【臺詞】Do You Know S1-03 Fizzy Water and Yoghurt

【臺詞】Do You Know S1-03 Fizzy Water and Yoghurt

2級Do You Know S1-03a Fizzy Water1人有 · 評價1 · 書評1 Do You Know S1-03a Fizzy Water ????250620 看2小段s1-3。 ■這段之前裸聽了幾次這把終于看上了。

2級Do You Know S1-03b Yoghurt1人有 · 評價1 · 書評1 Do You Know S1-03b Yoghurt ????250620 看2小段s1-3。

Hello, I'm Maddie. And today,

I'm going out for a nice long walk.

I don't know about you,

but when I go on a long walk,

I like to take a few things with me.

What do you take?

I've got some snacks in here.

A juicy apple

and a drink.

Fizzy water. It's one of my

favourites.

PFFT!

Oh! I love that sound.

And did you see how all the bubbles

rose to the top

when I opened the bottle? But how do

the bubbles get into the water?

Do you know how fizzy water works?

Let's find out.

To show you how fizzy water is made,

I've come to a fizzy water factory

where they produce around two

million bottles of water every day.

The water is stored inside these

tanks before it goes into

the factory to get its bubbles.

But where does the water come from?

The water comes from this spring,

where rainwater has collected

underground for thousands of years.

It bubbles up to the surface and it

sent through pipes into the factory.

And it's sent to something

called the chiller.

The chiller cools down the water

so that it's nice and cold

before it gets put into bottles.

But the water inside the chiller

looks like this.

It's still, which means it doesn't

have any bubbles.

It's not fizzy like this one.

So, how does still water become

fizzy water?

It's time for some bubbles!

The still water is made fizzy by

these two tanks.

This tank is called

a carbonation tank.

It makes the water fizzy by pushing

a gas called carbon dioxide

into the water.

Here's how it works.

Water contains a gas called oxygen.

To make the water fizzy,

we need to remove the oxygen.

Inside the tank is a metal plate

with holes in it, like a sieve.

The holes are so small that,

as the water squeezes through them,

the oxygen gas escapes.

And it's taken away through

a vent at the top of the tank.

Bye-bye, oxygen!

Now the oxygen is removed,

we can make the water fizzy.

The water, with no oxygen in it,

is sent to the second big tank.

Here, carbon dioxide gas is pushed

into the water very, very fast.

As more and more carbon dioxide

bubbles fill the tank of water,

pressure builds up.

This makes the bubbles

dissolve into the water

so that we can't see them any more.

And now, the water is fizzy.

The pressure is like

a balloon ready to burst,

and it stays like this as the water

is put into bottles.

We only see the bubbles again when

the bottle is opened.

The pressure is released,

we hear a big fizzing sound,

and the bubbles rush to the surface.

Clever, isn't it?

Let's use my special camera

to get a closer look at the

carbonation tanks.

So, the cold, still water comes in

from the chiller,

through the pipe, and into this

first tank.

And inside here, all of the oxygen

is sieved out.

And then it goes into this

second tank,

and in the second tank the water

gets its bubbles.

The carbon dioxide goes in

through this pipe just here,

and it's squeezed and squeezed into

the water until all of the

bubbles dissolve, and then, when

it's fizzy,

the water comes out of the tank,

goes through this pipe,

off to get put into bottles.

And this is where the bottles are

filled with water.

Look how fast the bottles fill

up with the water!

So this is a finished bottle

of fizzy water.

I can't see any bubbles, can you?

Shall we let the bubbles out?

PFFFFT!

Oh! Ha-ha! 'Did you hear that?

Let's hear it again.'

PFFFFT!

'What a brilliant hissing sound.'

As I undid the lid all of the

gas was released,

and they bubbled up to the top.

Let's use my special camera to slow

things down and watch it again.

This camera films in slow motion,

which means that when I

open the bottle, the bubbles of gas

will be released and we can see it

happening really slowly.

So, let's press record.

Are you ready?

Can you see there are no bubbles

until I open the bottle.

And then thousands of tiny bubbles

rush to the surface.

Now THAT was brilliant.

All of those little bubbles,

you can still see them,

those bubbles of carbon dioxide gas

were just waiting to be released,

and as soon as I undid the

lid, they certainly were!

They're still going!

What was your favourite bit about

seeing how fizzy water works?

Do you remember the name of the gas

that makes the water fizzy?

That's right - it's called

carbon dioxide.

Did you hear the sound the bottle

made when I opened it?

PFFFFT!

Oh! Ha-ha!

