Lesson video

Hi everyone, my name is Ms. Panchal, and I am so excited that you've decided to join me on today's lesson.

So today's lesson is going to focus on different magnets and their parts.

So we're going to start off by looking at different types of magnets, different shapes of magnets.

We'll then move on to learning about the different parts of the magnets and learning some keywords and then you'll be exploring a compass.

So lots of exciting things to do in today's lesson.

So let's get started.

So our outcome for today's lesson is, I can identify and name different types of magnets and their parts.

So we're to talk through some keywords that we're going to think about in today's lesson that will come up in today's session.

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

My turn, magnet, your turn.

Super job, well done.

My turn, poles, your turn.

Excellent job, everyone, well done.

My turn, north-seeking, your turn.

Amazing.

My turn, south-seeking, your turn.

Fantastic job, everyone.

You've done such a great job of practicing saying these words.

I'm phrasing now, we are going to come across these words in our lesson today.

Some of these words you may have seen before or heard before, and some of them you may not have.

But please don't worry, because we're gonna learn about all of these things in our lesson today.

So we know a magnet is a metal which attracts some other metals.

And you may have heard about magnets before, seen magnets before.

Every magnet has two poles and on a bar magnet, these are at opposite ends of the magnet.

The north-seeking pole of a magnet is the part that points north if allowed to spin freely.

And lastly, the south-seeking pole of a magnet is the part that points south if allowed to spin freely.

So there are three different parts of today's lesson.

So lots of fantastic learning to be done today.

So the first part of our lesson today is going to be answering this question.

Are all magnets the same?

So we're going to be exploring this idea in the beginning part of our lesson today.

So magnets come in all different shapes and sizes.

And we can see on the screen here that we've got lots of different types of magnets and they're different shapes, but also different sizes as well.

Some of you may have seen these different magnets in your everyday life or maybe in your classroom or maybe at home.

But I would like you to have a little think.

Do you know the names of any of these magnets?

So pause the video here and you might want to jot down your ideas or have a talk with your talk partner.

And I would like you to have a look at images on the screen and think about do you know any of the names of these magnets?

Press play again when you would like to continue the lesson.

Super job, everyone.

I hope you had a great discussion there and had an opportunity to write down some of your ideas.

So the first example of type of magnet we're going to look at is a bar magnet.

And these magnets are shades like a bar, like a rectangle or cuboid.

They're often used in fridge magnets, in compasses, and science investigation.

So you may have seen them in your classroom.

We're now going to look at a horseshoe magnet and they're shaped like the letter U as part of the alphabet or a horseshoe.

So you can see they're on the screen, a picture of a bar magnet and a picture of a horseshoe magnet.

Now some of the things are a little bit similar between both, but also there is a few things that are a little bit different as well.

They're often used in engineering and building work to move large metal objects.

So you may not have seen a horseshoe magnet, but you may have seen a bar magnet before.

So we're going to move on to the next type of magnet now, and this is a ring shaped magnet and this is circular and they have a hollow center.

And what it means by a hollow center is that the middle part is empty.

So we can see there on the screen with the picture of a ring shaped magnet, there is space in the middle and that means it's hollow.

For example, an Easter egg, Easter time, that's hollow because the chocolate is only on the outside, not on the inside.

They're often used in speakers, motors, and other technologies.

So you may not have seen this type of magnet before.

Another type of magnet is a button or disc shaped magnet and they're round and flat, just like a button or a thick coin.

So we think maybe about a one pound coin or a two pound coin, maybe two of those might be quite thick.

So we can see in the picture here, this disc shaped magnet is quite thick.

Small disc shaped magnets are often used in crafts and model making.

So you may have seen this type of magnet maybe in a toy that you've been given or something that you have at home.

So we are now gonna do a quick check of learning just to ensure that everybody feels confident with the learning that we've done so far.

So we have a true and false question here.

All magnets are the same shape and size.

True or false.

So I'm give moments now to have a little think about whether that statement is true or false.

And then we'll go through the answer.

Fantastic job everyone if you said false.

So all magnets are not the same shape and size and we just looked at a few different examples, didn't we?

So I would now like you to have a think about why that's the case.

So we've got two options here.

A, all the magnets we use in our science lessons are the same.

Or B, magnets can be different sizes and shapes including bar-shaped and horseshoe-shaped.

So again, to give you a few moments now to have a think about which answer you think is correct, A or B, and then we'll go through the answer in a few moments.

Fantastic work, everybody, the answer is B.

So we know that this is false.

I think this because magnets can be different sizes and shapes including bar-shaped and horseshoe-shaped.

So we just saw earlier in the lesson that there's lots of different types of magnets.

They come in different shapes and different sizes.

So the next question here is looking at some different pictures.

So the question is, which of these is a bar magnet?

So we've got option A, option B, and option C.

So I want you to have a think about the learning we've done so far in this lesson.

