Rattling Pan Nina and the Neurons


Rattling Pan

Scientist Nina and her young experimenters discover how substances change and react. They investigate why the lid on a soup pan rattles when the pan is heated.


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Transcript


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

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

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# She makes sense of her senses While helping all her fans

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# By doing her experiments With potions and with bangs

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-# Touch your tongue

-Tongue!

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-# Fingers

-Fingers!

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-# Eyes.

-Eyes!

-Ears.

-Ears!

-Nose.

-Nose!

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

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

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# Luke, he helps us with our eyes And Felix with our touch

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# Ollie sniffs out smells And Belle, she hears so much

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# Bud is Ollie's brother He helps us with our taste

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# They're Nina's little neurons And they're coming to your place!

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-# Touch your tongue

-Tongue!

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-# Fingers

-Fingers!

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-# Eyes.

-Eyes!

-Ears.

-Ears!

-Nose.

-Nose!

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

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

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# Oh yeah! #

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Oh, hello.

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I'm experimenting with sparkling water.

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Now watch this.

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The raisins are dancing with the bubbles!

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-BEEPING

-I hear a beep, I see a flash.

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I wonder what they're going to ask.

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ALL: Hi, Nina.

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Hi, guys.

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-We've got a question for you.

-Why does the lid on the soup pan rattle?

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That's a great question. Why does the lid on a soup pan rattle?

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I've noticed that, too. I wonder what causes it.

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Why don't you all come to my lab and we'll do some experiments.

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-ALL: See you soon, Nina! Bye!

-Bye!

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I'll need help to answer this and I know just who to ask.

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OK, Neurons, time to get to work.

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ALL: Neurons at the ready, Nina.

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OK. Today's question is, why does the lid on a soup pan rattle?

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Which Neuron will be most useful to help find the answer?

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ALL: Me! Me! Me! Oh, me!

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Will it be fabulous Felix?

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

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will it be beautiful Belle?

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I send messages to brain from ear. If there's a sound, I'll help you hear.

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Will it be lovely Luke?

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For looking and seeing, day or night,

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I'll help you with your sense of sight.

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Will it be awesome Ollie?

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

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-my messages help your sense of smell.

-Or will it be baby Bud?

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

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It's Belle!

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NEURONS: Go, Belle! Go, Belle! Go, Belle!

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Go, Belle! Go, Belle! Go, Belle! Go, Belle!

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Brilliant. I'm all ears, Nina.

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Today's question is, why does the lid on a soup pan rattle?

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To listen to the rattle, we use our hearing,

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so Belle will be helping me. But stand by, Neurons.

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I may need help from all of you.

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I'd better heat some soup up before the Experimentors arrive.

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Jake likes sports,

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Poppy loves horse riding

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and Josh loves cars

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but they all want to find out about rattling pans.

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So, for one day only, Jake, Poppy and Josh become the Experimentors!

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-ALL: Hi, Nina.

-Welcome to my lab. Come in.

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It's lovely to see you all.

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You asked, why does the lid on a soup pan rattle?

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But why do you want to know?

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My mum cooks soup at home. The lid really rattles.

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But we want to know why.

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My pan lid rattles, too, when I make soup,

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which you can probably hear. I think we need to investigate.

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For our first experiment, we'll use our senses.

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ALL: Whoop-whoo! A senses experiment! We're ready, Nina.

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For safety, you're standing well back

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-because this soup is very hot.

-Hot things can be very dangerous.

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Let's listen carefully.

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-What can you hear?

-It's rattling.

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It's that noise, Nina. It's quite tinny. T-t-t-t-t-t.

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Hm. Now what can you see?

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The lid seems to be shaking.

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It's moving up and down.

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Yes, the lid's moving up and down a tiny bit.

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I want to look inside, but it's very hot,

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so I'll put on my heatproof gloves.

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Whoo.

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And this here is my NinaCam.

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If I hold it over the top of the soup,

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-you can see what's happening inside.

-Soup. Mmm. That smells delicious.

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-So what can you see and hear now?

-EXPERIMENTORS: Bubbles.

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Yeah.

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What a brilliant noise!

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That's right. The bubbles are quite noisy.

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Let me just turn this off...

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OK.

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What can you see now?

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The bubbles are gone.

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That's right. The soup isn't bubbling any more.

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And...what about the pan lid?

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It's stopped going up and down.

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Right. We could hear the lid rattling, see the soup bubbling

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When I switched the Bunsen burner off,

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the bubbling and rattling stopped. That's interesting.

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Time for another experiment.

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My NinaCam showed us lots of bubbles popping on the surface of the soup.

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This experiment will show us what makes the soup bubble.

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I'm wearing my heatproof gloves

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because we're using the Bunsen burner to heat up this water.

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Soup has lots of water in it,

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along with yummy foods and flavours.

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So let's see what happens when water heats up.

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Water doesn't smell lovely, like soup.

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What can you see in the water?

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-Bubbles!

-Bubbles!

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Yeah. So where are they moving to?

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The bubbles are moving up.

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Yes. The bubbles started at the bottom and moved up to the top.

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So when we heat water enough,

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like water in our soup, some of it turns into a gas.

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Most gases are invisible, like the air around us

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but in liquid, the gas makes bubbles that we can see

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which rise to the surface and pop, releasing the gas.

