Lesson video

Hi everyone, and welcome to another science lesson with me Miss Emms. Now, I'm really looking forward to teaching you this lesson, because we are going to learn about something really exciting and interesting called constellations.

Your turn.

Amazing, well done everybody.

Now, the key question today is, what are constellations? And if you haven't accessed the first few science lessons of this unit on space, then you need to do that before we do this learning on constellations.

So you should've done an introductory lesson about space, followed by a lesson about the planets, then the lesson about the Earth orbiting and rotating and finally, this lesson about constellations.

If you need to pause the video because you haven't done those lessons, then that's absolutely fine.

Okay, let's get started.

In this lesson, we've started off with a start of lesson quiz and you should've had a chance to complete that before this video.

If you haven't, you need to press, Exit Video or Close Video and go back to complete your start of lesson quiz.

Do that now if you need to.

Great, after that we're going to learn about stars and then we're going to learn about the temperature of stars.

After that, we're going to learn about constellations and what that means.

And finally, you're going to have a go at completing an end of lesson quiz, where you're going to be asked some questions about today's learning.

So make sure you're listening really carefully.

Okay, you'll need in this lesson, an exercise book or paper.

In this lesson, it's great if you've actually got some plain paper as well as lined paper, but don't worry too much if you haven't.

You will need a pencil and you will need your brain to be working very hard.

If you need to go and get your exercise book or paper or your pencil, then go and get those now.

Pause if you need to.

Fantastic, well done.

Okay, so a quick recap.

We learned about all of the planets and we learned about each of them.

Let's see if you can remember.

So you've got Mercury.

Your turn.

And Mercury is very? Hot, well done.

Venus is very? Bright.

The Earth is where we? Live.

Mars, what colour is Mars? Red, Jupiter is a very? Wide.

Saturn has a very big ring.

Uranus, what does Uranus do? It spins on its side.

And Neptune is very? Windy, well done.

We also learned about the Earth's orbit and we learned that the Earth takes 365 days to orbit the sun.

We also learned that seasons change depending on where you are and whether where you are on the Earth is tilted towards or away from the sun.

We learned that when it's summer where you live, your part of the Earth is tilted towards the sun.

And when it's winter where you live, your part of the Earth is tilted away from the sun.

Okay, let's have a look at our star words.

Are you ready? Star words, star words, star words.

Amazing, stars.

Your turn.

Temperature.

Constellations.

Let's practise using that vocabulary one more time and then we'll find out what they mean as we go on throughout the lesson.

Stars.

Temperature.

Constellations.

Great job.

So let's have a think now about stars.

I wonder if you've seen stars before in the night sky? Can you nod if you have? You might notice that when it's a clear sky with not very many clouds, that you can see lots and lots of stars in the sky.

Here is an amazing image of lots and lots of stars up in the night sky.

Okay, so here you can see a picture of lots of stars.

Now, stars are made of hot gases, okay? And the hot gases are held together by the stars' gravity.

So stars are made of hot gases.

And on a clear night, you can see about 3000 stars in the sky, but actually there on many, many more than that.

You can see roughly 3000 stars on a clear night sky.

I wonder, as quick recap questions, can you remember what stars are made off? Tell your screen, stars are made off? Great, they are made of hot gases.

And can you remember roughly how many stars you can see in a clear night sky? Did you get it? 3000, you're right.

But we know that there are many more.

So it takes roughly eight minutes for the light of the sun to reach the Earth.

It takes roughly eight minutes for the light of the sun to reach the Earth.

Now, we are going to think carefully about the temperature of stars and it might be opposite to what you really think, 'cause sometimes we think of red as a really hot colour, but stars have different colours dependent on their temperature.

The hottest stars are blue, okay? And the coldest stars are red.

Stars that have an in-between temperature are white.

So you can see that the scale sort of goes like this.

You've got the hottest stars being blue, getting to a lighter blue and then a white and then the coldest, getting colder, we've got yellow, getting even colder, orange and then the coldest stars are red.

I wonder now, if you can draw this table in your book or on your piece of paper, just to check your understanding of the temperature of the stars.

So you're going to fill in the table using your knowledge of the temperature of stars from the previous slide.