And did you see the way the bubbles

go up inside the bottle

when I used my special camera?

So, the next time you have some

fizzy water, you'll know how the

bubbles got inside and how they stay

hidden until you open the bottle.

Now, it's time for a snack.

Ooh - I could have a yoghurt.

Yum. Strawberry yoghurt.

I like yoghurt. Do you?

But, do you know how yoghurt is

made?

Where does yoghurt come from?

Let's find out.

The first things we need to make our

yoghurt are just in here.

Lots and lots of cows.

All yoghurt is made from milk,

but the yoghurt we're going

to see being made today comes

from cows' milk.

So, to see yoghurt being made,

first, we need some milk.

All these cows are about to

be milked,

which means their milk is

collected from their udders.

And you can see their udders

underneath the cows.

Can you see Rich, the herdsman?

He's attaching a special pipe to the

cows' udders.

This is called a cluster,

and it gently sucks the milk from

the cows udders and takes it

down this pipe to this plastic tub

called a milk meter,

which measures the amount of milk

the cow produces.

And once they're finished milking,

the clusters just fall off

and the cows head back to the barn.

Mooooo!

In one day, a single cow can make 21

pints of milk.

That's 21 of these.

That's enough for 70 bowls

of cereal.

But how does milk turn into yoghurt?

Once the milk has been collected,

it's taken to the factory in

a lorry and stored in huge tanks

called milk silos.

The milk is then taken from the

silos into the factory to be

made into yoghurt.

The first stage is for all the

ingredients to get mixed together.

And that happens here,

in the mixing room.

Yoghurt is made from milk, cream,

some milk powder,

and a bit of sugar.

And once they're mixed together,

they get sent on to the

next part of the factory.

The next stage happens in here,

and it's very noisy.

MACHINES WHOOSH AND WHIR

Look at all those pipes.

All the ingredients that have now

been mixed together are heated up.

This is called pasteurisation,

and it gets rid of any bad bacteria

that could be in the milk.

Once it's reached the right

temperature,

the pasteurised mixture is moved

into one of these.

They're called incubation tanks,

and they are huge.

Now a special ingredient is added.

And it will turn the milky

mixture into yoghurt.

The special ingredient is called

a starter culture,

and it's made of a mix of

good bacteria.

Bacteria has to be kept in the

freezer, because as soon as

it gets warm and is put in the

incubator, it starts to multiply.

The starter culture is added to

the yoghurt

and then left to get to work.

And when it's added to the milky

mixture inside this

incubation tank, it starts

to multiply.

This means that two good bacteria

become four, four become eight,

and eight become 16, and so on,

until you have lots of good bacteria

mixed in with the milk.

Inside this incubator, the yoghurt

has already been mixed,

so lets use my special camera to

take a look.

Whoa! It's so thick and creamy.

All of that good bacteria has

multiplied and multiplied,

which has made everything

really thick.

It's turned it into yoghurt.

The yoghurt is cooled down to stop

the bacteria multiplying any more.

And it's piped to a smaller tank.

This is plain, natural yoghurt,

and it's lovely on its own.

It's great for cooking, you might

have even had it on muesli at home.

But sometimes it's nice to add

a bit of flavour.

What flavour yoghurt do you like?

Do you like peach?

Blackcurrant?

Let's see what flavour this

yoghurt's going to be.

This is strawberry puree,

and it's going to turn the plain

yoghurt into strawberry yoghurt.

My favourite.

The mixer turns the yoghurt and

fruit puree into

a lovely pink colour.

It's now time for the drop test.

And this is where the team check

that the yoghurt is the right

thickness.

If the yoghurt is thick enough,

it's ready to go into pots.

The machine works so quickly.

One dollop of yoghurt in every pot.

And look how many pots there are.

This factory could make over a

million pots of yoghurt a day.

I love the sound of the lids being

glued down onto the pots.

It sounds like a train going

over tracks.

CLACKETY-CLACK! CLACKETY-CLACK!

And here we go, a finished pack

of yoghurt.

Just like you'd see in the shops,

or maybe even in the fridge at home.

What was your favourite part about

seeing how yoghurt was made?

Do you remember what part of the cow

the milk comes from?

That's right - it's the udder.

Did you hear the sound of the lids

being pressed onto the pots?

CLACKETY-CLACK! CLACKETY-CLACK!

And did you see how the bacteria

thickened the yoghurt?

So, the next time you tuck into

a tasty yoghurt,

you'll know that it started out as

milk that came from a cow.

Thank you, cows!

And, now you know how the bubbles

get into fizzy water.

I'll see you next time.