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 > 0:00:14# She makes sense of her senses While helping all her fans
0:00:14 > 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 > 0:00:32# Luke, he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:35# Ollie sniffs out smells And Belle, she hears so much
0:00:35 > 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 > 0:00:50# Nina and the Neurons find out what you need to know
0:00:50 > 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 > 0:00:58Hello, there!
0:00:58 > 0:01:01I'm trying to get this piece of paper into the bin
0:01:01 > 0:01:04using a stretchy rubber band!
0:01:04 > 0:01:07Oh! There seems to be something wrong with it.
0:01:07 > 0:01:10- BLEEPING - Oh, I hear a beep, I see a flash,
0:01:10 > 0:01:12I wonder what they're going to ask?
0:01:14 > 0:01:16BOTH: Hi, Nina!
0:01:16 > 0:01:18Hello!
0:01:18 > 0:01:21- We've got a question for you. - Why does jelly wobble?
0:01:21 > 0:01:25Oh, what a great question! Why does jelly wobble?
0:01:25 > 0:01:30Why don't you come down to my lab and we'll do some experiments?
0:01:30 > 0:01:32BOTH: See you soon, Nina!
0:01:32 > 0:01:33Bye!
0:01:33 > 0:01:37I'll need help to answer this and I know just who to ask.
0:01:37 > 0:01:40OK, Neurons, time to get to work.
0:01:56 > 0:01:58ALL: Neurons at the ready, Nina.
0:01:58 > 0:02:03OK. Today's question is, why does jelly wobble?
0:02:03 > 0:02:07Which Neuron will be most useful to help find the answer?
0:02:07 > 0:02:09ALL: Me! Me! Me! Oh, me!
0:02:09 > 0:02:12Will it be fabulous Felix?
0:02:12 > 0:02:15I can help so very much if you need the sense of touch.
0:02:15 > 0:02:17Will it be beautiful Belle?
0:02:17 > 0:02:22I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:22 > 0:02:24Will it be lovely Luke?
0:02:24 > 0:02:26For looking and seeing, day or night,
0:02:26 > 0:02:29I'll help you with your sense of sight.
0:02:29 > 0:02:30Will it be awesome Ollie?
0:02:30 > 0:02:33If it's pongy or whiffy but you can't tell,
0:02:33 > 0:02:37- my messages help your sense of smell. - Or will it be baby Bud?
0:02:37 > 0:02:42Sour, salty, bitter or sweet, I'm your taste buddy when you eat!
0:02:44 > 0:02:47It's Bud and Ollie!
0:02:48 > 0:02:51ALL: Go, Ollie! Go, Bud!
0:02:51 > 0:02:55Go, Ollie! Go, Bud! Go, Ollie! Go, Bud!
0:02:55 > 0:02:57Yippee! It's you and me, sis!
0:02:57 > 0:03:00Stand by for a taste and smell-athon.
0:03:00 > 0:03:03Today's question is why does jelly wobble?
0:03:03 > 0:03:06Jelly is a food and Bud and Ollie
0:03:06 > 0:03:09are the neurons that help us smell and taste food.
0:03:09 > 0:03:13I'll get the lab ready before the experimenters arrive.
0:03:15 > 0:03:19Lydia likes going to Brownies. Her best friend, Mo, loves oranges.
0:03:19 > 0:03:23They both want to find out why jelly wobbles.
0:03:23 > 0:03:28Today, for one day only, Lydia and Mo become the experimenters!
0:03:31 > 0:03:34- BOTH: Hi, Nina! - Welcome to my lab! Come in.
0:03:34 > 0:03:39It's lovely to see you both. So your question is why does jelly wobble?
0:03:39 > 0:03:44- Why do you want to know?- I like jelly, but it wobbles off my spoon!
0:03:44 > 0:03:48It is strange. I can't think of many foods that wobble, can you?
0:03:48 > 0:03:50BOTH: No, Nina.
