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 > 0:00:32# Luke, he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:36# Ollie sniffs out smells and scents 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 > 0:00:47- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:47 > 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 > 0:00:54# Oh, yeah! #
0:00:56 > 0:00:57Oh, hello.
0:00:57 > 0:01:01I'm looking for a pair of tongs I've dropped in the water.
0:01:01 > 0:01:04They've sunk right to the bottom.
0:01:04 > 0:01:08Oh, there they are. I'll have to get you a pair of armbands next time!
0:01:08 > 0:01:10BEEPING
0:01:10 > 0:01:14I hear a beep, I see a flash. I wonder what they're going to ask.
0:01:19 > 0:01:21BOTH: Hi, Nina.
0:01:21 > 0:01:22Hi, guys.
0:01:22 > 0:01:25We've got a question for you.
0:01:25 > 0:01:27How do boats float?
0:01:27 > 0:01:30Oh, that's a great question. How do boats float?
0:01:30 > 0:01:34Come down to my lab, and we'll do some experiments to investigate.
0:01:34 > 0:01:39- BOTH: See you soon, Nina. Bye! - Bye!
0:01:39 > 0:01:43I'll need help to answer this and I know just who to ask.
0:01:43 > 0:01:46OK, Neurons, time to get to work.
0:02:02 > 0:02:04ALL: Neurons at the ready, Nina.
0:02:04 > 0:02:08OK. Today's question is, "How do boats float?"
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 > 0:02:28I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:28 > 0:02:32- Will it be lovely Luke?- For looking and seeing, day or night,
0:02:32 > 0:02:36- I'll help you with your sense of sight.- Will it be awesome Ollie?
0:02:36 > 0:02:39If it's pongy or whiffy but you can't tell,
0:02:39 > 0:02:43- my messages help your sense of smell. - Or will it be baby Bud?
0:02:43 > 0:02:47Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat!
0:02:51 > 0:02:53- It's Luke!- Yes!
0:02:53 > 0:02:59# Go Luke, go Luke Go Luke, go Luke... #
0:02:59 > 0:03:04Cool, Nina. I'll be looking out to help you.
0:03:04 > 0:03:07Today's question is, "How do boats float?"
0:03:07 > 0:03:12Because floating boats are something we see, Luke will help us today.
0:03:12 > 0:03:16I'd better get the lab ready before the experimenters arrive!
0:03:18 > 0:03:22Sonny likes kick boxing. His friend Harvey loves break dancing.
0:03:22 > 0:03:26But they both want to find out how boats float.
0:03:26 > 0:03:28So today, for one day only,
0:03:28 > 0:03:31Sonny and Harvey become the experimenters!
0:03:33 > 0:03:34Hi, guys.
0:03:34 > 0:03:36BOTH: Hi, Nina.
0:03:36 > 0:03:38Welcome to my science lab. Come in.
0:03:38 > 0:03:41Oh, it's lovely to see you both.
0:03:41 > 0:03:45You asked a brilliant question, "How do boats float?"
0:03:45 > 0:03:46But why do you want to know?
0:03:46 > 0:03:49We know boats float, but we don't know why.
0:03:49 > 0:03:51We need to investigate.
0:03:51 > 0:03:54For our first experiment, we'll use our senses.
0:03:54 > 0:03:57ALL: Woop, woo! A senses experiment!
0:03:57 > 0:03:59We're ready, Nina.
0:03:59 > 0:04:02OK, guys. Let's pick a boat to set sail.
0:04:09 > 0:04:12So, what are the boats doing?
0:04:12 > 0:04:13BOTH: Floating.
0:04:13 > 0:04:17That's right, they're staying on top of the water.
0:04:17 > 0:04:19OK, let's try something else now.
0:04:19 > 0:04:21This stone.
0:04:23 > 0:04:24Oh!
0:04:24 > 0:04:28Oh, dear. That certainly didn't float.
