Lesson video

Hello, everybody.

My name is Mrs. Johnson.

I am so happy to be here today to help you with some of your maths learning.

I hope you're ready to work hard, and have lots of fun as we learn new things.

Let's have a look at what we're going to be learning about today.

This lesson is called, Temperature.

It comes from the unit, Sense of Measure.

By the end of this lesson, you will be able to explain what temperature means and read scales in the context of temperature.

Don't worry if you haven't heard of temperature before because we're going to learn all about it in this lesson and I'm here to help you.

There are some important keywords that we're going to practise saying to get us ready for learning in the rest of this lesson.

I will say each word first and then it will be your turn.

Ready? My turn.

Temperature.

Your turn.

My turn.

Thermometer.

Your turn.

My turn.

Degrees.

Your turn.

My turn.

Scale.

Your turn.

Good job.

Keep listening out for those words in this lesson, they are going to be really important to help you with your learning today.

There are going to be two parts to this lesson.

To begin with, you're going to look at understanding temperature, and then in a little while you're going to read and understand different scales.

Let's start with understanding temperature.

There are going to be two friends who are coming to help in this lesson today.

Their names are Jun and Aisha.

Listen carefully to the things that Jun and Aisha have to tell you, they've got lots of helpful hints for you today.

Here is Jun in the summer.

He says, "The weather is sunny.

I'm wearing a T-shirt and shorts to keep cool.

I'm wearing sunglasses and sun cream to protect me from the sun".

What do you wear in the summer? I wonder if you wear the same things as Jun or if you might wear something different.

You might wear a sun hat to protect your head and your face from the sun.

Here is Jun in the winter.

He looks different now, doesn't he? He says, "The weather is cold.

I'm wearing a thick coat to keep warm.

I'm wearing boots to keep my feet warm and dry".

What do you wear in the winter? Do you wear a scarf like Jun, to keep yourself nice and warm and wrapped up and cosy? Maybe you might have some special boots that have fur on the inside, or fleece, to keep your feet nice and warm.

When you are thinking about how hot or how cold something is, you are thinking about temperature.

The hotter something is, the higher its temperature will be.

Let's have a look at these foods.

Ice cream is at a lower temperature.

Then a milkshake, and then a sandwich, getting a bit warmer, and then a pizza, and then a cup of tea or coffee would be hot, so the pizza and the cup of tea or coffee are at a much higher temperature than the ice cream and the milkshake.

Temperature can be measured in degrees Celsius.

You can write this symbol.

It looks like a little circle at the top, and it means degrees, and then you write a capital C that stands for Celsius.

So altogether if you write that symbol, the little circle and the C, it stands for degrees Celsius.

You can use a thermometer to measure temperature.

I wonder if you've ever seen a thermometer before.

The coloured liquid that's inside the thermometer moves up and down.

It moves up when it gets hotter, and it moves down when it gets colder.

Jun can describe what it feels like when you are in different temperatures.

Keep an eye on the thermometer, because the thermometer's going to show you the temperature too.

"When it's 30 degrees Celsius, it feels very hot.

30 Degrees Celsius is too hot to play in the sun.

You might feel very hot and sweaty, when it is 30 degrees Celsius.

When it is 20 degrees Celsius, it feels comfortable.

You don't need to wear a coat or a jumper when it is 20 degrees Celsius".

Comfortable means you don't feel really, really hot, but you don't feel cold, it just feels nice.

That's what 20 degrees Celsius feels like.

Did you see the 20 degrees Celsius on the thermometer too? Let's see what temperature Jun is going to talk about next.

"When it is 10 degrees Celsius, it feels cool.

You would need to wear a jumper or a thin coat when it is 10 degrees Celsius." So it's not freezing cold, but it's cool.

You would need to put on a jumper or a coat, so that you don't get too cold.

Now, Jun is going to talk about when it is zero degrees Celsius.

Look at the thermometer now, it's gone all the way down to zero.

"When it is zero degrees Celsius, it feels very cold.

It could snow, or there could be ice on the ground.

