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 are 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 Compare and Order Measurements of Volume and Capacity.

It comes from the unit Sense of Measure.

By the end of this lesson, you will be able to compare and order measurements of volume and capacity.

Don't worry if you are not sure about volume and capacity at the moment because we're going to be looking at that and learning about it together in this lesson.

These are the key words that we are going to need for the lesson today.

We're going to practise saying them.

My turn first and then your turn.

Ready? My turn.

Volume.

Your turn.

My turn.

Capacity.

Your turn.

Well done.

Listen out for those words, they are very important for your learning today.

There are going to be two parts to this lesson.

To begin with, you're going to compare different volumes and capacities.

And then in a little while you're going to order different volumes and capacities.

Let's get started with comparing.

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

Their names are Laura and Izzy.

Listen carefully to the things that Laura and Izzy have to tell you because they've got lots of helpful information that's going to be really important for your learning today.

Laura and Izzy are comparing how much orange squash they have in their cups.

You can see Laura's cup and Izzy's cup.

They both have some orange squash in their cup.

Laura says, "My cup is almost full.

I have more orange squash than Izzy." Izzy says, "My cup is almost empty.

I have less orange squash than Laura." When you think about the amount of liquid, you are thinking about volume.

Laura could say, "My cup has a greater volume of orange squash than Izzy's cup." Izzy could say, "My cup has a smaller volume of orange squash than Laura's cup." We could write this using a symbol.

We could say the volume of Laura's drink is greater than the volume of Izzy's drink.

We could say the volume of Izzy's drink is less than the volume of Laura's drink.

Now, Izzy and Laura compare some bottles of orange squash.

Laura says, "My bottle is smaller than Izzy's bottle." And Izzy says, "My bottle is larger than Laura's bottle." When you think about the size of a container, you are thinking about capacity.

Laura can say, "My bottle has a smaller capacity than Izzy's bottle." Izzy can say, "my bottle has a larger capacity than Laura's bottle." We can write this using symbols too.

The capacity of Izzy's bottle is greater than the capacity of Laura's bottle.

Or we could say the capacity of Laura's bottle is less than the capacity of Izzy's bottle.

Let's check that you know how to compare capacity.

Have a look at the picture and then see if you can use the words in the box to complete the sentences.

The bottle is almost mm, and the cup is almost mm.

The bottle is mm than the cup, and so it has a greater mm.

Capacity of the mm is less than capacity of the mm.

Pause the video and have a go at that now.

Let's have a look and see how you could have filled in all of these spaces.

The bottle is almost empty and the cup is almost full.

The bottle is larger than the cup, so it has a greater capacity.

The capacity of the cup is less than the capacity of the bottle.

Well done if you've got those in the correct places.

Laura and Izzy now pour some juice into different cups.

Laura says, "My cup is shorter and wider than yours." And Izzy has noticed that the juice is at the same level in each cup.

Laura and Izzy want to compare the volume of juice in these two cups.

Laura thinks that both cups will have the same volume of juice.

Hmm, I wonder what you think.

Izzy isn't sure.

She wants to think about how they could check the volume of juice in each cup.

Laura and Izzy could pour the juice into measuring beakers so that they could measure the volume of the liquid.

They're going to pour cup A and cup B into these measuring beakers so that they can measure the volume of the liquid.

We can see cup A and cup B.

We can see that the juice that was in cup A has a volume of 70 millilitres.

And the juice that was in cup B has a volume of 60 millilitres.

Laura says, I know that 70 is greater than 60 because it has more tens.

That means that the volume of liquid is greater in cup A than it is in cup B.

So we can say the volume of juice A is greater than the volume of juice B.

We could also write it using symbols.

We could say 70 millilitres is greater than 60 millilitres and 60 millilitres is less than 70 millilitres.

Now Laura and Izzy are going to compare the volume of liquid in these two yoghourt drinks.

We can see that the bottles look the same, but they have different volumes of liquid inside.

The strawberry flavour has 65 millilitres and the orange flavour has 90 millilitres.

Laura says, "I know that 90 is greater than 65 because it has a greater number of tens.

90 has nine tens, and 65 has six tens." The number with more tens will be the greater number, so 90 is greater than 65.

That means that the strawberry flavour has a smaller volume than the orange flavour.

So we could say that the volume of strawberry flavour is less than the volume of orange flavour, or the volume of orange flavour is greater than the volume of strawberry flavour.

We could also write the amounts using symbols.

We could say 65 millilitres is less than 90 millilitres, and we could say that 90 millilitres is greater than 65 millilitres.

Laura has found out some interesting information.

She says, "Did you know that a kitchen sink has a capacity of 35 litres?" I'm not sure that I knew that, did you? Izzy didn't know that, but Izzy has found out that her fish tank has a capacity of 53 litres.

