Lesson video

Hi everyone, it's really nice to see you.

I hope you're feeling ready and excited for a science lesson with me Miss Emms. I'm feeling really pleased to be here and I'm really looking forward to teaching you this lesson.

Hopefully, you've had a chance to look at lessons one, two and three of this unit, because this one is lesson four.

So those three lessons will help you so that you're ready for the content of this lesson.

Let's go straight to our slideshow, so you can see exactly what we're going to be doing.

Okay, there we go.

In today's lesson, our key question is which materials are absorbent? And very soon, you're going to hit a definition of the word absorbent, and you are with me, Miss Emms. So, fast things fast, we're going to go over our star words so important words that you're going to need in the lesson.

And now we going to have a think about some recap questions.

So questions based on our lessons three, title, which materials were the stretches and had the highest elasticity.

Then we're going to move on to thinking about absorbent materials.

And finally, you will watch me do a bit of an investigation, and if you've got the materials yourself and if you've asked permission from your parents or carer, you will be able to join in an investigation as well.

And finally, you will complete an end of lesson quiz.

Okay, so you're going to need a couple of things in this lesson.

First, you're going to need an exercise book or paper, you're going to need a pencil and you're going to need your science brain switched on and ready to do lots of break learning.

Can you give your brain a little rub so it's ready? Amazing.

And in this lesson you might need some other things too.

So let me show you what else you could get if you've got these things where you are.

So, as well as your exercise book or paper and your pencil, if you'd like to join in in the investigation, you could find these items as well.

So, a cloth or a sponge.

So I've just got a cloth like this, but you could find a sponge if you've got one.

A plastic bag or plastic cups.

So I've got both, I got a plastic cup and I've got a plastic bag, some foils and some cardboard or paper, and some cotton wool, okay? So I've got these cotton wool pads or it could be fluffy cotton, well, if you've got that as well.

Now you don't need to find all of these things, you might have all of them, you might only have a few, or you might not have any and you want to watch the investigation instead.

But if you have got these things where you are, can you pause the video now, don't forget your exercise book and your pencil as well, can you go and get everything you need to be ready for this lesson? Pause now.

Okay, fantastic, we are ready, let's start.

So, let's have a look at our star words, our important words that we need to define, so that we can use them in the lesson, are you ready? Star word, star word, star words, amazing.

Absorbent.

If a material is absorbent, it's easily soaks up liquid, okay? So we're going to think about which materials are absorbent.

Let's say it again, absorbent.

Well done.

Waterproof, waterproof.

And in lesson one of this unit, we thought carefully about the difference between absorbent and waterproof.

So rule to proof means it keeps water out, so, it repels the water.

Next one, absorb, absorb.

Absorbs means to soak in, okay? Or to take in, absorb.

And compare, compare.

So we are going to compare how absorbent different materials are.

And finally, one of our other key words really important, materials, your turn, materials.

So we're thinking about different materials today.

In lesson one, we looked carefully at the difference between an object and a material.

So for example, here, the object is a cup the material it's made of is plastic, okay? All right, let's make a start.

Okay, a quick recap now.

So, in lesson three, we looked at elasticity.

Can you say the key word, elasticity.

Elasticity is how elastic and material is.

So how easily you can stretch a material and then that material can return to its original shape.

So we found out that an elastic band had a very high elasticity.

If you stretched the elastic band, it would easily return to its original shape, okay? We also looked at a sock and I was able to stretch the sock and it did return to its original shape, but it wasn't as elastic as the elastic band.

Now we're going to have a think about absorbent materials.

So moving on from stretchy or elastic materials in lessons three, today we're thinking about a different property.

We're thinking about materials that are absorbent.

So, absorbent means able to soak up a liquid easily, okay? So we're thinking about absorbent materials, which are sort of the opposite of waterproof materials.

So waterproof material would repel water, it wouldn't let the water in, it would keep it out.

If I wanted to wear a coat when it was raining, I would want that to be waterproof.

That's if I want something to absorb or to soak up liquid, I need an absorbent material.

So then absorbent means able to soak up liquid easily, and waterproof means something that keeps water out.

That's a really quick recap, I wonder if you can tell your screen what does absorbent mean? Absorbent means, tell your screen.