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I think we need to find out more. To do that, we need to visit

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a very special castle. Hoo-hoo!

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Hm. Where do you think we're going today?

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Nina said it's somewhere with a special castle.

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A castle! I wonder if it will have a king and queen in it!

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Or maybe a beautiful princess!

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Ooh, I think we're here.

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Oh, look!

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Hm. That's odd. The special castle is supposed to be around here

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but I can't see it. Can you?

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ALL: No, Nina.

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Ooh, I wonder what this is over here.

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Ahh, that's interesting.

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Inflatable rubber rings.

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Let's see what happens if we blow them up.

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Ooh, Nina's rubber ring feels firmer already.

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Oh, hoo-hoo! So what's happening to the rubber rings?

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They're getting bigger, Nina.

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Yes, they're getting bigger because we're blowing air into them.

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Air is a gas

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and when you push it into a space,

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it spreads out and fills up as much of the space as it can.

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-MOTOR HUMS

-Oh.

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What's that noise? It's getting louder and louder.

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Fantastic! I thought we were in the right place!

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This is a very special bouncy castle.

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It's going to show us what happens if a gas gets trapped.

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Fantastic! I'm going to bounce and bounce, and bounce!

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Boing! Boing! Boing! Boing! Boing!

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-What can you see happening?

-It's rising up and getting bigger.

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That's right and it's getting bigger because air is being pumped into it.

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Remember, gases like to spread out

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and take up as much space as possible.

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Since the air is trapped, it'll keep spreading out

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until it can't any more.

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Then the castle is ready for bouncing on!

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THEY ALL CHEER

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Whoo!

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-Oh, that was great fun, wasn't it?

-ALL: Yeah!

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It's time to go back to the lab for one final experiment!

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When I get my breath back!

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Your question was, why does the lid on a soup pan rattle?

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So far we've discovered that when a pan lid rattles,

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it moves up and down a tiny bit.

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and we also know that when we heat water or soup,

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we make bubbles of gas that rise to the surface and pop.

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Our final experiment will show us what happens when gas get trapped

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in our pan under the lid. Let's get experimenting!

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ALL: Yeah!

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OK, so you have your balloon pumps. Grab a hold of them.

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Now we're going to pump up these balloons.

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Three, two, one, go!

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Those balloons are filling the box. There's hardly any room left.

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Keep going.

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And...stop pumping!

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-Yes!

-Put your balloon pumps down.

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Wow.

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So what happened?

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The lid came up.

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Yes, the gas that we pumped into the balloons made them get bigger.

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The balloons are taking up so much space, the lid has been pushed up.

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It's just like what happens in a pot of soup.

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The gassy bubbles on the surface of the soup pop,

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releasing gas into the space between the soup and the lid.

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And the gas builds up

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and spreads out in the pot

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and, eventually, there's so much gas that it pushes the lid up.

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Now watch this.

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POP

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NINA LAUGHS

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Now what happened when I burst the balloon?

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-It's going down.

-Yeah, what's going down?

-The lid!

-That's right.

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When I burst the balloon, a bit of gas escaped so the lid went down.

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Your question was, why does the lid on a soup pan rattle?

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I think we've answered it. We found that when you heat soup,

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some of the water in it turns into gassy bubbles

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which pop, releasing gas into the pan.

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The gas builds up under the lid and pushes it up a bit.

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And some of the gas escapes, and the lid falls back down,

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making the rattling noise. I hope that's answered your question.

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It's important to stay away from hot pans and cookers. They can hurt you.

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ALL: Thanks, Nina. Bye!

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Bye! Hee-hee.

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

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

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Lab coat on, Nina.

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Lab coat on, Ollie.

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Safety gloves on, Nina?

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Safety gloves on, Felix.

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Don't forget your goggles, Nina.

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Goggles are on, Luke. I think we're ready!

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# We do experiments in the lab

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# Shooby-dooby, in the lab

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# Bubbling experiments in the lab

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# In the lab!

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# Go, Nina, in the lab

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# Fizzing and popping Steam and smoke

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# We need protection Don't we, folks?

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# We always put our safety first

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# Shooby-dooby, dooby-dooby

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# We do experiments in the lab

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# In the lab!

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# Go, Nina! #

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Oh, I've had a brilliant day.

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Listening to the t-t-t-t of the soup pan lid rattling.

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It's been a marvellous day.

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Heating water made lots of bubbles.

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I've had a fabby day!

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The bouncy castle went boing! Boing! Boing! Brilliant!

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Ahh, it's been such a great day, man!

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Watching them all pumping up the balloons.

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Our day's been bursting with experiments.

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I hope you've enjoyed it. See you soon!

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ALL: Bye!

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E-mail [email protected]

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Scientist Nina and her young experimenters discover the amazing ways that things can change and react in the everyday world.

Nina investigates why the lid on a soup pan rattles with the help of Belle, her hearing neuron. Experimenters Jake, Josh and Poppy visit Nina in her lab where she is heating some soup on her Bunsen burner. Using their senses, they notice that the rattling noise is caused by the lid moving up and down. But how does this happen? They discover that heating soup makes bubbles of gas rise and pop on the surface.

Then they go to see a bouncy castle being inflated and find out that gases like to spread out and take up as much space as possible. Finally, back in the lab, they do an experiment with balloon pumps and prove that a pan lid rattles when enough gas builds up to push the lid up!


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