# Lesson video

In progress...

Hi, everyone, welcome to today's science lesson.

I'm Miss Harris.

What's your name? It's lovely to meet you.

Should we do a virtual high five to get started today? Ready? So we're going to high five in three, two, one, go! Great job.

Now today is our last lesson of our materials unit.

We are going to be looking at which materials are best for different objects.

So which material is best for different objects.

We'll be looking at why certain materials are used for particular things because they have a purpose.

We are also going to be doing our star words, looking at properties in materials, identifying materials and their properties.

Then we're going to look at using different materials for different objects, and then we've got our end of lesson quiz.

Don't forget that the end of the lesson, I'm going to be asking you to tell me, what material is behind me? In this lesson, you will need an exercise book or a piece of paper, a pencil or coloured pen, and coloured pencil sorry, and the coloured pencil, and most importantly, your brain.

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

Well done.

Now let's do our star words.

So, it's going to be my turn then your turn.

You ready? Waterproof, absorbent, compare, absorb, materials.

Good job.

So a scientist is a person who studies the, are you ready to join in the actions? The world around us, including things, living and non-living.

Good job.

Let's start by looking at properties of materials.

Now here I've got lots of pictures of different properties that represent different properties, can you pause the video and name all of them? Let's see if you can remember.

Pause the video and do that now.

Great, so let's check.

So let's do the action, let's see if we can remember.

Soft, hard, absorbent, waterproof, transparent, opaque, shiny, dull, stretchy, bendy.

So remember our elastic band is bendy, but it's also stretchy so I can bend it any way that I want, but it's also stretchy.

Good job.

Now, we're going to identify some materials and their properties.

So first look at the picture, what is in the picture? What is the object? The object is a, crayon, well done.

Do you know what crayons are made out of? So they are made out of something called wax.

Now I want you to describe two properties of wax.

So you're going to pause the video and look at this word mat here.

Can you choose two properties to describe the wax crayons? Okay.

So I might describe them as quite soft because when I write with a crayon, bits of it break off onto my paper and that's how I can draw.

So they're quite soft and I would also describe them as waterproof because if I put my crayon in the water and take it back out again, I can still use it.

What did you have? What properties did you think of? Well done.

Great job.

Let's do the next one.

So what can you see here? What is the object? A wheel or a tyre well done? What's it made out of? Rubber, well done.

Good job.

And can you name two properties to describe rubber? So pause the video and do that now.

So I might describe the tyres as being waterproof because when I drive in my car, my wheels they get wet, but the water is not soaked up by the tyre.

And I might describe them as quite dull because they're not very shiny are they, not super shiny like a coin or some glass? They're quite dull.

What did you describe them as? What properties did you think of? Can you tell your screen? Wow, amazing.

Great job.

Now it's time for our pause moment.

Take a look here at the scissors and the paper, which material, the metal scissors and the paper would I describe as dull? Which material would I describe as dull? Have a think.

Tell your screen and then press play when you're done.

Which one did you think was quite dull? The paper you're right, because the metal on the scissors sometimes it's quite shiny isn't it? Amazing.

Well done.

Okay, so let's do one more of these.

Here I've got some paper from a book, so there's paper from a book.

How can I describe the paper? Can you choose two properties to describe the paper? So we already know that we could describe paper as being dull.

Can you choose two different ones instead of using dull? So I might describe the paper as being bendy because I can move the paper and I might describe it as opaque because it keeps the light out.

What did you have? What two properties did you think of? Great job.

Well done.

So now let's take a closer look at the use of materials for different objects.

So here you can see someone is holding a bottle.

I've written the sentence down here.

Can you put your finger on the pink letters that say bottle? So put your finger on it? We're going to read ready.

Bottle is, So the bottle, is made from plastic.

It is hmmm so that, so I would write, it is, Hmm.

It is transparent so that I can see what liquid is inside the bottle.

Can you think of a reason why that material, why plastic is transparent? Or you might think of a different property and describe it.

So why is the plastic bottle, why is it waterproof? Can you tell me why? So first think of a property to describe plastic and then can you tell me why we have that property? So you're going to do write it down in your book.

So I might write it is transparent so I can see what liquid is inside.

Can you have a go? Well done.

So now we've got a hot water bottle.

So the hot water bottle is made from rubber.

Can you think of a property to describe the rubber and why do you think we have that property for it? What is the purpose of it? The need? What is the need for it to be like that? So first choose one property.

So the hot water bottle is hmmm choose one here.

So it is waterproof.

Why is it waterproof? What do we put inside the hot water bottle? We've got hot water inside it.

Why do you think then, it needs to be waterproof, if we're putting boiling hot water inside it, can you pause the video and write the sentence below? It is waterproof so that, so that it's stops the hot water from leaking out of it.

So it needs to be waterproof so that it doesn't absorb the water because otherwise it might burn us might en it.

It can get worm and hot the bottle, but we don't want it to spill the water.

Okay.

Let's do one more.

The door is made from wood, it is hmmm so that, so can you think of a property to describe the door and tell me why that property's important? Why is it made that way? Pause the video and have a go at that now.

Well done.

So I might say the door is opaque so that you cannot see what's inside the door because I have a door on my bathroom so that no one can see me when I'm in the bathroom.

Or my front door so people cannot see inside my house.

Okay.

Now you are going to write down what material you would use to make each of these objects.

So let's take a look at one.

So to make a table I would use hmmm.

So you're going to write down what material you would use to make the table.

And I want you to think about why you're using that material.

So pause the video, have a go at that one.

Well done.

Now, can you have a go at this one, to make a car I would use hmmm.

So what would you use to make the car? What material? well done.

Let's do the next one.

To make a jumper, I would use hmmm.

So think carefully what material you would use and why.

So would you use metal to make a jumper, pause the video and do that one now.

Well done.

Now we've come to the end of our lesson.

So it's time for the end of lesson quiz, where you can answer the three questions to see how much you have learned this lesson.

But before we go, can you tell me what material is used in my background? Can you shout it? It's called.

cardboard.

Well done.

Cardboard is used lots, to store things and keep things safe.

So maybe if you're moving house, you might pack all your things in a cardboard box, or if you order something online on the computer, it might come in a cardboard box to protect it.

Well done.

Now we are at the end of our unit of work called materials, if you would like to share any of your work that you have completed over the last few weeks, you can ask your parent or carer to take a picture of it, and you can post it onto Instagram, Facebook, Twitter, by tagging Oak National and the hashtag #learnwithoak.

I hope you have a wonderful rest of your day, and I will see you for more science next time.

Bye.