So we have the capacity of a sink is 35 litres, and the capacity of a fish tank is 53 litres.

I wonder how we could compare these two capacities.

Laura knows that 35 is less than 53 because it has fewer tens.

Izzy knows that we could use greater and less than symbols to compare these capacities.

We could say that 35 litres is less than 53 litres, and we could say that 53 litres is greater than 35 litres.

Let's check that you know how to compare two measurements using a greater than or less than symbol.

Which of these are correct? Pause the video, look carefully, and have a go.

Okay, let's have a look and see how you got on.

42 litres is greater than 24 litres, that is true.

67 litres is less than 76 litres, that is true.

58 litres is greater than 85 litres.

No, it isn't, so C is not correct.

50 litres is less than 49 litres.

No, it isn't.

That one is not correct either.

Well done if you spotted that A and B were correct.

Let's have a look at comparing some more measurements.

A bucket has a capacity of five litres.

A teaspoon has a capacity of five millilitres.

They're both five.

The bucket and the teaspoon must have the same capacity then.

That's what Laura's thinking.

Do we think that sounds right? If they're both five, they must have the same capacity.

Hmm, I'm not sure.

Izzy's not sure.

She says, "Let's think carefully about how to compare these capacities." What does 5 l mean? It means that the bucket has a capacity of five litres.

And 5 ml means five millilitres, so these capacities are not the same.

One is five litres and one is five millilitres.

What can you remember about litres and millilitres? Hmm, let's have a look.

One millilitre is about the volume of a raindrop or a drop of food colouring.

One litre is about the capacity of a large carton of juice.

We know that both measurements are five, but one is in litres and one is in millilitres.

That means that five litres must be greater because one litre is greater than one millilitre, so five litres must be greater than five millilitres.

Now we can compare these capacities.

We can say five litres is greater than five millilitres.

Five millilitres is less than five litres.

We can also write this using symbols.

We can say five litres is greater than five millilitres and five millilitres is less than five litres.

Let's check that you are able to compare two volumes when the numbers are the same.

Have a look carefully and think about what is missing from each box.

Pause the video and have a go.

Okay, let's have a look.

90 millilitres is less than 90 litres.

90 litres is greater than 90 millilitres.

Now let's use our greater than and less than symbols.

90 millilitres is less than 90 litres.

90 litres is greater than 90 millilitres.

Well done if you filled in those boxes correctly.

Now it's time for you to practise comparing different volumes and capacities.

First, you need to write a greater than or a less than symbol in each box to make these correct.

Then you are going to think of your own ideas that you could use to complete the sentences on question two.

Once you've done that, you're going to choose a phrase from the box to be able to compare each pair of measurements.

You either need to choose less than, greater than, or the same as.

Once you've done that, you're going to have a think about this question.

You need to write one digit in each box so that each expression is correct.

Make sure you look carefully to see whether the symbol is a greater than or a less than symbol.

Finally, you're going to have a look at these two cups of water and think about this statement here.

Cup A has a greater capacity and a greater volume than cup B.

You need to decide if you agree or disagree and explain your reasons to a partner.

You are going to pause the video and have a go at that now.

Off you go.

Good work, everybody.

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

First, you should have said that the volume of water in a puddle is less than the volume of water in a river.

The capacity of a yoghourt pot is less than the capacity of a large pan.

The capacity of a mug is greater than the capacity of a teaspoon.

On question two, there are lots of different ideas that you might have had.

Here are a couple of examples.

We could say, the volume of drink in a full cup is greater than the volume of water in a raindrop.

We could say that the capacity of a bath is less than the capacity of a swimming pool.

I wonder what you thought of to write in each space so that those were correct.

Now, let's have a look at question three.

You needed to choose a phrase to compare each pair of measurements.

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

20 litres is greater than 20 millilitres.

15 millilitres is less than 15 litres.

67 litres is the same as 67 litres.

They've just written l for short, but l means litres.

Seven litres is greater than seven millilitres.

40 litres is greater than 40 millilitres.

60 millilitres is less than 16 litres.

Well done if you've got those correct.

Now, let's have a look at question four.

For this one there are lots and lots of different ways that you could have made these correct.

I'm going to show you one example.

You could say that 47 millilitres is greater than 34 millilitres.

18 litres is less than 81 litres.

We could say that 68 millilitres is less than 72 millilitres.

34 litres is greater than 29 litres.

75 millilitres is greater than 74 millilitres.

83 litres is less than 91 litres.

88 millilitres is less than 92 millilitres.

And 24 litres is greater than 19 litres.

You might have found some different ways that you could fill in these boxes, and that's okay, as long as you have thought carefully about whether the symbol is showing you greater than or less than.

On the final question, you needed to think about this statement, "Cup A has a greater capacity and a greater volume than cup B," and decide whether you agree or disagree.

