Sniffing Smells Nina and the Neurons


Sniffing Smells

Scientist Nina and her young Experimenters discover how substances change and react. They investigate how smells reach people's noses through the air.


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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 feeling cold today, so I'm having a cup of hot chocolate.

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Oh, it smells delicious and chocolately.

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I hope it tastes as good as it smells! Ha-ha!

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Mm! Oh, it does.

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BEEPING

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

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ALL: Hi, Nina!

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Hello, there.

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We've got a question for you.

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How do smells reach our noses?

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That's a great question. How do smells reach our noses?

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Right now, I can smell my hot chocolate,

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but I'm not sure how the smell is reaching my nose.

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Come to my lab and we'll investigate.

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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, how do smells reach our noses?

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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.

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

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-Will it be lovely Luke?

-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 when you eat!

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CHEERING

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ALL: Go, Ollie! Go, Ollie!

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Go, Ollie! Go, Ollie!

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Standing by to smell and tell, Nina.

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Today's question is how do smells reach our noses?

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We'll be using our sense of smell to answer, so Ollie will help today.

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I need to get the lab ready before the experimenters arrive.

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Eliza grows vegetables, Eliana loves ice skating

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and Miranda likes cricket.

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but they all want to find out more about smells.

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So, today, Eliza, Eliana and Miranda become the experimenters.

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-Hi, Nina!

-Welcome to my science lab.

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Your question is - how do smells reach our noses?

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-Why do you want to know?

-In my bedroom, I can smell Mum's cooking.

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We want to know why.

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Sometimes if I do a smelly experiment in one part of the lab,

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I can often smell it in the next room.

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We need to do some investigating to find out more.

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We're going to use our senses.

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A senses experiment! We're ready, Nina.

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-What are your favourite smells?

-Chocolate.

-Crisps.

-Flowers.

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What smells do you not like?

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-Rotten fish.

-Smelly socks.

-Sewers.

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Sewers! Oh, they really are stinky smells!

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We're going to use our sense of smell to guess what's in these jars.

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Eliza, can you pop your blindfold on, please.

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I'll give you this jar.

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Just using your sense of smell, can you try and guess what's inside?

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Come on. Deep breaths in through the nose.

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That's it.

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Soap?

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Why don't you take off your blindfold and have a look? Soap!

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Well done!

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OK, Eliana. Can you pop your blindfold on for me?

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And...take a big sniff.

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-Is it an orange?

-Take your blindfold off and have a look!

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It is an orange! Excellent!

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And here's your jar in front of you.

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Is it mint?

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Have a look...

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It's a rose.

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That's a difficult one.

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Well done.

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So, we can smell things when we breathe in through our noses.

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But we still don't know how the smell reaches our noses.

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So I think we need to do another experiment!

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I have a special smelly treat for you in this box.

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-Shall we open it?

-ALL: Yeah!

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OK! Here we go.

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-NEURONS:

-Ugh!

-It stinks!

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Oh, Nina, that is one fantastic whiff-bomb of a cheesy smell!

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That is the cheesiest cheese ever!

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Are you going to taste it?

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Not today, Bud!

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This is a smelling experiment, not tasting, so I won't be eating any!

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-So what do you think of the smell?

-Weird!

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-Do you not like it?

-No!

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Blue cheese is one of my favourite smells!

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But I'll put the lid back on to stop the smell escaping.

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We have another surprise here, but this isn't for smelling,

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this is to look at.

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Cloud in a box! Cool, Nina!

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What's happening to the smoke?

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It's coming out and going out in the air.

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-It's twirling around and going out fast.

-Yes!

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So when the smoke escaped from the box,

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it spread out immediately,

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and in science, we call this diffusion.

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This is what happens to smells too.

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There are lots of cheesy particles in the cheese box.

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When they escaped, they diffused outwards towards our noses!

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And stunk us all out!

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You all did a great job of smelling the stinky particles.

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But for our next experiment,

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I'm taking you to meet a really special super smeller!

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So, let's go, experimenters!

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Off we go for another adventure.

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Nina said we're going to meet a super smeller.

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Maybe it's horses!

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Their big noses must be great for smelling!

