Stripy Rocks Nina and the Neurons: Earth Explorers

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

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

# She makes sense of her senses 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, he 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 us with our taste

# They're Nina's little Neurons 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!

These aren't mine. They're a present for a friend.

Some lovely stripy socks in a cool stripy box.

Beep! Beep!

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

-Hi, Nina!

-Hi, Nina!

Hi.

We've got a question for you.

Why are some rocks stripy?

That's a great question!

Why are some rocks stripy?

There are lots of different types of rocks,

some of them have stripes on them!

Come down to my workshop and we'll investigate.

ALL: 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 are some rocks stripy?"

Which Neuron do you think will be most useful

-in helping us find the answer?

-Me!

-Me!

-Me!

-Me!

-Me!

-Me!

Will it be fabulous Felix?

I can help so 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 are some rocks stripy?"

Because we can see stripes, Luke, our sight Neuron,

will be helping us today, but stand by, Neurons,

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

I need to get the workshop ready before the Explorers arrive.

Lilly Ann likes walking her dog Robbie,

Alfie loves motorbikes

and Christie loves lasagne!

They all want to know why some rocks are stripy.

Rocks look all different.

There's big, stripy rocks near my house.

Why are they stripy?

For one day only, Lilly Ann, Alfie and Christie become the Explorers!

Hi, guys!

ALL: Hi, Nina!

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

why are some rocks stripy?

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

Woo! A senses experiment! We're ready, Nina!

Let's have a closer look at these rocks.

-They all look different, don't they?

-Yes.

There are lots of types of rock and they all look

and feel different.

Some are shiny,

some are rough,

some are sparkly

and some are even stripy.

They're all different colours, too.

Let's play a game.

We'll see how many different colours of rock there are by sorting them.

-Ready?

-Yes.

OK, let's go!

That looks great. Well done, everyone!

Super quick sorting!

-What colours do we have?

-White.

Brown.

Yes! And there's also black, gold and purple.

And rocks are different colours because lots of them

are made of different minerals!

Minerals... I like the sound of that word.

Some rocks are made of minerals

and minerals are in lots of other things, too,

like sand and soil and even salt.

I've got some minerals here.

Minerals are made naturally in the world around us,

and they are all different colours,

but there are lots more of some minerals than others.

That's why it's easier to find a brown or a grey rock

than a blue or a yellow one.

Look, we have a stripy rock!

For a stripy rock, you need at least two different colours.

Each coloured part is made of a slightly different type of rock.

How are stripes made, Nina?

Let's go to a very special shop to find out.

Hmm, where do you think we're going today?

Nina said we were going to a very special shop.

Maybe we're going to a cheese shop to taste lots of yummy cheese.

And smell it, too. Cheese smells great.

Well, we're about to find out, guys!

So, in order to answer your question -

why are some rocks stripy? -

we've come to this very special shop... A sand shop!

So far, we've found out that rocks come in all different shapes, sizes

and colours, and that's because they're made of different minerals.

Different minerals make rocks different colours.

But now we want to find out how stripy rocks are made.

-Shall we go inside and do an experiment?

-Yeah!

-Let's go!

Here we have some little jars, and we're going to fill them up

with lots of different coloured sand.

Pick a colour and put a spoonful into the jar,

then pick another colour, and another,

until it's filled up right to the top! Let's fill!

Oh, Nina could make a multi-coloured sand castle!

Well done, everyone! These are great sand jars!

Look at all the different colours you've chosen.

-What do they look like?

-Stripy rocks.

-They do!

And each of these stripes is called a layer. Have a look at this rock.

Some rocks are made in layers just like the sand in our jars.

The layers of sand pile up on top of each other, and they get higher

and higher and higher, and all that sand is very heavy,

and, eventually, it gets squashed down into hard rock.

But we can still see the stripy layers.

Layered rocks like these are usually made near the sea,

where the waves wash the sand along and it piles up in layers.

-Now, which sand layer did you put in first?

-The bottom one.

-And which sand layer did you put in last?

-The top one!

Yes! And real stripy rocks are the same.

The layers of rock at the bottom were

there before the layers of rock at the top.

That means the layers of rock at the bottom are older than

the ones on top, cos they've been there longer.

Scientists can look at layers of rock

and find out what our world was like a long time ago.

Are the stripes always across, Nina?

Great question!

Let's get exploring to find out.

Now we want to know if stripes on rocks always go across.

Well, have a look at this cliff!

Wow! They're super, duper high cliffs!

I can only just see the top.

-Can you see the coloured layers?

-Yeah.

People have been coming to these cliffs for hundreds of years

to look at these colourful layers, but are the layers in this cliff

going the same way as the layers in our sand jars?

-No, they're going up!

-Well spotted!

The coloured layers in these cliffs are going up,

but the layers in our sand jars are going across.

In fact, it looks as if the ground has been tipped over like this.

Well, that's clever!

By tipping the jar over, the sand layers are now going up.

And there are lots of stripy cliffs that are tipped up like this

all over the world.

Ooh, I'm not sure I like the sound of that, Nina.

Don't worry, Belle.

It happened a very long time ago, and very, very slowly.

How did the cliff tip over?

Let's do an experiment to find out.

This is a special box, and we're going to see what happens

when we squeeze these stripy layers very tightly.

Here it goes!

Keep watching!

Look! The wall is moving inwards!

And squashing the sand together!

Oooh, that's a very tight squeeze.

What's happening to the layers?

They're moving.

Yes!

Because the stripy layers are being squeezed, they're moving,

and, in this part here, the squeezing has tipped the layers up.

-What way are they facing now?

-Upwards.

-Yes!

The stripes are no longer going sideways, they've tipped upwards!

And this is what happened to these stripy cliffs, too.

The ground is always moving very, very slowly,

and, over millions of years, they got squeezed,

and they tipped over, so the stripes were facing upwards.

So, your question was, "Why are some rocks stripy?",

and I think we've answered it!

Stripy rocks are made by sandy layers building up, one on top

of each other, and squashing together to become hard rock.

The layers are the bottom were put down before the rocks at the top.

The ground is always moving very, very slowly.

And a long, long, long time ago, over millions of years,

the rocky layers got squashed and tipped upwards.

That's a lot of squeezing and squashing!

So, I hope that's answered your question.

ALL: Thanks, Nina. Bye!

You're welcome. Bye!

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

-explore,

-explore

-explore

-# Exploring in the garden

-Grass!

-# 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,

-explore

# We're always on the lookout

-# We're Earth explorers...

-O-oh o-oh

-# We're Earth explorers

-O-oh o-oh

# We're Earth explorers. #

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

asking why and finding out the answer.

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

or way above the clouds, keep exploring our exciting world.

See you again soon. Bye!

ALL: Bye!

Subtitles by Red Bee Media Ltd