Hello, everybody.

My name is Ms. Panchal and I'm so excited to do today's science lesson with you.

Now we are going to be learning all about waterproof materials, planning, and then doing a really exciting investigation.

Now have you got your thinking caps on? Let's all put them on together.

We've got lots of really wonderful learning to do in our lesson today.

Are you ready? Let's go.

So the outcome for today's lesson is I can plan and do an investigation to find out about waterproof materials.

So we've got such an exciting lesson today.

So we're going to practise saying some of the key words for our lesson today.

So I'm going to say the word and I would like you to repeat it back to me.

My turn, material.

Your turn.

Fantastic job.

My turn, properties.

Your turn.

Wow.

I'm so impressed, everyone.

My turn, suitable.

Your turn.

Amazing work, everyone.

My turn, waterproof.

Your turn.

Excellent, everyone.

Well done.

My turn, investigate.

Your turn.

Wow, everybody.

I think everyone deserves a pat on the back.

That was such fantastic practise of saying the key words.

Now we are going to use all of these key words in our lesson today.

So our lesson is split up into three different sections today.

So we've got lots of learning to do.

Let's get started with the first part of today's lesson.

So Alex says, "Have you ever seen a chair made of wool?" Sophia says, "Have you ever seen a saucepan made of chocolate?" And Lucas says, "But why not?" Do these materials have the right properties to be made into these objects? Have a little think with your talk partner.

Excellent work, everybody.

For example, if we had a saucepan made out of chocolate, if I was heating up my tomato soup for example, as soon as I made it hot, all of the chocolate would melt.

So it wouldn't be a very good saucepan.

Well done, everyone.

So the properties of materials make them suitable for different jobs and this means the job they are suited to or well matched to.

What would be a suitable material for a chair? Would it be a chair made of wood, chair made of metal, a chair made of plastic? So a chair can be made from different materials.

For example, wood, plastic or metal.

These are all strong and stiff materials, which means the chair would last a long time and you would be able to sit on the chair.

Let's do a check of our learning.

The children are talking about the best material to make a rug from.

Now Aisha says "The best material for a rug is wood, because it is hard and doesn't bend." Whereas Jacob says "The best material for a rug is fabric, because it is soft and comfortable to sit on." Who do you agree with? Aisha or Jacob? Have a little think with your talk partner.

Fantastic work, everyone.

Well done.

So Jacob is right.

The best material for a rug is fabric because it's soft and comfortable to sit on.

Now if we went with what Aisha said, if we had a rug made out of wood, that would be quite hard to sit on and actually would hurt us after a while.

Well done, everyone.

So some materials don't let water through.

Do you know what this property is called? Can anyone tell me? Fantastic.

Well done, everyone.

So this is called being waterproof.

Can you say that for me? Well done, everyone.

So can you think of any objects that need to be made from waterproof materials? Have a little think.

Excellent work, everybody.

So there's lots of different materials that will need to be an object, sorry, that would need to be made from materials that are waterproof.

For example, a raincoat.

Now I wear my raincoat when it's raining outside and if that wasn't waterproof, all of the water would go inside and make all my clothes wet.

But also, for example, Wellington boots.

If you are going out for a muddy walk at the weekend, if your Wellington boots weren't waterproof, then all the water would go inside and you'd get very, very soggy and wet and muddy socks, which not would be very good.

So Welly boots and rubber gloves are made from materials that are waterproof.

Why do you think that is? So I've just mentioned a little bit to you about Wellington boots, but let's have a think about cleaning gloves and gardening gloves for example.

Why do you think they need to be waterproof? Maybe you can share your ideas with other children in your group.

Super job, everyone.

Well done.

So rubber gloves, keep your hands dry and Welly boots keep your feet dry.

They do not let water pass through.

And as I said, if your Wellington boots were not waterproof, you'd have some very, very wet socks, which would not be very good.

So let's do a check of our learning.

Which of these are properties of materials? A.

Waterproof.

B.

Rough.

C.

Book.

D.

Pencil.

So which of these are properties of materials? Have a little think.

Amazing work, everyone.

Well done.

So waterproof and rough are both properties of materials and a book and a pencil are both objects.

Let's do another question to check our learning.

Materials that do not let water pass through them are.

A.

Smooth.

B.

Transparent.

Or C.

Waterproof.

So think this is materials that do not let water pass through them.

Have a little think.

Fantastic work, everyone.

The answer is C.

Waterproof.

Well done, everyone.

So let's move on to the first task.

Look at this list of different objects.

So we've got a table, a spoon, a bottle, a book, a jumper and a window.

