Hello everybody.

My name is Ms. Pantel and I'm so excited to do the next science lesson with you.

Are you ready to learn with me? Well done.

I'm so excited.

So our lesson today is learning all about transparent and opaque materials, and we're going to be planning an exciting investigation and also doing it.

We've got lots of learning to do today.

Have you got your thinking cap on? Let's put it on together.

Let's get started with our lesson today.

So the outcome for our lesson today is I can plan and do an investigation to find out about transparent and opaque materials.

So we're going to practise saying some key words that we are going to use in our lesson.

So I'm going to say the word and I would like you to have a go at saying it back.

My turn.

Material.

Your turn.

Fantastic job.

My turn.

Light.

Your turn.

Fantastic job.

My turn.

Transparent.

Your turn.

Super work everyone.

My turn.

Opaque.

Your turn.

Wow everyone I'm so impressed.

My turn.

Result.

Your turn.

Wow everyone.

I'm so impressed with how you've said all of those key words.

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

So our lesson today is split up into two parts.

So we're going to think about those two key words, transparent and opaque.

And we're going to learn what they mean and then we are going to think about testing different materials.

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

So different materials have different properties and some materials let light pass through them.

For example, we can see children looking through a window and we can see a glass floor in a skyscraper building.

This means that we can see through them.

So we often call them see through materials.

Andeep and Sophia are talking about properties of materials.

Andeep says "Glass is a material that is smooth, breakable and see-through." And Sophia says, "I know another word that scientists use that means see-through." Do you know another word for see-through? Can you tell me? Wow.

Well done everyone.

I'm so impressed that you know that word.

Materials that let light pass through them are called transparent materials.

Can you say that word for me? My turn.

Transparent.

Your turn.

Excellent job everyone.

This word is a really important word for today's lesson.

So this aquarium fish tank is made of a transparent material because it lets light pass through this material so that we can actually see all the beautiful and wonderful fish inside the aquarium tank.

So let's do a check of our learning.

Materials that let light pass through them are called A, smooth B, transparent or C waterproof.

What do you think? Super job everyone.

Well done.

That was our key word that we've just learned.

Transparent.

So materials that let light pass through them are called transparent.

Well done everyone.

Let's move on to the next question.

Which of these objects is made from a transparent material? A, a window B, a wall C, a plate.

Have a little think.

Super job everyone.

Well done.

The answer is A, a window because it lets light pass through and we can see through the window.

We can't see through a wall and we cannot see through a plate.

Well done everyone.

So the children keep thinking and talking and Andeep says, "Not all materials let light through.

What should we call a material that is not transparent? Sophia says, "I'm not really too sure.

Untransparent? Not transparent?" Do you know what that special word is? Can anyone tell me? Well done.

I think you do know what it is.

Materials that do not let light pass through them are called opaque materials.

Now this is quite a tricky word to read and say.

So let's have a go at saying it again.

My turn.

Opaque.

Your turn.

Good job everyone.

This is another really important word for our lesson today.

Now this door is made of an opaque material, because it does not let light pass through them.

So we cannot see through the door.

Let's do a check of our learning from this lesson so far.

Materials that do not let light pass through them are called A, transparent B hard or C opaque.

Which one do you think is correct? Have a think back to the learning we've just done.

Excellent work everyone.

Well done.

The answer is opaque.

Now this word means that it, the material does not let light pass through it, okay.

So we've looked at lots of key words in the lesson and two key ones really important for today are transparent, which means materials that do let light through.

And the word opaque here is materials that do not let light pass through.

Let's move on to the next question.

Which of these objects is made from an opaque material? So think back to what the word opaque means.

We've got A, an aquarium tunnel, B, a tin, C, a glass.

So which of these objects is made from an opaque material? If you need to, go back to the last few slides to recap on what the word opaque means, have a little think.

Super job everybody.

Well done.

The answer is B, a tin.

So opaque means it does not let light pass through the material.

So we cannot see through the tin.

That does not let light pass through.

But with the aquarium tunnel it does let light through.

We can see all the lovely fish in the fish tank and in the tunnel.

And for C, a glass we can see through the glass or we can see what liquids inside.

Good job everyone.

So let's move on to the first task of today's lesson.

So I would like you to go on a materials hunt around your home or school.

Which objects can you find made from transparent and opaque materials? Take some photographs and make, take some photographs and make a list.

Compare what you found with a partner.

So go on a little hunt for me, and you can either do some drawings or take some photographs or you can make a list of different materials that you find are transparent and opaque.

Now remember, transparent materials are materials that do let light through.

And opaque materials are materials that light cannot pass through.

Have a go at this task and I look forward to hearing and seeing all of the different materials you found.

Off you go.

Well done everyone for having a go at this task.

I hope you had a great time on your materials.

And I can see all of the lots of writing on your sheets of paper.

So well done everyone.

So you may have got a few of these examples.

So in the transparent section you may have found a cup, a bottle, and a glass.

And in the opaque section you may have found mugs, a banana, a bottle, or even a hat.

Now these are just a few different examples.

Did you get some of these ones or did you get some different ones? Now well done for completing the first part of today's lesson.

Now those two key words again are really important, transparent and opaque.

And we are going to use that knowledge to help us complete an investigation now.

So Andeep is thinking about how we can use transparent materials.

Andeep says "I need to find a transparent material to make a window for my Teddy's den." So here is the Teddy's den now and Andeep needs to find a material to make a window.