Amazing, absorbent means able to soak up liquid easily.

Well done.

And what does waterproof mean? Waterproof means, tell your screen.

Great, waterproof means it repels water or keeps water out.

Amazing, well done everyone.

So, I wonder if you can find some of these items in your home, you might have done that at the beginning of the lesson.

Here I'm going to give you another chance to get yourself prepared if you haven't got these already.

So today we are testing a variety of materials.

And just to recap, I'm going to use a cloth or sponge, a plastic bag or plastic cup, foil, cardboard or paper and cotton wool.

If you haven't got those things ready yet, I would like you to go and get those things ready now if you need to.

Pause if you need to go and get them ready.

Right, and now we're going to complete an investigation.

First, I would like you to draw this table, okay? So what you need to do is you need to draw this table with the following titles.

So you're going to write what you're testing in the top.

So you're going to be thinking about cloth or sponge, just like the one that you've chosen, a plastic bag or plastic cup, foils, cardboard or paper and cotton wool.

And then on the sides in the rows, you're going to write the headings, absorbent, question mark and observations.

I'm going to explain exactly what you need to do after you fill in the table.

So for the moment, just pause the video to draw this table.

Off you go.

Right, well done everybody.

Okay, I'm going to go full screen now, so I can show you what we're going to be doing.

So, while we are testing how absorbent a material is, we need to use a little bit of water.

Because remember, absorbing means able to soak up a liquid easily.

So I can use a different liquid, but we're going to use water it's an easy liquid for me to use.

I'm not going to pour a lot of water on each of these materials.

Firstly, that's going to make a really big mess and we don't want to do that.

And secondly, if I use a small amount, I can see carefully how absorbent each material is.

So, let's start with the cloth.

Now, here I've got some water and what I've done is I'm just going to use a teaspoon to put the water onto the material, so that I don't use too much and make a big mess.

If this cloth is absorbent, what will happen when I put a little bit of water onto the cloth? Tell your screen what will happen.

You can say if the cloth is absorbent, off you go, tell your screen.

Great, if the cloth is absorbent, it's going to soak up the liquid.

Will the liquid drip off the cloth do you think? Will the cloth repel the liquid? No, that won't happen if this is absorbent.

Let's have a look, shall we? Okay, I'm going to get a little bit of water, and not a lot it, I don't want to make a mess.

And I'm going to pour the water onto the cloth.

I can see and it's hard for you to see, you'll find out if you do it for yourself, the cloth got a little bit more wet, but it absorbed the water.

The water's not come off and dripping down, let's do it again.

Okay, I wonder if I could carry on.

I wonder if I could even dip a little bit of the cloth into the water, and what I put it out to is dripping but the cloth has absorbed, taken in a lot of the water.

And if I squeeze the cloth, that water comes out again.

So I know that the cloth is really absorbent, okay? So, in my table here, I would say, I would put a big tick in this box because the cloth or sponge is absorbent, and in observations, I want you to describe anything extra that you saw.

So I might write, the cloth is very absorbent.

It took in a lot of water, okay? And then you could even say, when I put the cloth, or when I dipped the cloth into the water, it absorbed a lot of water.

I could squeeze it and squeeze some water out, okay? You can write what you'd like in that column, it's things that you can see in that row sorry, things that you can see, extra observations that you have about the material.

Okay, let's have a look at one other together.

I'm not going to do them in order, I'm going to have a look the foil now.

So, my foil, here is my foil.

Now, I'm going to try and make this easy for you to see.

I'm going to get a teaspoon of water, I wanted to make a prediction out.

I want you to predict whether you think the foil is going to be absorbent or not.

Do you think that this foil is going to absorb or repel the water? Do you think it's an absorbent or waterproof? Tell your screen, I think.

Okay, let's have a look.

So I get my teaspoon of water, I'm going to pour it on.

Ooh, I don't know if you saw that? The water dripped right off.

Let me do it again just to test.

And the water dripping off, off to my table.

I don't want to make a mess, I'm not going to test it anymore, but the water was not absorbed at all.

So the foil is not absorbent, the foil is waterproof.

So what I would do, is in this box here, I would put a cross and I would say in my observations, the water, you could say the water dripped, or the water dripped off the foil, the foil is waterproof, okay? So I demonstrated with the cloth or the sponge, I used a cloth, and I've shown you what happens when we put some water on the foil.