You need to wear a thick coat, gloves and a hat".

I wonder if you can remember being in a temperature that could be about zero degrees Celsius before.

Maybe you've been out to build a snowman in the snow.

Remember how cold it feels to be in that temperature.

Let's check that you can see the temperatures on each of these thermometers.

Can you match the thermometer to the pictures of Jun to show which clothes you should be wearing in each temperature? Pause the video and have a go now.

Let's have a look.

The first thermometer is on zero degrees.

When it's zero degrees, it's very cold.

You need to be wearing a thick coat and a hat and boots to keep warm.

The second thermometer is on 30 degrees.

That's when it's really hot.

Jun would be wearing shorts and T-shirt and sunglasses when it's 30 degrees.

Well done if you've got those correct.

All thermometers have a scale.

It looks like a number line, and it helps you to measure the temperature in degrees Celsius.

On this thermometer, every line marked on the scale represents one degree.

But sometimes a scale doesn't have every number written on it because there's not enough room to fit all the numbers.

So you can see that not all the numbers are written on this scale, but it does have a line on the scale for every single number.

You could count in ones along this scale.

Let's have a go at that now.

Zero degrees, one degree, two degrees, three degrees, four degrees, five degrees, six degrees, seven degrees.

I wonder if you could keep counting along this scale.

How far could you get? Let's check that you can read the scale on this thermometer.

What temperature is shown on this thermometer? Is it 16 degrees Celsius, 17 degrees Celsius, or 18 degrees Celsius? Pause the video and have a think.

Well done if you said 17 degrees Celsius.

The coloured liquid is in line with the mark that's in between 16 and 18, and you know that the number that comes between 16 and 18 is 17, so that means that this thermometer is showing a temperature of 17 degrees Celsius.

Well done if you said that.

Now it's time for you to practise thinking about temperature.

First, you're going to look carefully at each thermometer, and write the temperature that each thermometer is showing in degrees Celsius.

Next, you're going to have a look at these clues and see if you can work out where each person lives.

You also need to look carefully at the map.

You can see that there are four cities marked on this map.

We have London, Manchester, Belfast, and Aberdeen.

The map also shows you the temperature that it is in each city.

Now, listen carefully to the clues.

Aisha says, "I live in the hottest place on the map." Andeep says, "It is 17 degrees Celsius where I live." Izzy says, "My city is cooler than London, but warmer than Belfast." And Jun says, "My city is warmer than Aberdeen, but cooler than Manchester".

Can you use the map and those clues to work out who lives in each city? You're going to pause the video and have a go at that now, off you go.

Well done, everyone.

Let's have a look and see how you got on.

On the first question, A is 10 degrees Celsius, B is 11 degrees Celsius, C is 28 degrees Celsius, D is 27 degrees Celsius, E is 13 degrees Celsius, and F is 25 degrees Celsius.

Did you practise writing the symbol for degrees? That little circle that sits at the top, and then a capital C for Celsius? Well done if you remembered to do that.

Now let's have a look and see who lives in each city.

Aisha lives in the hottest place on the map, which is London.

30 Degrees Celsius is the hottest temperature on this map, so Aisha must live in London.

Andeep lives in Aberdeen because he told us it was 17 degrees where he lives, and we can see on the map that it's 17 degrees Celsius in Aberdeen.

Izzy lives in Manchester, and Jun lives in Belfast.

To work out both of those, you needed to have a look at a few different cities, didn't you? Izzy said that her city was cooler than London, but warmer than Belfast.

That means it needed to be a temperature that was lower than 30 degrees, but warmer than 23 degrees, which is how we know she lives in Manchester because 26 is in between 23 and 30.

Jun said that his city is warmer than Aberdeen, but cooler than Manchester, so Jun's temperature must be warmer than 17 degrees, but cooler than 26 degrees, which means he must be 23, and he lives in Belfast.

Well done if you worked out all of those cities correctly.

Now it's time for the second part of the lesson where we're going to be thinking about how you can read and understand different scales.

