0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:11# Ask Nina for some help Cos she's got a science show
0:00:11 > 0:00:15# She makes sense of her senses While helping all her fans
0:00:15 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:23- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:23 > 0:00:26# Nina and the Neurons find out what you need to know
0:00:26 > 0:00:29# Nina and the Neurons find out what you need to know
0:00:29 > 0:00:33# Luke, he helps us with our eyes and Felix with our touch
0:00:33 > 0:00:36# Ollie sniffs out smells And Belle, she hears so much
0:00:36 > 0:00:38# Bud is Ollie's brother He helps us with our taste
0:00:38 > 0:00:41# They're Nina's little neurons And they're coming to your place!
0:00:41 > 0:00:43- # Touch your tongue - Tongue!
0:00:43 > 0:00:44- # Fingers - Fingers!
0:00:44 > 0:00:48- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:48 > 0:00:51# Nina and the Neurons find out what you need to know
0:00:51 > 0:00:53# Nina and the Neurons find out what you need to know
0:00:53 > 0:00:55# Oh yeah! #
0:00:57 > 0:00:58Oh, hello!
0:00:58 > 0:01:01I'm just trying to fix my alarm clock.
0:01:01 > 0:01:04It didn't go off this morning and I was late getting to the lab.
0:01:04 > 0:01:07- BELL RINGS - Oh, oh, er...
0:01:07 > 0:01:09it'll definitely wake me up now!
0:01:09 > 0:01:13- BEEPING - Oh, I hear a beep, I see a flash,
0:01:13 > 0:01:15I wonder what they're going to ask.
0:01:18 > 0:01:20ALL: Hi, Nina!
0:01:20 > 0:01:22Hi, guys.
0:01:22 > 0:01:23We've got a question for you.
0:01:23 > 0:01:26Why is some food so noisy?
0:01:26 > 0:01:28That's a good really question.
0:01:28 > 0:01:30Why is some food so noisy? Normally,
0:01:30 > 0:01:34we just think about the taste of food, not the sound it makes.
0:01:34 > 0:01:38Why not come to the lab and we'll do some experiments to investigate.
0:01:38 > 0:01:41- ALL: OK, see you soon, Nina, bye! - Bye!
0:01:42 > 0:01:46I'll need help to answer this one, and I know just who to ask.
0:01:46 > 0:01:49OK, neurons, time to get to work.
0:02:01 > 0:02:04ALL: Neurons at the ready, Nina.
0:02:04 > 0:02:08OK. Today's question is, why is some food so noisy?
0:02:08 > 0:02:12Which neuron will be most useful to help find the answer?
0:02:12 > 0:02:14ALL: Me! Me! Me! Oh, me!
0:02:14 > 0:02:17Will it be fabulous Felix?
0:02:17 > 0:02:21I can help so very much if you need the sense of touch.
0:02:21 > 0:02:23will it be beautiful Belle?
0:02:23 > 0:02:27I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:27 > 0:02:29Will it be lovely Luke?
0:02:29 > 0:02:31For looking and seeing, day or night,
0:02:31 > 0:02:34I'll help you with your sense of sight.
0:02:34 > 0:02:36Will it be awesome Ollie?
0:02:36 > 0:02:38If it's pongy or whiffy but you can't tell,
0:02:38 > 0:02:42- my messages help your sense of smell. - Or will it be baby Bud?
0:02:42 > 0:02:47Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat!
0:02:52 > 0:02:53It's Belle.
0:02:53 > 0:02:56Go, Belle, go Belle!
0:02:56 > 0:02:59Go, Belle! Go, Belle! Go, Belle!
0:02:59 > 0:03:01Go, Belle! Go, Belle!
0:03:01 > 0:03:04Brilliant! I'm all ears, Nina.
0:03:04 > 0:03:07Today's question is, why are some foods so noisy?
0:03:07 > 0:03:10And because noises are something we hear,
0:03:10 > 0:03:12Belle, our hearing neuron, will help us today.
0:03:12 > 0:03:16I need to get the lab ready before the experimenters arrive.
0:03:18 > 0:03:20Emma loves her baby brother.
0:03:20 > 0:03:22Bronwyn loves rainbows.
0:03:22 > 0:03:24And Gemma loves cheerleading.
