Lesson video

Hi, everybody, Ms. Hill here.

Today, we are going to be interpreting reading and comparing time graphs.

I really hope you're looking forward to this lesson.

So, put on your hats , tighten those ties , and tell the computer, "Now I'm a mathematician".

Great, let's get started.

For this lesson, you are going to need the following resources.

You are going to need a pencil, a piece of paper, and a ruler.

If you need to get any of those things, please pause the video now and go collect them.

Great.

Let's get started.

So here is our lesson agenda today.

We are going to do our star words before looking at graphs and thinking, "What's the same, what's different?" We're then going to be looking at the graphs and answering questions before moving on to the end of lesson task.

So here are our star words.

So today we're looking at time graphs.

We're going to be comparing them, we're going to be reading the scales, we're going to be looking at data, we're going to be reading the axes, the horizontal axis and the vertical axis.

So here we have a time graph.

Now this is showing temperature in New York on one day, which is Saturday.

Along the horizontal axis, you can see the times.

They go from 0:00, which is 12 o'clock, or midnight, to 3:00 AM.

6:00 AM, 9:00 AM, 12:00 AM, sorry, 12:00 PM, 3:00 PM, 6:00 PM, 9:00 PM, and then midnight again.

So the scale is going up in three hours at a time.

Now on our vertical axis, you can see it goes up in increments.

So we have zero, then we have an unmarked line, which is two, then four, another unmarked line, which is six, then eight, another unmarked line, which is 10, 12, 14, 16, 18, 20, 22, 24.

Now on this scale we can see there are lots of little crosses.

So on this graph there are lots of little crosses.

We can see at midnight, the cross is over here, it's between six and eight, so it was seven degrees Celsius.

At 3:00 AM, it dropped down to six degrees Celsius, at 6:00 AM, it went up to eight degrees Celsius, and at 9:00 AM, it jumped all the way up to 11 degrees Celsius.

So here we have two charts.

We have our time graph and our bar chart.

What's the same? What's different? Have a think.

Hmm.

Well, they both have an axis and they're both labelled.

So we have our temperature on the time graph, and we have the number of people on the bar chart.

And we have our times and our options along the bottom.

So they both are showing data, but they are both showing very different data.

The time graph is showing us temperatures of a certain time during the day, and then our bar graph is showing us the number of people that preferred different New York attractions.

Do I know anything about the temperature here? So, we can see that our crosses are going up in a curve.

So the time here, so I would say this is about one o'clock or two o'clock.

So what you need to do is carefully look up and then across, and the temperature is between 11 and 12 degrees.

So what was the temperature at 6:00 PM, or 18:00? Have a look, read it carefully.

So I know, do you know? Whisper it to me.

Perfect.

It was nine degrees Celsius.

Can you estimate the temperature at 1:30 or 30:30? Let's do it together.

To find 13:30, draw a line up, and across.

We can see it's starting to go down.

So what do you think? Yeah, I would say the same.

It's around 11, 11 degrees Celsius is an estimate.

What was the temperature at 09:00? Great job, it's 11 degrees again.

Can you estimate the temperature at 11 o'clock at night? What you need to do, have a look.

Ooh, I think it will be about - whisper it to me? Great job, eight degrees.

When did it start to get cooler? Now this we need to look for when the crosses are starting to go down.

And I can see it's starting to get cooler, I would say between 12 to three o'clock.

So anyway, from 12 til three it's starting to get cooler, wasn't it? When was it the hottest recorded time of the day? How do you know? So for this one, we need to see, we need to read our temperature, which is on our vertical axis.

And we need to find the hottest temperature recorded.

And I can see that it's 12 degrees Celsius.

And if I go along and then down, I can see that recorded at mid-day.

So the hottest recorded time of day, it was at 12 o'clock and it was 12 degrees Celsius.

Now the coldest time of day, we need to go back up our vertical axis and look for the coldest time, coldest temperature recorded, which was six degrees.

Now, what time is that? Have a look.

It was 3:00 AM in the morning.

So the coldest temperature was six degrees, and that was at 3:00 AM in the morning.

When was it starting to get warmer? So when did it start going up? When did that trend start to go up? Now I can see a time.

What time does it start going up? Well done.

It did indeed start getting up at 3:00 AM.

Cause you see between three, and six, it went up by two degrees.

And when was it start getting cooler? Well, we've done this one.

Between 12 and three.

You can see it starting to go downwards again.

When was it 10 degrees? Now let's have a look.

Hmm, go up your vertical axis and look for 10.

Remember it's unmarked, it's between eight and 12.

Great job.

Go along, and up.

What was the time? Great job.

15:00, or three o'clock.

And what was the temperature at six o'clock? Go to six, go up and across, it was nine degrees.

Well done.

It's just before that increment, just before 10.

Great job, everybody.

Well done.

That was your first reading of some time graphs.

So, using the information from the time graph, you need to answer these eight questions.

So what you need to do is to pause the video, read carefully through the questions, and answer them.

Great job, everybody.

Let's go through the answers together.

At what time is the temperature six degrees? It was six degrees at 3:00 AM.

What was the temperature at eight o'clock? It was 11 degrees.

What was the difference between the hottest and coldest part of the day? Six degrees.

Was it warmer at 9:00 AM or 9:00 PM? It was warmer at 9:00 AM.

What was it colder at 10 o'clock or 14:00? It was colder at 14:00, or 4:00 PM.

What was the difference between the temperature at 6:00 AM and at 9:00 AM? There's a whole three degrees different.

And when was the temperature lower than eight degrees? When was it lower? And that's between midnight and 5:00 AM, because remember we're doing it's lower than.

When was the temperature higher than 10 degrees? And that was from 9:00 AM to 14:00, or 2:00 PM, because you remember it needs to be higher than 10 o'clock.

Well done everyone.

Give yourselves a big ♪One, two, three, well done, me! ♪ Lovely job.

If you'd like to, please ask your parent or carer to share your work on Twitter, tag @OakNational and #LearnwithOak.

I look forward to learning again with you soon.

Bye guys!.