Some thermometers can have different scales.

Have a look at all of these thermometers, what do you notice about the scales on these thermometers? Hmm.

I think there's quite a few different things you might notice here.

The scale on a thermometer doesn't always start from zero.

If you look carefully at the number at the bottom, three of these thermometers have zero at the bottom, but one of them starts from 10 degrees, so they don't always have to start from zero.

Something else you might have noticed is that scales can count up in different amounts.

We have scales here that are counting up in tens, and counting up in fives.

Jun says, "I think all of these thermometers show different temperatures because the red liquid is at different heights on each thermometer".

What do you think? Jun is right, that the red liquid is at different heights.

On some of the thermometers the red liquid is higher, and on some of the other thermometers, the red liquid is lower, but does that mean that they're all showing different temperatures? Aisha's not sure that's correct.

Let's have a look.

Aisha says, "It's really important to look at the scale when you read a thermometer, not just the height of the coloured liquid".

If we look carefully at these scales, we can see that all of these thermometers are showing the same temperature of 20 degrees Celsius, but because each one uses a different scale, the 20 is in a slightly different place, but on each thermometer, the red liquid is lined up with 20 degrees Celsius, so these all show the same temperature.

Let's check that you can spot which thermometer is showing the highest temperature here.

Do you think it's A or B? Pause the video and have a look.

The thermometer showing the highest temperature is A, even though the red liquid is lower down.

Remember that you need to look carefully at the scale on each thermometer.

A, shows 35 degrees Celsius, and B shows 34 degrees Celsius.

We know 35 is greater than 34, so A shows a higher temperature even though the coloured liquid is at a lower level than on thermometer B.

Well done if you spotted that.

We know that the scale on a thermometer can count up in different units.

Let's have a look at that a little bit more.

This thermometer has a scale that counts in tens.

We could say zero degrees, 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, we can count in tens.

This scale is different.

This has a scale that counts in fives.

We could say zero degrees, five degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees.

Maybe you could even carry on counting until you got all the way to the top of this thermometer.

This thermometer has a different scale again.

It does count up in fives, but this time not all the numbers are shown.

Let's count in fives along this thermometer.

Zero degrees, five degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, and you could carry on counting all the way up to 90 degrees at the top of that thermometer.

Let's check that you can read thermometers when the scales are different.

Look carefully at these thermometers.

Do you think this is true or false? These thermometers show the same temperature.

Is it true or false, and can you explain why? Pause the video and have a think.

Let's have a look.

This is true.

If you look carefully at each scale, you can see that they are both counting in fives, and so both thermometers show a temperature of 45 degrees Celsius.

Now, it's time for you to practise having a look at thermometers with some different scales.

First, you're going to write the temperature that is shown on each thermometer here.

Then you're going to colour the thermometers to match the temperatures that are written at the bottom.

Pause the video and have a go at that now.

Let's see how you got on.

When you needed to write the temperature on each thermometer, it's really important to look carefully at the red liquid to see which temperature it lines up with.

You should have 40 degrees Celsius, 15 degrees Celsius, 19 degrees Celsius, 25 degrees Celsius, 25 degrees Celsius again, even though it's in a different place it's the same temperature, because they've used different scales.

And the last one is 65 degrees Celsius.

Well done if you got those correct.

On the second question, you needed to colour the thermometers, so your colouring should look a little bit like these.

It's really important to try and be accurate and colour in exactly where each temperature would be on the scale.

Well done if you've done that.

Now that you're at the end of the lesson, you have learnt that temperature is a measure of how warm or cold something is.

It's measured in degrees Celsius, which we can write using the degrees symbol and a capital C.

You can use a thermometer to measure temperature.

You've learnt that some thermometers can have different scales.

It's really important to look at the scale when you read a thermometer, and not just look at the height of the coloured liquid.

Well done for all your hard work today, you've thought really carefully and learnt a lot about temperature and thermometers.

Good job.

I hope that I'm going to see you again soon for some more maths learning.

Bye, everyone.