Night and Day Nina and the Neurons: Earth Explorers

# If you've got a question and you don't know where to go

# Ask Nina for help cos she's got a science show

# She mixes all their senses by helping all her fans

# By doing her experiments with potions and with bangs

# Touch your tongue

# Fingers

# Eyes, ears, nose

# Nina and the Neurons find out what you need to know

# Nina and the Neurons find out what you need to know

# Luke helps us with our eyes and Felix with our touch

# Ollie sniffs out smells and scents and Belle she hears so much

# Bud is Ollie's brother he helps with our taste

# They're Nina's little Neurons and they're coming to your place

# Touch your tongue... fingers, eyes, ears, nose

# Nina and the Neurons find out what you need to know

# Nina and the Neurons find out what you need to know

# Oh yeah! #

Oh, hello there.

I'm just having my breakfast - some yummy cereal.

It's still early and the sun is just coming up.

SHE GIGGLES

BEEPING

I hear a beep, I see a flash. I wonder what they're going to ask.

BOTH: Hi, Nina.

Hi.

We've got a question for you.

Why do we have night and day?

That's a great question.

Why do we have night and day? It's daytime now.

Before that it was night-time and it was dark

and I was tucked up asleep in bed.

This'll be really exciting to explore.

Come down to my workshop and we'll investigate.

BOTH: See you soon, Nina. Bye!

Bye.

Well, I'm going to need some help to answer this one

and I know just who to ask. OK, Neurons, time to get to work.

ALL: Neurons at the ready, Nina.

OK, today's question is why do we have night and day?

Which Neuron do you think will be most useful in helping us

-find the answer?

-ALL: Me! Me! Me!

Will it be fabulous Felix?

I can help so much very much, if you need the sense of touch.

Will it be beautiful Belle?

I send messages to brain from ear.

If there's a sound I'll help you hear.

Will it be lovely Luke?

For looking and seeing, day or night,

I'll help you with your sense of sight.

Will it be awesome Ollie?

If it's pongy or whiffy but you can't tell,

my messages help your sense of smell.

Or will it be baby Bud?

Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat.

It's Luke!

Cool, Nina. I'll be looking out to help you.

Today's question is why do we have night and day?

Because we see when it's night or day, Luke, our sight Neuron,

will be helping us. But stand by, Neurons.

I have a feeling I may need help from all of you.

Right, I need to get the workshop ready before the explorers arrive.

Sophie loves cupcakes and Logan likes smoothies.

But they both want to know why do we have night and day?

The sun wakes me up in the morning.

I see stars at night time.

Why do we have night and day?

So today, for one day only, Sophie and Logan become the explorers!

-Hi, guys.

-BOTH: Hi, Nina.

Welcome to my workshop and thank you for your great question -

why do we have night and day?

To find out the answer, let's start by using our senses.

ALL: Whoop-whoo! A senses experiment.

We're ready, Nina.

Let's have a look at these two pictures.

So, which one of these is daytime?

-That one.

-Yeah, you're right.

And what does this picture show us?

Night-time.

That's easy, Nina - it's dark!

Exactly. At night-time we can't see the sun

and it's dark outside.

That's when we go to bed.

But in the day, the sun is in the sky and it's light outside.

So how does the sun go up and down?

Well, let me dim the workshop lights...

and we'll look at this model house to find out.

Now, we're going to pretend that this torch is the sun.

You should never look directly at the sun.

It's very dangerous for your eyes.

But because this is a pretend sun it's OK.

So, first thing in the morning the sun is shining from over here.

So have a look at the shadows, explorers. What do you notice?

-There's a big shadow at the back of the house.

-OK.

And in the middle of the day,

-can you see what's happened to the shadow?

-It's moved.

Yeah.

Let's see what happens to the shadows near the end of the day.

Ooohh.

-The shadow's at the front now.

-Well spotted!

So it looks as though the sun moves across the sky during the day.

Now I'll turn the lights back up.

Before clocks and watches were invented,

people used the sun to tell the time.

They would look at where the shadows were to find out

if it was morning, lunchtime or evening.

Lunchtime - that's my favourite time of day.

Well, Bud, you can tell it's lunchtime by using this...

a sun clock.

It's called a sundial and we'll see how it works if I dim the lights.

Put the torch on again.

So let's start in the morning, when the sun shines from over here.

-So, explorers, where's the shadow pointing?

-There.

-Yeah.

And now it's the middle of the day and the sun is shining from here.

