Hi, everyone.

It's Ms. Pancho here, and I'm so glad that you have decided to join me on today's science lesson.

Now, we're gonna be continuing to explore magnet and magnetism, and we're gonna think about whether we can block magnetic force or not.

So lots of exploring to be done in today's lesson.

So let's get started.

So the outcome for today's lesson is I can explore different materials to investigate if magnetic force can be blocked.

Now, we're going to go through some keywords here for today's lesson, and we're going to practise saying them.

So I'm going to say the word or phrase and you are going to say it back to me.

My turn.

Magnetic force.

Your turn.

Super.

Well done.

My turn.

Block.

Your turn.

Good job.

Well done.

My turn.

Non-contact force.

Your turn.

Super, well done.

My turn, material.

Your turn.

Great work, everyone.

My turn.

Predict.

Your turn.

Excellent job, everybody.

Well done for practising to say those keywords.

Now, some of you might know what some of these words mean and some of you may not be so sure, but please don't worry because we're going to go through all of this in today's lesson.

So here are some of the definitions, but as I said, please don't worry if you're not too sure about what these keywords and phrases mean because we're going to learn them in today's lesson.

So we're going to split up today's lesson into two parts.

So the first part, we're going to be thinking about magnetic force and acting through materials.

And then the second part, we're gonna be answering the question of can you block the force? So let's get started on today's lesson.

So magnetic force is a non-contact force.

This means it can act at a distance.

Magnets can attract magnetic objects when there is a gap between them.

So let's look at this diagram here.

So we've got a magnet and we've got a fork and we know that magnetic force is working there.

However, there is a gap.

What would happen to magnetic force if a material was placed in the gap? So pause the video here for a moment.

Either talk with your talk partner, maybe jot down some of your ideas on a piece of paper, and think about what would happen to magnetic force if a material was placed in the gap.

Play the video again when you're ready to continue.

So magnetic force can act through some other materials.

So let's look at this diagram here now.

So we've got a magnet on the left-hand side.

We've got our fork on the right-hand side, but actually, in this diagram here, we've got something a little bit different because a piece of paper has been placed between the magnet and the fork.

This means that a magnet could attract a magnetic object when there is another material between the object and the magnet.

So in this example here, they've used a piece of paper.

So we're going to do a quick check of our learning so far just to ensure that everybody feels comfortable with the learning we've done so far.

So I'm going to read this sentence to you and I want you to have a think about what is the missing word? Magnets can magnetic materials even when there is a space between them.

So have a think back to the learning we've just done in this lesson and think about what that missing word could be.

I'll give you a few moments and then we'll go through the answer.

Super work, everybody.

The word is attract.

So magnets can attract magnetic materials even when there is a space between them.

So our next question is true or false.

A magnet can attract an iron nail even when there is a piece of paper between the magnet and the iron nail.

So I want you to have a little think about whether this is true or false.

I'll give you a few moments and then we'll go through the answer.

Amazing work, everybody if you said true.

Now, we're going to extend this answer a little bit and we're going to have a think about the reason why.

So do you think this is because A, magnetic force can work through other materials or B, magnetic force would be blocked by the paper? So I'll give you a few moments now to have a think about which option you think is correct, A or B, and then we will talk through the answer.

Amazing work, everybody.

The answer is A, magnetic force can work through other materials.

So let's move on.

This steel paperclip has been dropped in a plastic bottle.

So we can see in the picture here we've got a plastic bottle, maybe a drinks bottle and a paperclip is stuck in that bottle and it's been dropped in there.

Steel is a magnetic material, but the magnet will not fit in the bottle.

Now, I want you to have a think now how could magnetic force be used to get the paperclip out of the bottle? Now, you might want to pause the video here, have a talk with your talk partner or write down your ideas about how could magnetic force be used to get the paperclip out of the bottle? Play the video again when you're ready to continue.

So a magnet could be used to attract the paperclip through the plastic bottle using non-contact force.