0:03:24 > 0:03:26They all want to know about noisy food.
0:03:26 > 0:03:31So today, for one day only, Emma, Bronwyn and Gemma
0:03:31 > 0:03:33become the experimenters!
0:03:33 > 0:03:35ALL: Hi, Nina!
0:03:35 > 0:03:37Welcome to my lab. Come in.
0:03:39 > 0:03:42You asked, "Why is some food so noisy?"
0:03:42 > 0:03:44Why do you want to know?
0:03:44 > 0:03:48Because when you eat some foods, they're really noisy.
0:03:48 > 0:03:51And you can't eat them quietly, even if you try.
0:03:51 > 0:03:54You're right, some food IS really noisy.
0:03:54 > 0:03:58It's time for our first experiment and we're going to use our senses.
0:03:58 > 0:04:02Woo-hoo! A senses experiment! We're ready, Nina.
0:04:02 > 0:04:05In these bowls we have some yummy foods
0:04:05 > 0:04:07and we're going to eat a bit of each of them
0:04:07 > 0:04:10and listen to hear if they're noisy or not.
0:04:10 > 0:04:15Brilliant! The very first experiment and there's lots of food to taste!
0:04:15 > 0:04:17So let's all have a piece of cheese.
0:04:23 > 0:04:25Is it a noisy food?
0:04:25 > 0:04:27- ALL: No.- No.
0:04:27 > 0:04:30We can't hear the cheese when we eat it.
0:04:30 > 0:04:32Now, what about the carrot?
0:04:32 > 0:04:34OK.
0:04:36 > 0:04:40CRUNCH! Oh, I can hear that!
0:04:40 > 0:04:41It's noisy.
0:04:41 > 0:04:45It is a bit, Belle. So, what sound does the carrot make?
0:04:45 > 0:04:48- ALL: It's crunchy.- Yeah,
0:04:48 > 0:04:51you have to really bite hard with your teeth to eat it.
0:04:51 > 0:04:54Now, I wonder if the banana is the same.
0:04:54 > 0:04:56Mmm.
0:04:58 > 0:05:01That's very easy to eat, isn't it?
0:05:01 > 0:05:02It's a bit gooey.
0:05:02 > 0:05:05Yeah! And it doesn't make a sound.
0:05:05 > 0:05:09OK, now the crisps. Let's all try one.
0:05:12 > 0:05:15- CRUNCH! - They are the noisiest of all!
0:05:16 > 0:05:17Yeah.
0:05:17 > 0:05:21The noisy foods, like the crisps and the carrot,
0:05:21 > 0:05:26feel hard, and the quiet foods - the cheese and the banana - feel soft.
0:05:26 > 0:05:29But what causes noisy food to make a racket?
0:05:29 > 0:05:32- I think it's time for another experiment!- ALL: Yay!
0:05:34 > 0:05:36So, we're now going to take
0:05:36 > 0:05:40some of the noisy and quiet foods that we tasted
0:05:40 > 0:05:42and see what happens when we break them.
0:05:42 > 0:05:47OK, first up is one of our soft, quiet foods - the yummy banana.
0:05:50 > 0:05:52- Did the banana make a noise? - ALL: No.
0:05:52 > 0:05:56No. It just sort of fell apart, and didn't make a sound.
0:05:56 > 0:05:59OK. Well, let's see what happens
0:05:59 > 0:06:03when we try and break one of our hard, noisy foods -
0:06:03 > 0:06:04the crisp.
0:06:04 > 0:06:06CRACK!
0:06:06 > 0:06:07Oh!
0:06:07 > 0:06:08So what happened?
0:06:08 > 0:06:12- It snapped. - And it made a cracking sound.
0:06:12 > 0:06:15Ooh... I wonder if noisy foods
0:06:15 > 0:06:19make a noise because they're hard and they snap. Look at this...
0:06:19 > 0:06:22They're both about the same shape and size
0:06:22 > 0:06:26but you can feel that this one is made of something hard -
0:06:26 > 0:06:27this is made of plastic -
0:06:27 > 0:06:32and this one here is made of something soft. Modelling clay.
0:06:32 > 0:06:37Now, if I try to snap the soft modelling clay...
0:06:39 > 0:06:40Oh. It just bends.