So where's the shadow pointing?

-There.

-Yeah.

And now it's nearly night-time. The sun is setting.

-Where's the shadow pointing now?

-There it is!

That's right. And that's how people used shadows to tell the time.

That's marvellous, Nina.

So now we know we see the sun in the day when it's light.

But we don't see the sun in the night when it's dark.

The sun's light moves throughout the day, making shadows that move

-and change shape, too.

-Well remembered, Neurons.

The sun looks like it's moving but really the sun doesn't move.

We're the ones that are moving.

Let's go somewhere fun to find out more.

-Where do you think we're going today?

-Nina said it was somewhere fun.

I hope there's a picnic. Picnics are fun!

-It doesn't smell like food.

-Sharpen your senses, Neurons, we're here.

So far we've out that when it's daytime the sun is shining

and it's light.

And at night-time we can't see the sun shining, so it's dark outside.

And we also found out that it looks like the sun is moving

across the sky during the day.

But it's not the sun that's moving, it's us.

I can show you what happens with this fairground carousel.

We are going to pretend that this carousel is like planet Earth,

where we live. And here behind us is our pretend sun.

If that was really the sun, it would feel very hot, Nina.

And it would be MASSIVE!

At the moment, the sunshine is on this side of the carousel.

Now, Logan, I would like you to go and take a seat on the daytime side.

And over on the opposite side of the carousel...

..it's night-time, where we can't see the sun.

Sophie, I'd like you to sit on the night-time side. On you go.

This is just like planet Earth.

Half of the planet is in the light, and the other half is in the dark.

But it doesn't stay like that.

So how can we get Sophie into the daytime

and Logan into the night-time?

Well, let's see. OK, guys, here we go.

Now, Sophie, you can see the sun, so it's daytime.

And, Logan, it's night-time for you because you can't see the sun.

So let's keep going and if you see the sun shout, "Day!"

And if you can't see it shout, "Night!" Here we go!

-SOPHIE:

-Night!

-LOGAN:

-Day!

-LOGAN:

-Night!

-SOPHIE:

-Day!

-SOPHIE:

-Night!

-LOGAN:

-Day!

-SOPHIE:

-Night!

Day!

Well done, explorers, you were great at being the pretend planet Earth.

Now, when you were on the ride,

-did it look like the pretend sun was moving?

-BOTH: Yes!

I was watching the pretend sun and it didn't move.

It only looked like it was moving to you

because you were spinning around.

And the real Earth does the same thing, too.

And this is a model of the Earth.

Nina, the Earth is broken. It looks wonky.

It's not broken, Belle, it's tilted in real life,

exactly like this model.

And we live up here.

And the Earth spins like the carousel did.

And as it turns round,

we go from daytime...

into night-time.

And back round into daytime again.

From where we are on the Earth it looks like the sun's moving,

but it stays still. Just like our pretend sun stayed still

when you were moving around in the carousel.

The Earth spins and goes from daytime to night-time,

when people go to sleep.

SHE SNORES

So it looks like the sun is moving across the sky,

but it's really the Earth that is spinning.

Well remembered, Neurons.

# Nina and the Neurons. #

So, your question was, why do we have night and day?

And I think we've answered it.

When we can see sunlight, that's daytime.

When we turn away from the sun it goes dark,

and that's when we get night-time.

It looks like the sun is moving but it's not -

we're the ones that are moving.

-So I hope that's answered your question.

-BOTH: Thanks, Nina. Bye.

You're welcome. Bye!

If you want to know more about the science that's all round us,

go to the Nina section on the CBeebies website. Have fun!

# Every day the sun comes up

# It brightens up the sky

# A brand-new day to understand

# A chance to ask ourselves why? #

Why?

# There's a world of possibilities

# Outside our front door

# So every day take a look around

# And explore

# Explore

# Exploring in the garden

# Rocks

# Exploring in the park

# Rivers

-# Exploring in the daytime

-Mountains!

-# And even when it's dark

-Planets!

# Look at the Earth

# Look at the sky

# Look at the world before us

# Explore explore explore

# We're always on the lookout

# We're Earth explorers

-# We're Earth explorers

-Oh-oh

# We're Earth explorers. #

Remember, exploring is about looking at the world around us,

asking why, and finding out the answer.

So, whether it's deep underground, at the end of your playground,

or way up above the clouds,

let's keep exploring our exciting world. See you again soon. Bye!

ALL: Bye!

Subtitles By Red Bee Media Ltd