0:03:50 > 0:03:54I can't either and I know a lot about food!
0:03:54 > 0:03:58You certainly do, Bud. We need to do some investigating.
0:03:58 > 0:04:02For our first experiment, we're going to use our senses.
0:04:02 > 0:04:07ALL: Woop-woo! A senses experiment. We're ready, Nina!
0:04:07 > 0:04:12Here we have a lovely jelly. So, let's see it wobble.
0:04:12 > 0:04:14Ooh-ooh-ooh!
0:04:14 > 0:04:16THEY LAUGH
0:04:16 > 0:04:20Whoa! Wobbling is so much fun!
0:04:20 > 0:04:24Do you think you could tell if it was wobbling if you couldn't see it?
0:04:24 > 0:04:25Not sure.
0:04:25 > 0:04:29Well. Can you pop the blindfolds on for me, please?
0:04:30 > 0:04:32Excellent.
0:04:32 > 0:04:36Now, Lydia, there's something in front of you.
0:04:36 > 0:04:40I'd like you to touch it and tell me what it feels like.
0:04:40 > 0:04:42Hard.
0:04:42 > 0:04:44- Do you think it's jelly?- No.
0:04:44 > 0:04:50Now, Mo, there's something in the bowl in front of you.
0:04:50 > 0:04:52Can you tell me what it feels like?
0:04:52 > 0:04:56- Water.- Ah, so it's too runny to be jelly?
0:04:56 > 0:04:58OK. And...
0:04:58 > 0:05:01Lydia, there's something else here. Have a feel.
0:05:02 > 0:05:06- Jelly!- Jelly! Now, take your blindfolds off.
0:05:06 > 0:05:10Now, let's all try feeling the jelly.
0:05:11 > 0:05:13Ooh!
0:05:13 > 0:05:14Urgh!
0:05:14 > 0:05:17Ooh, it feels very strange.
0:05:17 > 0:05:20Squashy like rubber, but very sticky.
0:05:20 > 0:05:25So, this experiment has shown us that jelly isn't hard
0:05:25 > 0:05:27and it also isn't runny, like water.
0:05:27 > 0:05:31It's in between. I think we need to do another experiment.
0:05:33 > 0:05:39So, for this experiment, I'm going to pour some ordinary water in here.
0:05:44 > 0:05:49- And now I'm going to turn it upside down over one of your heads.- What?!
0:05:49 > 0:05:52- Who would like to volunteer?- Hm!- Hm!
0:05:52 > 0:05:55Oh, come on, someone's got to volunteer,
0:05:55 > 0:05:57or we can't do the experiment.
0:05:57 > 0:06:00- I'll do it.- Oh, well done, Mo!
0:06:00 > 0:06:02OK. Step over here into my paddling pool.
0:06:02 > 0:06:06What's Nina doing?! Mo is going to get all wet.
0:06:06 > 0:06:08Here we go!
0:06:09 > 0:06:11Oh!
0:06:11 > 0:06:15- Oh, that's odd!- You poured water in there, though.
0:06:15 > 0:06:16Give it a shake.
0:06:18 > 0:06:19Oh!
0:06:19 > 0:06:24Look at this weird stuff here.
0:06:24 > 0:06:27It feels rubbery and a bit like jelly.
0:06:27 > 0:06:31- And gooey.- Let me tell you a secret. Let's go back over here.
0:06:31 > 0:06:35There wasn't just water in the beaker.
0:06:35 > 0:06:39There was some of this stuff in the bottom too.
0:06:39 > 0:06:42This is a special substance called a polymer.
0:06:42 > 0:06:44A poly-what?!
0:06:44 > 0:06:48A polymer, Bud. There are lots of different polymers.
0:06:48 > 0:06:51But, when we add water to this polymer...
0:06:55 > 0:06:58..it makes the water go all rubbery.
0:06:58 > 0:07:02And jelly starts off as water too.