Andeep says, "What would be a suitable material to make each of these things from?" And Sofia says, "What would not be a suitable material to make each of these things from?" So think back to earlier when we had a suggestion of a chocolate saucepan.

That would not be a very good idea.

So what I would like you to do, is have a look at the list of the different objects.

Think about what would be a suitable material and think about what would not be such a good suitable material.

If you would like to, you can write down your ideas or you can have a talk with your talk partner and maybe a teacher can record your conversation.

Have a go at this task and I look forward to going through all of your example answers.

Off you go.

Fantastic work, everybody.

Well done.

So let's go through some examples.

So a bottle.

Plastic, glass and metal are good materials for making a bottle because they are strong and can be made into the right shape.

Fabric or wool would not be a good material because they would let the water out.

And actually if you go to drink from your water bottle, there won't be any water left.

A spoon.

Plastic and metal are good materials for making a spoon.

They are strong and don't bend.

Fabric would be too bendy to make a spoon.

Glass or wood would break and might hurt your mouth when you use the spoon.

A table.

A table needs to be made from strong, stiff material like wood or metal.

Paper or fabric would not be good materials for a table because they are very bendy.

So if you had a table made out of paper, it wouldn't be very strong.

Next, a book.

A book is usually made from paper.

Paper is lightweight and flexible, which also means bendy, which makes it a good choice.

Glass would break too easily and metal might make it too heavy to lift.

A jumper.

So fabric such as wool is a good material for a jumper because it is soft and bendy, and it helps to keep you warm.

Chocolate would be a bad material for a jumper because it would melt very quickly.

Next, a window.

A good material for a window is glass because you can see through it.

If a window was made of metal or wood, it would not let any light through.

And if a window was made of wool, it would let the rain and wind in.

Fantastic work, everyone for giving this task a go.

I know it was a little bit tricky to think of lots of different materials, but you all did such a fantastic job.

Well done.

So we've learned about suitable materials and we're now going to move on to waterproof materials.

So some materials are waterproof, and some are not.

Which of these coats do you think is made from a waterproof material? So we've got coat 1, coat 2, and coat 3.

Maybe you have one of these types of coats yourself or maybe one of the adults around you has one of these coats.

Which of these coats do you think is made from a waterproof material? Have a think.

Fantastic job, everyone.

The answer is coat 3.

So coat 3 is a waterproof raincoat.

So here we've got a picture of Jacob, his dad, and his teddy.

So Jacob says, "My teddy keeps getting wet when we go for walks in the rain.

I want to make a hat to keep him dry.

Which material should I use?" So Jacob has a problem and we are going to help him try and find the answer.

So Jacob takes out some different materials from his material box.

He's got denim, foil, hessian, wool, cotton and plastic.

How can we find out which materials are waterproof to keep teddy dry? Does anyone have any ideas? Well done, everybody.

So Aisha says, "When scientists find things out, we call this investigating." And Laura says, "When we investigate whether materials are waterproof or not, we can test and compare different materials." And scientists investigate materials to find out which are waterproof and which are not.

But how do you think they do this? Pause the video in here and have a think with your talk partner.

How do you think scientists investigate whether materials are waterproof or not? Talk with your talk partner.

Well done, everyone for having a great discussion with your talk partner.

So Andeep says "We could leave all the materials outside and wait for it to rain and then see which of them get wet." Is this how a scientist would test the materials? What are your ideas for finding out which materials or waterproof for Teddy's hat? So did you get a similar idea to Andeep or did you have a different idea? Maybe you can work with your partners to come up with another idea.

Let's do a quick check of our learning for this part of the lesson so far.

True or false? All materials are waterproof.

Do we think that's true or do we think that's false? Well done, everybody.

The answer is false.

Now we need to have a little think about why.

Do we think it's because A, no materials are waterproof.

Or do we think because it's B, some materials are waterproof? What do you think? Hands up for A or hands up for B? Fantastic work, everybody.

The answer is B.

So we know that some materials are waterproof, but not all materials are.

Well done, everyone.

So let's move on to the next task for this lesson.

So I would like you to talk to a partner or in small groups and think about what you might do to test the materials for how waterproof they are.

I would like you then to draw a picture or you can tell someone your ideas.

So Izzy says, "Don't forget to think about the things that you will need." So on a piece of paper, either with your partner or in a small group, I want you to think about how you could test materials for if they're waterproof or not.

So draw some pictures to help you put down your ideas and to make sure that you think about what things you will need for your investigation.

Have a go at this activity and we'll go through an example really soon.

Off you go.

Well done, everyone.

I'm so impressed with all of your drawings and all of the different ideas that you had, so impressed.

So you may have thought of an idea similar to this.