Sophia is thinking about how we can use opaque materials and Sophia says, "I need to find an opaque material to make a sleep mask." Now some people wear sleep masks to help them sleep because it becomes very dark, which helps them to relax, stay calm, and then eventually fall asleep.

So scientists plan and carry out simple tests and they can find out which materials are best for different jobs.

So Andeep says, "How can we test different materials to find out which ones are transparent and opaque?" Do you have any ideas? Talk to your partner about a plan.

So what I'd like you to do is pause the video here and have a think, how can we test different materials to find out if there are transparent or opaque? Pause the video and jot down some of your ideas on a piece of paper once you've spoken to your talk partner.

Off you go.

Super job everyone.

Well done.

I can see you've worked really hard to think about different ways that we can test materials.

So Laura has an idea.

Laura says "You can hold up each material to check if you can see clearly through it." What do you think? Do you think her idea is a good idea? Did you have the same idea as her or did you have a different one? Lucas has another idea.

He says "You can turn the lights off and shine light from a torch through each material to see if it passes through or it is blocked." So here is an example.

What do you think? Did you come up with the same idea as Lucas or did you come up with a different one? Well done for thinking.

I know it was quite tricky but I'm so impressed with your ideas everyone.

Well done.

So let's do a check of our learning.

Scientists can find out which materials are transparent and which materials are opaque by, A measuring them, B, counting them, C testing them.

Which one do you think is correct? Have a think with your talk partner.

Super job everyone.

Well done.

The answer is C testing them.

So let's move on to our next question to check our learning.

The children are planning to test materials to find out if they are opaque.

So Laura has said, "I will test each material by pouring water on it." Alex says, "I will test each material by feeling it." and Izzy says, "I will test each material by shining a torch on it." Who do you agree with? So think back to the learning we've done in our lesson.

Think to what the word opaque means and think about which test will be most effective for finding out whether if it's opaque or not.

Who do you think is correct? Super job.

Izzy is actually correct.

So you need to know if light passes through a material to find out if it's opaque.

So what Laura said about pouring water on it is not going to help us investigate whether it's opaque or not.

And also feeling the material, which is what Alex said, will not help us.

But shining a torch by the material on it will help us to find out if it's opaque or not.

So well done for having a good go at answering this question everybody.

So when scientists carry out tests, they need to write down what happens so they can remember it for later.

So when I find things out, I write down the results of my test.

So the results of any test can be recorded in a table like this.

So depending on what investigation you are doing, you may have different subheadings for your table, but it's really important that you do record your results.

So for example, in this investigation you may have got a table like this.

So we've got material and can you see through it clearly? Let's do a check of our learning.

The results of an investigation can often be recorded in A, a torch B, a table C, a chair.

What do you think is the correct answer? Fantastic work everybody.

Well done.

I can really see you've got your thinking hats on today.

Hands up for A, a torch, B, a table or C, a chair.

Well done.

The answer is B, a table.

So we said that the results of an investigation can be recorded in a table.

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

So I would like you to use your own plan or you can use ideas from Laura and Lucas to test different materials and find out which are transparent and which ones are opaque.

So Andeep's question here was, "Which transparent material is best to make a window for Teddy's den?" And Sophia's question is, "Which opaque material is best to make a sleep mask?" So whenever doing an investigation, it's always really important you go back to the original question.

So can you help Andeep Sophia, find out? I definitely think you can.

So I would like you to pause the video now and have a go at your investigation, and make sure you record your results in a table too.

Complete your work in small groups and ask an adult for help if you need to.

Off you go.

And I can't wait to hear it all about your investigation.

Off you go.

Super job everyone.

Well done.

I am so impressed with all of your work today.

You've worked incredibly hard to test different materials to find out which ones are transparent and which ones are opaque.

So you may have had a table of results like this.

So this child here has used different materials.

They've used clear plastic, kitchen foil, food wrap, and denim fabric.

So with the clear plastic, yes they could see through it clearly.

The kitchen foil, no they could not see through it clearly.

Food wrap, yes, they could see through it clearly.

And denim fabric, they were not able to see through it clearly.

So did you get results that are similar to this or did you get some different ones? Well done though for having a great go at this task.

So we've come to towards the end of today's lesson.

So let's do a summary of our learning.

So some materials, let all light pass through and these are called transparent materials and you can see through them clearly.

Some materials do not let light through and these are called opaque materials.

Scientists plan and carry out simple tests to find out which materials are transparent and opaque.

And the results of an investigation can be recorded in a simple table.

Now today you did an example of a simple table and maybe you've had opportunities to have and draw out simple tables in your other lessons too.

So well done for all of your work today.

Now let's just go over those two really important words for today's lesson.

So I'm going to say them and I want you to say it back to me 'cause they're really important for you to learn.

My turn.

Transparent.

Your turn.

Fantastic.

My turn.

Opaque.

Your turn.

Superstars.

Well done.

Now as I said, those words are really important.

And remember, transparent materials are materials that let light pass through so we can see through them clearly.

For example, glass.

And some materials do not let light through.

And those materials are called opaque materials.

So it's really important you remember the difference between transparent materials and opaque materials.

Now a big pat on the back for everybody for today's lesson.

You've worked so hard and worked really hard on learning those keywords, planning your investigation, but also doing your investigation too.

So a big well done to everybody.

Have a great rest of the day and I'll see you very soon in the next lesson.

Bye-bye.