0:07:02 > 0:07:06Then you add a special food polymer and that makes it go all wobbly.
0:07:06 > 0:07:11- How does it make it wobbly, Nina? - That's a great question, Lydia!
0:07:11 > 0:07:16I know a really colourful place that might help answer it. Let's go!
0:07:20 > 0:07:25Here we go! I can't wait to see where we'll end up today!
0:07:25 > 0:07:30- Nina said it's somewhere really colourful.- That sounds lovely!
0:07:30 > 0:07:36- Maybe we'll find a rainbow? - A rainbow! With a pot of gold?
0:07:39 > 0:07:43Wow! It sure is colourful in here.
0:07:43 > 0:07:47I've brought you to this bead shop to do an experiment.
0:07:47 > 0:07:50First, you need to collect lots of beads.
0:08:04 > 0:08:09OK, let's imagine that these beads are a bit like water.
0:08:09 > 0:08:13Water is made of lots of tiny things called molecules,
0:08:13 > 0:08:17a bit like beads. And because water molecules are not joined together,
0:08:17 > 0:08:21they can move about freely and pour like this.
0:08:22 > 0:08:26Oh, what a brilliant noise the beads make!
0:08:26 > 0:08:29Now, let's see what happens if we tip the tray.
0:08:32 > 0:08:36They're rolling and flowing about, a bit like water.
0:08:36 > 0:08:39This string is a bit like a polymer.
0:08:39 > 0:08:43We're going to use it to show us how the jelly polymer works.
0:08:56 > 0:08:59Those beads are quite fiddly to string.
0:08:59 > 0:09:02What a great job they're doing!
0:09:02 > 0:09:06So, the beads are all joined together by the string.
0:09:06 > 0:09:10I'm going to put them back into this jug.
0:09:12 > 0:09:16So, let's see what happens when we pour them this time.
0:09:17 > 0:09:19They're all sticking together.
0:09:19 > 0:09:23Yes! The string is holding the beads together.
0:09:23 > 0:09:26This is what the jelly polymer does too.
0:09:28 > 0:09:33The molecules are the same, they're just joined together.
0:09:33 > 0:09:37Let's go back to the lab for one more experiment.
0:09:39 > 0:09:42We're going to make our very own jellies.
0:09:42 > 0:09:47This powder is a special polymer that's used to make jelly.
0:09:47 > 0:09:49This powder is safe to eat,
0:09:49 > 0:09:52but there are lots that can make you ill,
0:09:52 > 0:09:56so never eat things unless you know what they are and that they're safe.
0:09:56 > 0:10:02I have given each of us different amounts of the jelly polymer.
0:10:02 > 0:10:06We're going to mix it with exactly the same amount of water.
0:10:06 > 0:10:12The water's hot, so we're all wearing our protective gloves!
0:10:12 > 0:10:14Hot water can burn, you know.
0:10:14 > 0:10:19OK, Lydia. Would you say you've got more or less powder than I have?
0:10:19 > 0:10:23- More.- You're right! You've got twice as much.
0:10:23 > 0:10:26Mo, how much powder have you got?
0:10:26 > 0:10:28Lots more than both of you.
0:10:28 > 0:10:32You've actually got ten times more than I have,
0:10:32 > 0:10:36- so that jelly will definitely not be for eating.- Wowee!
0:10:36 > 0:10:39Will that make the jelly w-w-w-w-obbly?
0:10:39 > 0:10:41OK, pour your powder in.
0:10:48 > 0:10:50Give it a good stir.
0:10:50 > 0:10:54Excellent stirring, girls, excellent stirring.
0:10:54 > 0:11:00I'll pour these hot jelly mixtures into the moulds for all of us,
0:11:00 > 0:11:02as it's not safe to do so on your own.
0:11:02 > 0:11:05We'll chill these in the fridge for a while.
0:11:08 > 0:11:12We're almost ready to turn the jellies out.