Think about the word bar magnet and have a little think for a few moments about which of these pictures is a bar magnet.

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

You are a superstar.

You got the correct answer correct.

It's C, a bar magnet.

So we're gonna move on to the first task now.

So what types of magnet do you have in school or at home?

Explore using as many differently shaped and size magnets as you can and I would like you to also have a little think about how they're similar but also how they're different.

So in this task we're exploring different types and shapes of magnets and thinking about whether how they're similar but also how they're different as well.

So pause the video here, have a go at the task and then play the video again when we go through some example answers.

Fantastic work everyone.

I can see you put lots of extra effort into that task, exploring different magnets.

Now I'm going to talk for a few example answers.

You may have made some observations similar to this, but you may have seen a few different things as well.

So this child has said, "I tried two different bar magnets.

One was much bigger than the other one, but the smaller one picked up more safety pins.

" Another person has said, "I tried a horseshoe magnet and a bar magnet.

The horseshoe magnet was shorter but wider, and it was heavier.

They both attracted a spoon.

" So in both of these examples here, they use different types of magnets, but also they were thinking and using different objects as well.

So one used some safety pins and one used a spoon.

What did you find?

Did your results say something similar or were they a little bit different?

So, well done everyone for your work so far.

We've done a fantastic job of learning about different types of magnets and how they can be different shapes and also different sizes.

We're now gonna move on to the next parts of our lesson, which is all about the parts of a magnet.

So let's get going for the second part of our lesson.

I would now like you to have a look at this image on the screen.

Now the question I have for you is, what type of magnet is this?

To use those wonderful brain of yours and think back to earlier in this lesson and the different types of magnets that we were learning about.

And I would like you to have a think about what type of magnet this is.

You're a superstar.

Well done, this is a bar magnet.

Now I want you to look really carefully at that picture.

What do you notice about each end?

Fantastic, well done for spotting that on one end of the magnet is marked an N, and on the other side is marked an S.

These are called the poles of the magnet.

And every magnet has two poles.

We often call them the north and south poles.

So we can see a picture and diagram of our bar magnet here.

Again, the N and S are short for north-seeking and south-seeking poles.

So the north-seeking is the N and the south-seeking is the S.

This is because if you let a magnet spin, it'll turn until one end points to the Earth's north pole and the other points to the Earth's south pole.

So if we look on the right hand side here, the points of a compass we've got north, east, south, and west.

Now when I was little, my teachers always helped me to remember the points on a compass by never eat shredded wheat.

So we've got never, N, north, east, eat.

Shredded is south, and wheat is for west.

So that's how I remember the points of a compass.

The magnets north-seeking pole seeks or points towards north and always say seek, it means sort of find.

So with saying the magnet's north-seeking pole seeks or finds points towards north.

So we're going to do a quick check just to ensure that everybody is happy with the learning that we've done so far.

So this question says, which two letters would you find on the ends of a bar magnet?

A, N.

Option B is S.

Option C is E.

And option D is W.

So I'm gonna give you a few moments now.

Just have a little think and then we'll go through the answer shortly.

Amazing work everyone.

The answer is A, N.

And option B, which was S.

So it stands for N is for north-seeking, S is for south-seeking.

Well done everyone.

So our next check question is a sentence we need to fill in the missing gap.

So I'll read the sentence to you.

The proper name for the pole marked N is pole.

So have a thinker back to the learning that we've just done and think about what the proper name for the pole marked N.

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

Super work everyone.

The answer is north-seeking.

All magnets have two poles.

Some magnets, such as bar magnets, have the poles on each end.

For example, let's look here at another bar magnets.

We've got the south-seeking pole, we've also got the north-seeking pole, and this is a diagram of a bar magnet here.

Some magnets such as ring magnets, which we looked at earlier on in this lesson, have the poles on each side.

So we have a look at this diagram here.

It's a little bit different to the diagram of the bar magnet because this magnet is a ring magnet.

So the shape is a little bit different, but we still have the north-seeking pole and we also still have the south-seeking pole.

So although the shape is different and the size may be different compared to the bar magnet, this ring magnet still has a north-seeking pole and also a south-seeking pole.

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

So Laura and Andeep are discussing bar magnets and what would happen if you cut one in half, Laura says you would get two magnets, but one would just have a south-seeking pole and one would just have a north-seeking pole.

Whereas Andeep is saying you would get two magnets and each of them would have a south-seeking pole and a north-seeking pole.

So I would like you to pause the video here and have a think about who do you agree with and why.

You might wanna to talk to your talk partner about this.

Or you also might want to write down some of your ideas.

So pause the video here, have a think and then we'll go through the answer shortly.

So the answer is, Andeep is correct.

So fantastic job everyone for thinking about both of those suggestions from those two children.

Andeep has said you would get two magnets and each of them would have a south-seeking pole and a north-seeking pole.

So all magnets have a north-seeking north pole and a south-seeking south pole.