0:06:40 > 0:06:43And...I can pull it apart.
0:06:43 > 0:06:46- And did you hear any noise? - ALL: No.
0:06:46 > 0:06:49No. OK, well, let's see what happens
0:06:49 > 0:06:53if I try to break the hard plastic one.
0:06:54 > 0:06:55- SNAP! - Oh!
0:06:55 > 0:06:57- SHE LAUGHS - What did you hear?
0:06:57 > 0:07:00- ALL: A snapping noise.- Yeah!
0:07:00 > 0:07:05When hard things break, they make a sudden snapping noise,
0:07:05 > 0:07:09and when we bite or chew food, we break it into pieces with our teeth,
0:07:09 > 0:07:12and that makes lots of little snaps,
0:07:12 > 0:07:15and this is the snapping noise you hear.
0:07:15 > 0:07:20So, noisy foods are noisy because they're hard and crunchy,
0:07:20 > 0:07:22but why are they like this?
0:07:22 > 0:07:26To find out, why don't we go somewhere and get a bit messy?
0:07:26 > 0:07:27ALL: Yeah!
0:07:32 > 0:07:36Hmm! Where do you think we're going today?
0:07:36 > 0:07:40Nina said we were going somewhere to get messy.
0:07:40 > 0:07:44I hope it's really messy! Getting messy is fun!
0:07:44 > 0:07:48Look! I think we're here.
0:08:01 > 0:08:05Oh! She's using her hands to make the clay into a shape.
0:08:16 > 0:08:19That was amazing, Hannah!
0:08:19 > 0:08:21Thanks, Nina. Would you like a go?
0:08:21 > 0:08:23Oh, yes, please!
0:08:33 > 0:08:36Ha-ha-ha! They're getting into a right mess.
0:08:36 > 0:08:39What IS Nina making?
0:08:39 > 0:08:41THEY LAUGH
0:08:52 > 0:08:57- Our pots don't look very pot-like, do they?- No.
0:08:57 > 0:09:01They're all soft and wet and squidgy.
0:09:01 > 0:09:04But these pots - they're not soft, are they?
0:09:04 > 0:09:07No, Nina, they're hard.
0:09:07 > 0:09:11That's because they've been dried out in a special oven called a kiln.
0:09:11 > 0:09:16The hot kiln makes the water inside the wet clay come out,
0:09:16 > 0:09:19and when you take water out of something,
0:09:19 > 0:09:21we say it's dehydrated.
0:09:21 > 0:09:22We what, Nina?
0:09:22 > 0:09:26Dehydrated, Bud, and when things become dehydrated,
0:09:26 > 0:09:29they often go hard, like this.
0:09:29 > 0:09:33We know that banana's usually soft and quiet to eat
0:09:33 > 0:09:36but just like clay, they have water inside them,
0:09:36 > 0:09:40so when they're dried out, they become hard and crunchy
0:09:40 > 0:09:42and very noisy, like this.
0:09:42 > 0:09:45CRUNCH!
0:09:45 > 0:09:47Are all noisy foods dehydrated, Nina?
0:09:47 > 0:09:49No, they're not.
0:09:49 > 0:09:53Dried banana and crisps are very different
0:09:53 > 0:09:57from foods like raw carrot and apples.
0:09:57 > 0:10:02These are not dehydrated. They're just naturally hard and crunchy.
0:10:02 > 0:10:06But we need to go back to the lab for one final experiment.
0:10:06 > 0:10:07ALL: Yeah!
0:10:10 > 0:10:13Now, you asked, "Why is some food so noisy?"
0:10:13 > 0:10:16We've discovered that noisy foods are noisy because
0:10:16 > 0:10:20they are hard. Some foods, like apples and carrots
0:10:20 > 0:10:23are naturally hard and noisy to eat.
0:10:23 > 0:10:25Other foods, like bananas,
0:10:25 > 0:10:28start out soft and only become hard and noisy
0:10:28 > 0:10:31when they've been dried out, or dehydrated.
0:10:31 > 0:10:35So, if some quiet foods can be made to be noisy,
0:10:35 > 0:10:38is there any way of making noisy foods quiet?
0:10:38 > 0:10:40- Let's get experimenting!- Yeah!