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I think we're here! But I don't see any horses.

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This is the super smeller I told you about!

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This is Xena, the police dog!

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And I've got a challenge for her, and you too.

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But first, I'd like you to take a sniff of my scarf.

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So what does it smell like?

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It smells a bit perfume-y.

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What do you think, Xena?

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Xena...

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Oh! I think she liked that!

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So now I'm going to hide it,

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and we'll see who can find it using just their sense of smell.

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So no peeking!

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OK! You know how my scarf smells,

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so get your nose working and see if you can find it!

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Xena's even going to give you a head start.

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Three, two, one, go!

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They're smelling really hard, but they can't find it.

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It's no good, Nina.

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We've been sniffing all over.

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But we can't find the scarf!

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Well, let's give our super smeller, Xena, a try!

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XENA BARKS

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Woof! Woof! The dog sounds excited!

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Oh, wow! Xena's sniffed out my scarf really quickly. Well done, girl!

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And that's because dogs have a much better sense of smell than humans.

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Our noses have about five million smell sensors in them,

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which sounds like a lot.

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But dogs have about 220 million!

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Which means that dogs can smell some things that we can't.

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So I think we need to go back to the lab for one final experiment.

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Let's go!

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So, your question was how do smells reach our noses?

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And so far we have found out that to smell,

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we breathe air in through our noses.

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And when we do that, our noses are detecting tiny, smelly particles

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that have spread out, or diffused.

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But, why can't we always smell things?

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Let's get experimenting!

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KIDS: Yeah!

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OK, guys, noses at the ready, and step on to your feet.

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I'd like you to stand there for the whole experiment, OK?

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These petri dishes each have a single drop

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of something rather smelly in them,

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but you can't smell it at the moment

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because the lids are stopping the smell from escaping.

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I'm going to take the lids off, one at a time,

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and then you will give a big sniff,

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and tell me when you can smell the smell.

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Taking the first lid off.

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I'm sniffing and sniffing, but there's no smell.

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Can you smell anything?

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KIDS: No.

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Let's take off the second lid.

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Can you smell anything?

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No.

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No? OK, well, I'll take off the third lid!

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There's a faint waft of something.

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-Something minty.

-What do you guys think?

-Mint!

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Mint! Well done.

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It is minty!

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But we had to lift three of the lids before we could smell it.

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There were minty smelly particles going into the air,

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but our noses could not detect them until there were enough of them.

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Dogs can smell even a few smelly particles,

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but humans need there to be lots of particles,

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like with the stinky cheese, before we think something is smelly!

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Your question was how do smells reach our noses,

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and I think we've answered it!

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We discovered that when you smell something,

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your nose is detecting tiny invisible particles

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that floated into the air and spread out.

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And in science, we call this diffusion.

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But there needs to be lots of smelly particles

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for our noses to detect them,

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because our noses aren't as good as dog's noses.

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I hope that's answered your question!

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KIDS: Thanks, Nina. Bye!

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Bye, guys!

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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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And don't forget your goggles, Nina!

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Goggles are on, Luke!

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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! 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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# We do experiments in the lab... #

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-IN THE LAB!

-Go, Nina.

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I really enjoyed myself today.

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It was a sniff-a-thon of super smells.

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I had a fabby day!

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The stinky cheese in the box was really smelly!

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But I'd like to taste it.

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

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Nina's cloud in a box experiment was very cool.

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Oh, I've had a brilliant day,

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listening to all that doggy barking!

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Woof! Woof!

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Our day has been bursting with sensational experiments.

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

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ALL: Bye!

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Subtitles by Red Bee Media Ltd 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 how smells reach our noses, with the help of Ollie, her scent neuron. Experimenters Eliana, Eliza and Miranda visit Nina in her science lab and try to identify different things with just their sense of smell. Nina does an experiment with smelly cheese and some smoke to show how smells spread out, or diffuse, in the air.

Then they all go to meet a super-sniffing police dog. The children and Xena the dog are challenged to find Nina's hidden scarf using their noses. Back in the lab, they do a final experiment and discover that smells only reach our noses when there are enough smelly particles in the air for us to smell them.


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