0:04:28 > 0:04:30It doesn't float, it sinks.
0:04:30 > 0:04:36Floating means something stays on top of the water, like these boats,
0:04:36 > 0:04:40and sinking means it drops down to the bottom, like the stone.
0:04:40 > 0:04:44Let's do another experiment to see what other things float.
0:04:46 > 0:04:50Now, these blocks all look the same shape and size, don't they?
0:04:50 > 0:04:52- Yes.- Yeah.
0:04:52 > 0:04:56But they're all made of something different. Let's try holding one.
0:04:56 > 0:04:59- What does that block feel like? - Light.
0:04:59 > 0:05:04Hmm. It does feel light, like a feather or a balloon.
0:05:04 > 0:05:08That's because it's made of polystyrene, that's very light.
0:05:08 > 0:05:10Let's try the next one.
0:05:10 > 0:05:15Ooh! This is much heavier! It's quite hard to pick up.
0:05:15 > 0:05:18What do you think of that? Two hands! Good.
0:05:18 > 0:05:21I think it's really, really, really heavy.
0:05:21 > 0:05:26And the reason that it's heavy is because it's made of metal,
0:05:26 > 0:05:28and most metals are very heavy.
0:05:28 > 0:05:32Now, this is made of wood.
0:05:32 > 0:05:36It's a bit heavy and a bit light.
0:05:36 > 0:05:39So it's lighter than the heavy metal block,
0:05:39 > 0:05:42but it's heavier than the light polystyrene.
0:05:42 > 0:05:47Which of these blocks do you think will float and which will sink?
0:05:47 > 0:05:49Sonny, can you pop that into the water?
0:05:51 > 0:05:52It floats!
0:05:52 > 0:05:55Harvey, put the wooden block in. Let's see what happens.
0:05:58 > 0:06:01Hey, the wooden block floats too!
0:06:01 > 0:06:04Now I'll put in the metal block.
0:06:04 > 0:06:06I wonder what will happen?
0:06:08 > 0:06:13Oh! The blocks made of wood and polystyrene floated,
0:06:13 > 0:06:17but the block made of metal sank right to the bottom.
0:06:17 > 0:06:21It's because even though some things look the same shape and size,
0:06:21 > 0:06:26they can weigh different amounts if they're made from different things.
0:06:26 > 0:06:29But why do some things float and others sink?
0:06:29 > 0:06:32I think we need to take a trip to the seaside!
0:06:32 > 0:06:33Let's go, experimenters!
0:06:38 > 0:06:43Oh, goody! I love this bit. I wonder where Nina is taking us.
0:06:43 > 0:06:46Nina said that we were going to the seaside.
0:06:46 > 0:06:50Oh, I can't wait! I love the sounds of the sea.
0:06:50 > 0:06:55Now, remember our experiment where the metal block sank to the bottom,
0:06:55 > 0:06:57but the others didn't?
0:06:57 > 0:07:00- Why do you think that happened? - Because it was heavy.
0:07:00 > 0:07:03You would think it's because it was heavier,
0:07:03 > 0:07:06but actually that's not quite right,
0:07:06 > 0:07:10because although some things are heavy and some are light,
0:07:10 > 0:07:12this is not why they sink or float.
0:07:12 > 0:07:16And an example of this is right here.
0:07:16 > 0:07:21Wow! That's the biggest rowing boat I've ever seen!
0:07:21 > 0:07:25That's not a rowing boat, Bud - it's a ferry boat.
0:07:25 > 0:07:28That's right, Ollie. This is a ferry boat.
0:07:28 > 0:07:32It's made of metal and it has to be big so lots of people
0:07:32 > 0:07:37and cars and lorries can travel on it across the sea.
0:07:37 > 0:07:42So why is this big, heavy, metal ferry boat able to float on water
0:07:42 > 0:07:46when the metal block in the lab couldn't? All aboard!