0:10:40 > 0:10:44In front of you, you each have some noisy food,
0:10:44 > 0:10:47but not much, because it's not good to waste food.
0:10:47 > 0:10:50Emma, you have some crisps.
0:10:50 > 0:10:52Bronwyn, you've got some popcorn.
0:10:52 > 0:10:56Gemma, you've got some broken-up cracker biscuit.
0:10:56 > 0:11:00You should all have a nibble to make sure they're still noisy,
0:11:00 > 0:11:02for science reasons only, of course.
0:11:02 > 0:11:04CRUNCH!
0:11:04 > 0:11:08Yep! I can definitely hear that, Nina.
0:11:08 > 0:11:11Now you're going to pour a little bit of warm water
0:11:11 > 0:11:14on top of your food sample.
0:11:16 > 0:11:19Ooh! That's going all soggy.
0:11:19 > 0:11:21And now for our final taste test.
0:11:21 > 0:11:25Let's see if you've made the noisy food quiet.
0:11:48 > 0:11:50Ugh! That's horrible!
0:11:50 > 0:11:55Well, they're not noisy any more, but they aren't very nice, are they?
0:11:55 > 0:11:57ALL: No!
0:11:57 > 0:11:58They're yucky and soggy.
0:11:58 > 0:12:02Yes! So we CAN make noisy foods quiet.
0:12:02 > 0:12:05When some noisy, hard foods get wet,
0:12:05 > 0:12:09they become soft, and that means they're not so noisy any more,
0:12:09 > 0:12:12but they might not be very nice to eat.
0:12:12 > 0:12:15# Nina and the Neurons! #
0:12:16 > 0:12:20So your question was, "Why is some food so noisy?"
0:12:20 > 0:12:23I think we've answered it. First, we used our senses
0:12:23 > 0:12:26to discover that noisy foods feel hard
0:12:26 > 0:12:28and quiet foods feel soft
0:12:28 > 0:12:32and hard foods always break with a snapping noise.
0:12:32 > 0:12:36While some foods like apples are naturally hard and noisy,
0:12:36 > 0:12:41others start soft and become hard and noisy when they're dried out.
0:12:41 > 0:12:44So I hope that's answered your question!
0:12:44 > 0:12:46Thanks, Nina! Bye!
0:12:50 > 0:12:54If you want to more about the sciences all around us,
0:12:54 > 0:12:57go to the Nina section on the CBeebies website. Have fun!
0:12:57 > 0:12:59Lab coat on, Nina?
0:12:59 > 0:13:01Lab coat on, Ollie.
0:13:01 > 0:13:03Safety gloves on, Nina?
0:13:03 > 0:13:05Safety gloves on, Felix.
0:13:05 > 0:13:09- Don't forget your goggles, Nina. - Goggles are on, Luke.
0:13:09 > 0:13:11I think we're ready!
0:13:12 > 0:13:14# We do experiments in the lab
0:13:14 > 0:13:18- # In the lab! - Shooby-dooby, in the lab
0:13:18 > 0:13:20# Bubbling experiments in the lab
0:13:20 > 0:13:21# In the lab!
0:13:21 > 0:13:24# Go, Nina, in the lab
0:13:24 > 0:13:27# Fizzing and popping Steam and smoke
0:13:27 > 0:13:30# We need protection Don't we, folks?
0:13:30 > 0:13:34# We always put our safety first
0:13:34 > 0:13:36# Shooby-dooby, dooby-dooby
0:13:36 > 0:13:38# We do experiments in the lab
0:13:38 > 0:13:39# In the lab!
0:13:39 > 0:13:41# Go, Nina! #
0:13:41 > 0:13:43Oh, I've had a brilliant day!
0:13:43 > 0:13:48So many sounds! Snap! Crunch! Munch!
0:13:48 > 0:13:53It's been a marvellous day. Lots of hard and soft foods to feel.
0:13:53 > 0:13:55I've had a fabbie day!
0:13:55 > 0:13:58Everything tasted yummy!
0:13:58 > 0:14:02Until the soggy food at the end - yeuch!
0:14:02 > 0:14:05Our day's been bursting with sensational experiments.
0:14:05 > 0:14:07I hope you've enjoyed it. Bye!
0:14:07 > 0:14:09ALL: Bye!