0:11:12 > 0:11:16I had the smallest amount of powder, so let's see how it's turned out.
0:11:18 > 0:11:22Oh! Oh-hohohoh! I don't think that worked very well, did it?
0:11:22 > 0:11:23- No.- No.
0:11:23 > 0:11:27Oh, well. Lydia, let's see what your jelly looks like.
0:11:28 > 0:11:32Oh, now, that's what a jelly should look like!
0:11:32 > 0:11:34Give it a wobble!
0:11:34 > 0:11:37Wow! Look at that jelly wobble!
0:11:37 > 0:11:40Mo, let's see what yours looks like.
0:11:41 > 0:11:42Ooh!
0:11:42 > 0:11:44It looks pretty good.
0:11:44 > 0:11:47Why don't you give it a wobble?
0:11:53 > 0:11:55It's too solid to wobble!
0:11:55 > 0:11:59That experiment has shown us that jelly will only wobble
0:11:59 > 0:12:03if it has the right mixture of water and jelly polymer.
0:12:04 > 0:12:08So, your question was why does jelly wobble?
0:12:08 > 0:12:10And I think we have answered it!
0:12:10 > 0:12:15We found out jelly wobbles because of something called a polymer.
0:12:15 > 0:12:19This polymer can make water change from runny to solid
0:12:19 > 0:12:23by joining all the water molecules together like a string of beads.
0:12:23 > 0:12:25But a jelly will only wobble
0:12:25 > 0:12:29if it has the right mixture of water and polymer.
0:12:29 > 0:12:33If it's too solid, it won't wobble, and it's too runny,
0:12:33 > 0:12:37it'll just be a sloppy mess. I hope that answers your question.
0:12:37 > 0:12:39BOTH: Thanks, Nina! Bye!
0:12:39 > 0:12:40Bye!
0:12:45 > 0:12:48If you want to know more about the science around us,
0:12:48 > 0:12:52go to the Nina section on the CBeebies website. Have fun!
0:12:56 > 0:12:57Lab coat on, Nina?
0:12:57 > 0:12:59Lab coat on, Ollie.
0:12:59 > 0:13:01Safety gloves on, Nina?
0:13:01 > 0:13:03Safety gloves on, Felix.
0:13:03 > 0:13:05Don't forget your goggles, Nina.
0:13:05 > 0:13:09Goggles are on, Luke. I think we're ready!
0:13:10 > 0:13:12# We do experiments in the lab
0:13:12 > 0:13:16- # In the lab! - # Shooby-dooby, in the lab
0:13:16 > 0:13:18# Bubbling experiments in the lab
0:13:18 > 0:13:19# In the lab!
0:13:19 > 0:13:22# Go, Nina, in the lab
0:13:22 > 0:13:25# Fizzing and popping Steam and smoke
0:13:25 > 0:13:28# We need protection Don't we, folks?
0:13:28 > 0:13:32# We always put our safety first
0:13:32 > 0:13:34# Shooby-dooby, dooby-dooby
0:13:34 > 0:13:36# We do experiments in the lab
0:13:36 > 0:13:37# In the lab!
0:13:37 > 0:13:38# Go, Nina! #
0:13:38 > 0:13:40It's been a marvellous day.
0:13:40 > 0:13:44It was such fun, feeling the smooth, hard potato
0:13:44 > 0:13:47and the soft, sticky jelly.
0:13:47 > 0:13:49I've had a brilliant day.
0:13:49 > 0:13:52When Nina played that trick with the polymer,
0:13:52 > 0:13:55it made a wicked splatting noise.
0:13:55 > 0:13:57I've had a fabby day!
0:13:57 > 0:14:01The bestest bit was seeing the jellies wobble. Ha-ha!
0:14:01 > 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!
0:14:09 > 0:14:11Subtitles by Red Bee Media Ltd
0:14:11 > 0:14:13E-mail subtitling@bbc.co.uk