and you can hear it.

It has been soaked up by the cloth.

So the cloth has absorbed the liquid.

So I've just used the cloth in the experiment and we know that it was absorbent, it was not waterproof.

Now let's do the plastic cup, let's pour bit of liquid on that.

I can see straight away that the liquid has poured straight off of the plastic cup.

Has it taken in any of the water? No, it has not.

So the cup, the plastic cup is waterproof.

I've just poured the liquid onto the plastic cup, so now I'm going to put either a tick or cross.

Was it absorbent or was it waterproof? It was waterproof if you're right.

So i get to put to the tick here, I'm going to cross because it was not absorbent.

Now let's do the tinfoil, let's see if the tinfoil is waterproof.

So remember if the liquid is still on the plate, then we know it's water proof.

We can still see the liquid when we poured it on the cloth, it's soaked up straight away didn't it? Is the liquid being soaked up by the tinfoil? No, you can see, look it's running off the material straight away.

So we can see the tinfoil is waterproof.

Now we're moving on to the tinfoil.

Was the tinfoil absorbent, or was it waterproof? It was waterproof, you're right put a tick here, and put a cross in the absorbent because it was not absorbent.

It did not soak up any of the liquid it was left on the plate.

Now let's try the cardboard.

So let's see.

So watching carefully.

I poured a little bit, onto the cardboard.

Mhh, if I tip it up, it looks wet still.

So you can see that the cardboard is still wet, and if I just move it around into the liquid, does that make a difference? You can see, look, the cardboard has absorbed the liquid look, we can see now that it's squishy, it's changed colour, we can see where the squash was poured onto the liquid.

And we can see that there is no liquid left on the plate so the cardboard is not waterproof.

Now the cardboard.

Was the cardboard absorbent, or was it waterproof? So this time it was absorbent so I'm going to put a tick here and it was not waterproof because we saw that the cardboard soaked up the liquid.

And lastly, let's do the tissue, so put the tissue onto the plate, and I'm going to pour the liquid onto it to see if it absorbs any of it.

So you can see straight away, the tissue has soaked up the squash, the liquid, and there is no water left on the plate so we can see here, it's soaked up the water.

If I squeeze it might come out, only a little bit.

So the tissue is not waterproof.

Now the tissue, is tissue absorbent or is tissue waterproof? It's absorbent great, so put a tick here, it was not waterproof because it soaked up the liquid.

Well done.

Did you enjoy watching and or doing that experiment? Great, me too now let's check our results.

So this is what your table might look like because we are ticking whether it was absorbent or we're ticking whether it was waterproof.

So, the cloth or the sponge, so I used the cloth, it was absorbing, it absorbed all of the water that I poured onto it didn't it? Well, most of the water, it was not waterproof.

Then we had the plastic cup, which was waterproof.

Then I used some cardboard.

Do you think it was waterproof? Sorry the tinfoil, was it waterproof? It was waterproof, you're right.

What about the cardboard, was the cardboard waterproof? No, it soaked up some of the water didn't it? And lastly, the tissue, soaked up the water straight away, didn't it? Yeah.

Now your table hopefully looks like mine.

Now we've got a quick pause point.

Which material was the most absorbent? So which ones soaked up the water the most? So I think that the tissue soaked up the water the most didn't it? But then it broke and it didn't last very long did it? So maybe the cloth was the most absorbent because it's soaked up the water and it wasn't breaking like the tissue did.

Now, which material was the least absorbent? So which one was the most waterproof? So you could have said the cardboard or the plastic cup or the plastic bag whichever one you used, because they, both materials were not affected by the water.

Now the use of these absorbent materials, we can use them in our lives so we can use them every day to help us soak up some water.

The first I'd like you to think about why do you think towels need to be absorbent? Pause the video and have a think about that now.

So did you have a think? Why do towels need to be absorbent? That's because when we have a shower or bath, we use the towel to get dry, to dry ourselves, and it absorbs all the water off of our body to make us dry.

That's why we use towels, they need to be absorbing.

Otherwise we would just be getting wet, we'd be rubbing it on us, and we wouldn't be getting any dryer.

What about a sponge? What do you think? Pause the video and have a check now.

So why does sponges need to be absorbent? Because we use them to soak up, lots of may be some washing up liquid when we're doing the washing up, or if we spill something, we might use a sponge to clean it up.

So it soaks up the water for us and helps us with our cleaning or with our tidying up.

And lastly, over two more, not lastly, two more.

Why do you think wellies and umbrellas need to be waterproof? Pause the video and have a think about that now.

So wellies and umbrellas need to be waterproof because otherwise we would get wet when we wore them, or if we held our umbrella up above our head, we might get wet and we use the umbrella to keep us dry, and our wellies to keep our feet dry when we jump in lots of puddles.

Okay, this is the last one.

Why do you think glass needs to be waterproof? Pause the video, have a think about that now.

So here we can see there's glass windows on a car.

If we're driving along and it starts raining, we get very wet, wouldn't we? If the glass wasn't waterproof, or if we were in our house and it started raining the water would come through the glass.

so we need to make sure that the glass is waterproof.

That's why we use glass on windows, so it protects us from the rain or water.

Now it's time for the end of lesson quiz, where you can show off everything that you have learned today.

Now before we go, can you tell me what material is in my background? So this is a tricky one today, you might not know the answer.

So we've got some tyres.

Do you know what tyres are made from? They're made from a material called rubber and tyres once they are made they're quite hard to get rid of, once you have a tyre, they're really hard to recycle and reuse.

So tyres are made from rubber that's in my background today.

Well done.

You have worked super hard today, I am super impressed.

Now it's time to do your quiz don't forget and have a great rest of your day and I'll see you for our next lesson.

Bye.