So you can actually use a magnet here to attract the paperclip to actually get the paperclip out.

So we're going to move onto task A for today's lesson.

So make a plastic bottle maze to demonstrate how magnetic force can act through other materials.

So the first step in this task is to draw a maze or a winding path on the outside of a plastic bottle with a permanent marker, and you might need to ask an adult to get you one.

Each path needs to be big enough for a paperclip to fit in.

The second step is then drop a steel paperclip into the bottle and your challenge here is to ask a friend to drag the paperclip around the maze or path using magnetic force.

Then I would like you to have a think about why is it possible to move the paperclip even though it is inside the bottle? So I want you to challenge your friend to drag the paperclip around the maze and path to see if you can get the paperclip out of the bottle.

But I also want you to think about why is this actually possible even though the paperclip is inside the bottle, but the magnet is actually on the outside of the bottle? So pause the video here and have a go at your plastic bottle maze and press play on the video when you're ready to continue.

Good luck and off you go.

Amazing work, everybody.

Did you manage to guide the paperclip around the maze? So Sam here says I was able to move the paperclip around the maze even though it was inside the bottle and the magnet was outside because the magnetic force worked through the plastic material.

So we can see a picture here of somebody who's drawn a winding path on the plastic bottle and is using a magnet to guide the paperclip through to the top of the bottle.

So well done, everyone for that first part of the lesson there.

We're now going to move on to the next part.

So the question we're gonna think about answering in the second part of today's lesson is can you block the force? So is it possible to block a magnetic force? So we can see a diagram here.

We've got our magnet and we've seen this diagram quite a few times now and we've got the magnetic pull there.

Scientists carry out investigations to find answers to questions.

Sometimes the results are what they predicted and sometimes they are different.

What scientific questions could Laura ask to investigate whether magnetic force can be blocked? So pause the video for a moment here and have a think either with your talk partner or maybe write down some of your ideas, what scientific questions could Laura ask where she would be investigating magnetic force on whether it could be blocked or not? Click play when you're ready to continue with the lesson.

So Laura has suggested, does magnetic force work through paper? Does magnetic force work through every material? Which materials can block magnetic force? So there's lots of different questions here that Laura could investigate.

All of these questions could be answered with an investigation.

So using practical things to answer these questions.

What could Laura do to investigate her chosen question? So Laura here has said you could put different non-magnetic things between a magnet and a steel paperclip to see if the paperclip is still attracted.

So Laura collects things made from different non-magnetic materials and Laura has said here, "I will try to block magnetic force with." So these are the materials that Laura has chosen.

She's got paper, thick card, a plastic bag, bubble wrap, and my school jumper.

So Laura here has chosen quite a range of non-magnetic materials to use in her investigation.

She talks about what she thinks will happen.

"I predict the thicker materials, such as thick card and my jumper will block magnetic force." What do you predict will happen and why? So we can see that Laura here has chosen quite a few different materials and the range of materials she's chosen will really help to show her clear investigation and will really help her to show her understanding.

So what do you think will happen in Laura's investigation and why? So we're going to check our understanding of what we've learned so far in today's session for this part.

So in which order would the scientists usually do these activities? So we have a list of different things that a scientists would usually do in an investigation and we then need to think about putting them into the correct order.

So I'm going to read the different steps out to you first.

A, carry out the investigation.

B, make a conclusion.

C, ask a scientific question.

D, think about, predict, what might happen.

And E, record the results.

So I'm gonna give you a few moments now to think about which order would the scientists usually do these activities? Now, it might be helpful to jot down your ideas so you can maybe tick off the ones as you do them.

So have a few moments to think and then we'll talk through the answers shortly.

Amazing work, everybody, well done.

So we're gonna talk through the answers now.

So first, you're gonna ask a scientific question just like we saw that Laura asked quite a few different questions about what she wanted to investigate.

Then the next part is predicting.

So thinking about what might happen and that will really help you to get you thinking about what will happen in the investigation that you're carrying out.