If you cut a magnet in half, you get two magnets, not two halves of a magnet.

So fantastic work everyone so far.

There's lots of fantastic learning that we've been doing in today's lesson and we're now coming towards the end of our three topics within the today's lesson.

And the last topic for today's lesson is Earth is a like a giant magnet.

So if magnets can move freely, they can always point to the Earth's north pole.

So we've got our compass directions here and I wonder if you can remember the trick I taught you or I was taught when I was little to remember.

Did you remember?

It's never eat shredded wheat for north, east, south, and west.

So in the past, sailors used a natural magnet called lodestone to help them navigate.

Now what we mean by a natural magnet is that it's naturally occurring in the world.

That means it's not been made by humans, it's not been altered by humans, it's not been created by anybody, it's already here on our Earth.

They stuck a piece of load stone to a piece of cork and floated it in water.

The lodestone made the cork spin until it pointed north.

The sailors could then work out which direction they were traveling in.

These were the first compasses.

The needles on modern compasses are actually small magnets.

So we can see on the right hand side here picture of a modern compass.

Now compasses were discovered and created a long time ago, but these are the sorts of modern compasses we use today.

So we're now gonna talk about a significant person with magnets and William Gilbert was a doctor and scientist and we can see a portrait of him on the right hand side.

He lived from 1544 to 1603 now Gilbert was interested in magnetism.

So he really enjoyed learning about magnetism, had a really fantastic understanding of how magnets work.

Do you know what William Gilbert discovered?

Well, let's find out.

Gilbert realized that the reason magnets always point north is because Earth is like a giant magnet.

So we've got an image of Earth here.

He suggested that this was because Earth contains iron, which is a magnetic metal.

So we've done a little bit of learning about Earth is like a giant magnet.

So we're going to do a few questions now just to check our understanding.

So this first question says, if a magnet can move freely, which directions will it point to?

Option A, north.

Option B, south.

Option C, east.

Or option D, West.

So I'm going to give you a few moments now just to have a little think about which one of these could be the answer and then we'll go through the answer very shortly.

Amazing work everybody.

The answer is A, north and B, south.

So one end will face north and the other will face south.

So our next question is going to be a fill the gap question.

So it says fill the gap with the name of a metal.

So I'll read the sentence to you and I'll give you a few moments to think about what is the missing word.

William Gilbert realized that Earth is like a giant magnet because it contains ____.

So I'll give you a few moments now to think about what the missing word is.

Amazing work everyone.

It contains iron.

So we're gonna move on to task C now.

So make a compass like the ones that early sailors used and test it to see if it points north.

So the first step in doing this is finding north.

So use a walker's compass to find which direction is north.

Mark this on your desk with a sticky note just like in the diagram here.

So we need to mark where north is.

And the second part is I would like you to make a magnet from a steel pin.

Now to do this, you're going to use a bar magnet to magnetize a steel pin.

So if you stroke one end of a bar magnet down the entire length of the pin around 25 times.

You may need to ask an adult to help you with this.

You must use the same end of the bar magnet and you must stroke the magnet in the same direction each time.

So it's really important that you follow these instructions really carefully so that your investigation works.

And the third part of the investigation is to test your magnet.

So first step is using tape, stick the pin to the top of a cork.

So we can see a diagram here.

There is a steel pin stuck to cork and floating in a dish of water.

So part B is then float the cork in a dish of water and C is you're going to observe.

So we said look with our eyes, watch the cork spin until it stops moving.

So I would like you to pause the video here and test your magnet.

Off you go.

So I hope you had a great time testing your magnet.

So I would like to think about what you observed.

So I'm gonna talk for a few examples.

You may have seen something similar, you may have seen something a little bit different.

So Aisha here says, "The cork slowly turned in the water.

When it stopped, the needle was pointing north.

" Were your observations the same as Aisha's or were they a little bit different?

Maybe have a think if they were a little bit different.

Do you maybe know why did you do something different to the instructions?

Now we've come towards the end of our lesson and before we go through our summary, just want to say I'm so impressed with all of your learning today.

We've covered lots of different things within today's lesson, but you've all tried really, really hard and worked fantastically completing all of the tasks.

So I'm now going to go through the summary of all the things we've learned today.

So we have learned that magnets can be different sizes and shapes including bar, ring, button, and horseshoe.

So we looked at lots of different diagrams and pictures of different types of magnets and we learned that they're not all the same shapes and sizes.

We've also learned today that every magnet has two poles.

Scientists refer to the poles of a magnet as a north-seeking, which would see as north pole and a south-seeking pole, which we would see as an S.

Magnets always point north because Earth is like a giant magnet.

It contains iron, which has a magnetic force.

So that's the end of this lesson.

As I said, I'm so impressed with all your amazing learning and I look forward to seeing you in the next lesson.

Have a great day and I'm sure I'll see you very soon.

Bye-bye.