You might have thought about something like this, cup A is larger than cup B, so I agree that cup A has a greater capacity.

That is true, cup A does have a greater capacity.

However, the second part of this statement about volume is a bit trickier.

The amount of water in cup A does look less than the amount of water in cup B, so I disagree.

I don't think that it has a greater volume.

However, just because the volume of water in B looks greater than cup a, it doesn't mean it definitely is.

We would need to measure the volume to check.

Well done for thinking really carefully about that one.

Now it's time for the second part of your lesson.

Now, you are going to be thinking about ordering volumes and capacities.

Now, Laura and Izzy have collected four different containers.

They're all empty, and they are all different shapes and sizes.

Laura is wondering which container might have the greatest capacity.

And Izzy is wondering how we might be able to put them in order of their capacity.

Wonder if you've got any ideas about that.

Let's have a look.

Laura says that we could fill one container with water and then pour it into another, and then we will know which container out of those two has the greater capacity.

Laura is going to fill up container A and then pour it into container B.

Here it goes.

Ooh, we can see that A has smaller capacity than B because the water that filled A has not filled B.

Can you see there's still a bit of space? The water isn't all the way up to the top.

Container B is not full.

That means that the capacity of A is less than the capacity of B.

Now, Laura's going to fill up A again, but she's going to pour it into C this time.

Let's have a look.

Ooh, this time all the water from A won't fit into C.

Can you see there's still some water left in the bottom of A, but C is full.

That means that C has a smaller capacity than A.

Now, Laura is going to pour C into D to find out if C has the smallest capacity out of all of these containers.

She's going to fill up C with water and pour it into D.

D is not full.

That means that C has the smallest capacity of all of these containers.

Laura has thought of another way that they might be able to order these containers by their capacity.

She's going to use another larger container to help measure the capacity of A, B, C, and D.

Izzy says, "Let's try it." Let's see what this is going to look like.

Here's the larger container.

They're going to fill up A and then pour it into the larger container.

Once they've poured the water in, they're going to make a mark to show where the water from A came up to on the jug.

Then they're going to pour the water away.

Now, they can do the same with the other three containers.

They're going to pour it in and make a mark.

Then take the water away.

Then do the next container, pour it in, make a mark, pour it away, and the last container, pour it in, make a mark, and take the water away.

Now, they can use the marks on the jug to be able to put the containers in order of their capacity.

If we look at the marks on the jug, we can see that C has the smallest capacity.

Then A, then B, and then D.

If we wanted to order them the other way 'round, we could say that D has the greatest capacity, then B, then A, and then C.

Let's see if you can put containers in order of their capacity.

Listen carefully to Izzy's clues and see if you can put these containers in order of their capacity, starting with the smallest.

Izzy says, "When I poured C into B, I couldn't fit all the liquid in.

When I poured B into A, A was not full.

A has the greatest capacity." Think carefully about those clues and see if you can put these containers in order of capacity, starting with the smallest.

Pause the video and have a go now.

Good thinking.

Let's see how you got on.

This is the correct order that the container should be in.

B has the smallest capacity, then C, and then A.

We know that B has the smallest capacity by Izzy's first clue.

When I poured C into B, I couldn't fit all the liquid in.

That means that C must have greater capacity than B, so B was the smallest.

We also know that A had the greatest capacity.

That was one of Izzy's clues.

So that's how we know that the order is B, C, A.

Well done if you were correct.

Now, it's time for you to have a practise at ordering different volumes and capacities.

You are going to choose five containers of your own, and you're going to see if you can place them in order from smallest to greatest capacity.

Izzy says, "You might want to use another larger container that you can draw marks on to help you order the five containers." And Laura says that you should try to choose containers that are different shapes and sizes so that you can really test out the capacity of each container.

Pause the video and have a go at that now.

Okay, let's see how you got on.

These are the containers that Izzy chose.

And Izzy says that she poured water from each container into a larger bottle, and she made a mark to show the capacity of each container, then she could put them in order.

So she marked A, B, C, D, and E.

Then she was able to say that the capacity of C is less than the capacity of E, which is less than the capacity of A, which is less than the capacity of D, which is less than the capacity of B.

You could have ordered the capacities of your containers this way too, or you might have found that you could pour the liquid between each container to help you find out which containers had the greatest and the smallest capacities.

Now that you're at the end of the lesson, you know that when you compare and order capacity, you're looking at how much liquid a container can hold when it is full.

When you compare and order volume, you're looking at the largest or the smallest amount of liquid.

You know that when the numbers are the same, you can use the unit of measure to help you compare measurements.

And when the units are the same you can compare and order measurements of volume and capacity in just the same way that you would compare and order two digit numbers.

You can use greater than and less than symbols to compare and order measurements of volume and capacity.

You've thought really carefully about how we can compare and order volume and capacity today.

Well done.

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

Bye, everyone.