So this group have thought of actually using a pipette and then there's material covering a top of a cup using a rubber band and they've used a plastic cup and a cotton wool ball at the bottom.

Is your idea similar to this or is it a little bit different? Well done for having a good go.

So we've spoken about suitable materials and we've learned a little bit about different waterproof materials.

And so we're now going to think about testing waterproof materials.

So let's get started with the final part of today's lesson.

So Jun says, "I want to help Jacob to make a hat suitable for his teddy.

I have made a plan for my materials that are waterproof investigation." So things that I will need, different materials, water, a plastic cup, rubber band, a pipette or measuring jug and cotton wool.

So whenever you are completing an investigation, it's really important you think about what things you will need and it's important that you get all of those things ready so that you can complete your investigation as best as you can.

Jun then says, "This is what I will do to investigate which materials are waterproof." So this is like our method, talking about what we will do.

So Jun has said the first thing he will do is place cotton wool into the cup.

Step number two will be to place the material over the top of the cup and keep in place with a band.

Step three would be to use the pipette to drip 20 drops slowly onto each material and observe what happens.

So when we observe something, we use our eyes to see.

And step number four is to observe how many drops come through each material and also feel the cotton wool to check if it feels wet.

So Jun has thought about how to investigate whether materials are waterproof.

In the previous slide, he's told us what things he will need.

And on this slide here, he's written down what he will need to do.

So Jun now says, "I will write down the name of each material and then how much water has passed through each one.

I can use a table like this one to record the results when I investigate." So when you are doing an investigation, you may want to record your results in a table like this.

So Jun's one has material in one column, a number of drops of water in cup.

So the different materials Jun has decided to use is denim, foil, cotton, plastic, wool, and hessian.

Jun then says, "At the end of the investigation, I will compare the materials and observe which one has let the most water through." But Sam says, hang on a second.

"Are you sure it is the most water?" What do you think? Super job, everyone.

Actually, Jun has made a little mistake.

It's actually observing which one lets the least amount of water in because that's going to mean that the material is waterproof.

Well done, everyone for spotting that.

Jun then says, "I will compare the materials to help me to decide which one has let the least water through or no water at all.

This will be the material that is the most waterproof and I will choose this material to make a hat for Jacob's teddy." So let's do a check of our learning.

Which of these statements is true? A.

Scientist test materials to find out if they are waterproof.

Or B.

Scientists only guess which materials are waterproof.

Which one do we think is correct? Super work, everyone.

Well done.

The answer is A, scientists test materials to find out if they are waterproof.

So we're going to move on to the next task for today's lesson.

So I would like you to test materials to see if they are waterproof or not.

Use Jun's ideas or your own task from task B.

Collect your results in a table.

See if you need to use Jun's ideas or your own idea from the earlier task in the lesson and collect your results in a table.

You might want to record your results in a table like this one on the screen, or you might want to record them slightly differently.

It's completely up to you.

So there is a couple of things that you might need.

So you may need a plastic cup, a pipette, cotton wool, a rubber band, and a measuring jug if you're using similar idea to Jun or you may have got a slightly different idea from the task earlier.

So pause the video here, have a go at this investigation and I can't wait to hear all about it a little bit later on.

Off you go and have fun.

Well done, everyone.

I am so impressed with your learning.

You have worked so incredibly hard on this investigation and I know you found some amazing results.

So well done, everyone.

So here are some example answers.

You may have got similar answers to this or you may have got slightly different ones.

So this chart here had denim, the number of drops of water in a cup were 10, and it was not waterproof because some water drops fell through into the cup.

The foil, the number of drops of water in the cup was zero, which means it is waterproof.

For cotton, there were 12 drops of water in a cup, which means it is not waterproof.

Plastic, there was zero drops of water in the cup, which means it is waterproof.

The wool had 15 drops of water in the cup, which means that it is not waterproof.

And the hessian had 18 drops of water in the cup, which means it is not waterproof.

So some of the materials that this example tested were waterproof and some were not waterproof.

Did you get similar ideas to this or did you get different ones? Well done for having a good go at this investigation, everyone.

I'm so impressed with your learning.

So we've come to the end of our lesson today all about waterproof materials.

Now the properties of materials make them suitable or not suitable for different jobs.

And one property of materials is being waterproof.

And this means it does not let water pass through.

And scientists test materials to find out which are waterproof and which are not.

And I hope that you had a great time doing that investigation, testing those different materials.

A big pat on the back for everyone today because you've all worked so hard to learn about waterproof materials.

You planned an investigation, but then also you carried up the investigation as well.

So a big well done to everybody.

Now have a great rest of the day and I'm sure I'll see you in the next science lesson very soon.

Bye-bye, everyone.