And now it's your turn.

So what you're going to do, is your going to investigate whether your cloth or a sponge is absorbent, your plastic bag or plastic cup.

So I put a plastic cup, you can pour the water into the plastic cup for this one.

With a plastic bag be careful, you don't want to make a mess that you could find the opening of the plastic bag.

And you could try and pour a little bit of water into the opening of the plastic bag, to see if it keeps the water in or if it absorbs it.

And then with your cardboard or paper.

Again get your teaspoon and pour a little bit on and finally your cotton wool, get your teaspoon and put a little bit of water onto your cotton wool, and see which of those materials are absorbent.

Okay everybody, it's time for you to think about starting your investigation.

Just before you do, make sure you've done the following things.

So first of all, you need to ask your parents or carer, if you can use these materials to test absorbency.

You need to make sure you're in a space where you don't mind getting too wet, okay? So if you're going to use a lot of water and maybe you could do it in a bathroom or somewhere where it doesn't matter if you get too wet.

If not you can use a tea spoon to make sure that you're only using a little bit.

Make sure that any valuable items are far away.

So any phones, and obviously your watch, your sort of device, make sure you don't pour any water onto the laptop because that's not good for valuable items, and pour very small amounts of water onto the object.

And it will still help you to see whether that material takes in or absorbs the water, okay.

Off you go everybody, it's your time to investigate.

So pause the video now and have a go.

I will leave you with this table so that you know exactly what you're doing.

Off you go.

Okay, well done everybody, amazing work.

I wonder what you found.

Now, it depends on your materials.

You may have found different things from each other.

But, you probably notice the following things.

You probably noticed that the cloth was absorbent, the plastic bag was not absorbent.

If I pour water and I know you can't see inside into my plastic cup, plastic cups are so good for what they do, it holds all the water.

It doesn't absorb the water, okay? So this plastic is a very waterproof material.

You will have found with the foil that the water rolled or dripped off, so it's not an absorbent material.

With the cardboard or the paper, you might have found a similar thing to me.

You may have found that the cardboard absorbed some of the water, but it's not as absorbent as a cloth, and/or a sponge, or the cotton wool.

With the cotton wool, you hopefully will have found the cotton wool was really absorbent.

I could even pour a little bit of water onto this piece of cotton wool, and it absorbs that water, it soaks it up, I can feel that this is wet now, but it didn't pull onto the table, okay? Okay everybody.

So, can you tell your screen which material was the most absorbent.

You're going to say the most absorbent material was.

Tell your screen.

All right, I wonder what you found, either the cloth or the cotton wool, right.

And what was the least absorbent material? Can you say the least absorbent material was.

Right, well done.

So, the least absorbent material was probably your foil or your plastic cup, okay.

Now let's us have a think about the uses of these absorbent materials.

Why do you think towels need to be so absorbent? Can you tell your screen, I think towels need to be absorbent because, go.

Well, when people get out of the shower or the bath, you wrap a towel around you because your body has water on it, your body is wet.

So you need to use a towel to absorb that water so that you become dry.

Why does the sponge need to be so absorbent? Tell your screen.

Great, the sponge needs to be absorbent so that it can soak or clear up messes in your kitchen or anywhere else that's our liquid.

So you can soak up the liquid so that your kitchen or wherever else becomes clean, amazing job.

And why do you think wellies and umbrellas need to be waterproof? Not absorbent next time, why do they need to be waterproof? They need to be waterproof because, tell your screen.

Amazing, they need to be waterproof.

Waterproof, because they need to repel water so that you stay dry, great job.

And why do you think that water glasses need to be waterproof? Tell your screen.

Yes, so that they can hold water so that they keep water inside.

Amazing everyone.

What's happened if your coat was absorbent? When you were going outside on a rainy day, you get wet, it wouldn't repel the water it will soak it in, and your body would get wet.

Okay, amazing job everyone, it's now time for you to complete your end of lesson quiz after this video.

You've done some amazing learning, it's time for us to have an awesome cheer, so that goes like this, are you ready? Awesome, your turn.

Great job and I will see you next time, bye everyone.