Then the next stage is to actually carry out the investigation to see what happens and then record your results.

So that will be different ways that you record your results.

It might be through pictures, it might be through measuring.

It might be through filling out a table.

So depending on what investigation you're doing, you might record your results in different ways.

And the last part is to make a conclusion.

So a conclusion is sort of summarising what you've learned and answering your scientific question.

So these are the normal steps that a scientist would usually do when carrying out an investigation.

So our next question here is which of these would help you investigate how you could block magnetic force? So we've got A, putting different materials between a magnet and an aluminium can.

B, putting different thicknesses of paper between a magnet and an iron nail or C, putting different fabrics between a magnet and a plastic ruler.

So I'll give you a few moments to have a think and then we will go through the answer.

Amazing work, everybody.

The answer is B.

So plastic and aluminium are non-magnetic materials, so would not be attracted by a magnet.

Well done, everyone.

You're doing a super job so far.

So we're going move on to task B now.

So can different materials block magnetic force? So the first part of this investigation is we're going to tie one end of a paperclip to a piece of cotton thread or wool.

Then you're going to tape the end of the thread to the tabletop and then use the magnet to attract the paperclip and lift it up using non-contact force.

So if you have a look at the picture on the right-hand side there, we've got a bar magnet, we've got a paperclip, we've got some thread and it's been taped to the table.

Then I want you to try to block the force by putting different non-magnetic materials in the gap between the magnet and the paperclip.

So you can see from the picture here, there's actually a gap between the magnet and the paperclip.

So you're going to have a think about exploring and investigating putting different non-magnetic materials in the gap.

So I want you to think about what do you think will happen and are your results what you expected? So pause the video here, have a go at the investigation and click play when you're ready to continue.

Well done, everyone.

I'm sure you had a fantastic investigation.

So what did you find out? Your results might have looked a little bit like this.

So you may have tested paper and did it block the force? No, it did not.

Card was the material you may have picked.

Did it block the force? No.

You may have tried aluminium foil and that did not block the force either.

And the plastic, the piece of a milk bottle, did that block the force? No.

Did any of these results surprise you? Are your results what you expected? So Lucas here says, "I didn't think paper would block the magnetic force because it was thin and flexible, but I thought the thick plastic would block it because it was hard." Whereas Sam here is saying, "I thought my jumper might block the force because the fabric is absorbent." It was not possible to block the magnetic force.

Sometimes results are not what scientists expect.

So when you're doing a prediction investigation, you might think something will happen a certain way or your results will be a certain measurement or result.

But actually sometimes that might not always happen.

In investigations and scientists, sometimes results will be what you expect, but also sometimes results will be a little bit different to what you expect.

But that's the wonderful thing about science and the wonderful thing about completing investigations.

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

So we're going to do a summary of all the learning that we have done today.

So let's first start off with magnetic force.

So we know that magnetic force is a non-contact force, so it can act at a distance.

So it doesn't need to be touching the object.

We know that magnetic forces can act when some materials are placed between the magnet and the magnetic material.

So the investigations show different types of materials that you can place in between.

Scientists can carry out investigations to test which materials allow magnetic force to pass through.

And sometimes the results of a scientific investigation are different to what was predicted or expected.

So as I said, you may have conducted other investigations in your science lessons, and it's okay if your results don't turn out how you wanted them to because that's part of science.

And sometimes the predictions you made will be the answers on what you found, but also sometimes, it will be a little bit different as well.

But that's okay because we are all learning at the same time.

Now, we've come to the end of the lesson now, and I just want to say I'm so proud of you all.

You've done such an amazing job with all of the investigations and the practical work that we've done in today's lesson.

I hope this has really shown you that magnetic force is a non-contact force and it can act at a distance.

But, also I hope that you have a better understanding now of how magnetic force can or cannot be blocked.

Now, I hope you have a lovely rest of the day and I'm sure I'll see you very soon in the next video.

Bye-bye.