So the hottest stars are what? Middle stars are which colour? What you need to write here if you know that it's white and the coldest stars are what colour? Either you can write in the colour or if you've got some coloured pencils, you can draw this table and actually colour in the circle, so you know which colour each temperature star is.

Okay, pause the video now to have a go at competing this task.

Fantastic, well done everybody.

So let's recap.

You should've had your hottest star as blue, okay? A sort of darkish blue colour, the hottest stars.

So give yourself a tick if you've got the hottest star as blue.

Here we know that this star, sort of the whitish colour, has an in-between temperature.

So you could have written in-between hot and cold or a middle temperature, in-between.

And finally, the coldest star is what colour? Tell your screen.

Red, you are so right.

The coldest the star is red.

If you need to tick or fix your table, then you can pause the video now to tick or fix.

Okay, fantastic, let's move on.

So.

Now, stars are arranged in what are called constellations and that's when we sort of draw imaginary lines to link stars and they create certain shapes, okay? So the lines aren't really there, but if we think about imaginary lines then the stars are connected and they create certain shapes.

You might sometimes have looked up into the night sky and thought, oh, I think that group of stars looks like a, I think that group of stars looks like this object or that object and you're right.

There are different constellations.

Your turn, constellation.

There are 88 constellations of stars in the night sky.

So 88 groups of stars that are sort of connected by imaginary lines.

All right, 88 constellations.

We're going to have a go at drawing some of our own constellations.

So I would like you quickly to tell your screen, what is a constellation? A constellation is? Pause the video and tell your screen.

You're right, a constellation is a group of stars and it's linked by imaginary straight lines between them so it looks like they form certain objects.

We're going to have a go at doing something fun before we draw one of the main and most famous constellations.

I want you to draw on a piece of paper.

I want you to draw an outline, so you don't need to colour it in, just the outline of your favourite animal.

So take a minute now to think, just think about what your favourite animal is.

You got it? On a piece of paper, you're just going to draw an outline of your favourite animal.

Pause the video to do that now.

Amazing.

And now, is it for creating a constellation? I wonder with your pen or your pencil, can you go around and draw a few stars around the edge of your animal along the lines that you've drawn? They don't have to be straight.

And that is going to look like a constellation.

Not one that we can see in the night sky, but it helps us to understand what a constellation looks like.

Now let's have a go at drawing one together.

So what we're going to do and I'm going to show you my piece of paper now.

There is one very famous constellation and it's known as the Big Dipper.

What's it known as the? Great, the Big Dipper.

This is a bit tricky to do, but I wonder, perhaps if you can have a go at doing this as well? Maybe I'll do it first, you can watch and you can help me and then you can have a go by yourself.

So I've written my title, The Big Dipper and I've drawn my seven dots that form my dot-to-dot.

One, two's almost next to it, two, down a bit, three, four, five, six and seven and I'm going to join them up with straight lines to form my constellation.

So I'm going to do it in a different colour.

Drawing one and two.

Drawing two and three, well done.

Then I'm going to join three and four, four and five, five and six and six and seven.

Mm, what do you think this looks like? What do you think this looks like? You could have lots of different ideas.

Tell your screen what you think it looks like.

In all it's known for almost looking a little bit like a pan or some sort of something that you could drink from, some sort of container with a handle and then the main part here.

I wonder if you can have a go now? So the step, looking carefully at mine, is to draw your dots and number them and the second step, either with a different colour or with the same colour, is to join your dots to form your constellation.

Then you're going to write the key word, constellation.

Constellation, next to your constellation.

Pause the video and have a go at doing that now.

Fantastic, well done everybody.

Let's go back to our slides.

Okay.

So we'll need to have a think now, how do you think constellations might be able to help people? Why might they be useful? Why might they be useful? Pause the video and tell your screen what you think using the sentence starter, constellations might be useful, because they? Pause the video and tell your screen.

I wonder if you've got the idea that constellations might be useful, because they used to help people navigate.

It can help people navigate, because you know where you are in relation to certain constellations in the sky.

So for navigation.

That means sort of getting directions and knowing where you're going.

Okay and after this lesson, it's going to be time for your end of lesson quiz.

Great job today and if you'd like to share what you've learned, then you can ask your parents or carer to share work on Twitter @OakNational with #LearnWithOak.

Amazing learning and I will see you next time.

Bye, everybody.