0:07:53 > 0:07:54Oh, look!
0:08:00 > 0:08:02Oh! It's great fun up here on deck,
0:08:02 > 0:08:07but it's not helping us work out how this big, heavy boat floats.
0:08:07 > 0:08:12We need to go down below, so follow me, me hearties!
0:08:24 > 0:08:28Wow! Look at the size of this place!
0:08:28 > 0:08:30It's gigantic!
0:08:30 > 0:08:32It certainly is, Bud.
0:08:32 > 0:08:35This boat isn't made of metal all the way through.
0:08:35 > 0:08:38Inside it has lots of space like this
0:08:38 > 0:08:41where all the cars and lorries park during the journey.
0:08:41 > 0:08:45When something has a big space in the middle, we say it is hollow.
0:08:45 > 0:08:49Hollow? I like the sound of that word!
0:08:49 > 0:08:52And filling these big, hollow spaces in the middle
0:08:52 > 0:08:54is lots and lots of air.
0:08:54 > 0:08:57Now, flap your hand in front of your face like this.
0:08:57 > 0:09:00- Can you feel the breeze?- Yes.- Yes.
0:09:00 > 0:09:03That's the air all around us moving about.
0:09:03 > 0:09:07So, some boats are big and heavy and made of metal,
0:09:07 > 0:09:11but they're also hollow and have lots of space inside them
0:09:11 > 0:09:15where there is air. I wonder if this helps a boat to float.
0:09:15 > 0:09:18It's time for one final experiment.
0:09:20 > 0:09:24For this experiment, we're going to play a little game.
0:09:24 > 0:09:28I've got some different things, and we're going to guess which float.
0:09:28 > 0:09:32First up is my favourite bath toy, the rubber ducks.
0:09:32 > 0:09:37Oh, I love rubber duckies! Quack, quack, quack!
0:09:37 > 0:09:41OK, Harvey, can you hold the big duck in one hand
0:09:41 > 0:09:42and the little duck in the other?
0:09:42 > 0:09:46Now, which one feels heavier?
0:09:46 > 0:09:48The big rubber duck.
0:09:48 > 0:09:52OK, let's see. We'll pop them in these scales.
0:09:56 > 0:09:58Oh!
0:09:58 > 0:10:01The big rubber duck's side is lower.
0:10:01 > 0:10:02That means it's heavier.
0:10:02 > 0:10:06Well done, you're right. The big rubber duck is heavier.
0:10:06 > 0:10:10- Which one do you think will float, Harvey?- The little duck.
0:10:10 > 0:10:12Let's find out.
0:10:12 > 0:10:15Three, two, one, go.
0:10:16 > 0:10:18Ooh!
0:10:18 > 0:10:22The big rubber duck floated, and the little rubber duck
0:10:22 > 0:10:23sank to the bottom.
0:10:23 > 0:10:27Now, let's try the football and the marble.
0:10:27 > 0:10:31OK, Sonny. Can you hold the football in one hand
0:10:31 > 0:10:33and the marble in the other?
0:10:33 > 0:10:36Which one is the heaviest, Sonny?
0:10:36 > 0:10:38- The football.- The football.
0:10:38 > 0:10:41Let's pop them on the scales and see.
0:10:42 > 0:10:43You ready?
0:10:44 > 0:10:45Oh!
0:10:45 > 0:10:49The football's definitely heavier.
0:10:49 > 0:10:51Which one do you think will float?
0:10:51 > 0:10:53The marble! The marble!
0:10:53 > 0:10:56I think you're right, Bud. The football's so heavy,
0:10:56 > 0:10:58it's bound to sink.
0:10:58 > 0:11:00Three, two, one, go.
0:11:02 > 0:11:06Look at that! The big football's sitting on top of the water,
0:11:06 > 0:11:10and the little, tiny marble has dropped to the bottom.
0:11:10 > 0:11:12Both the heavier, bigger things floated,
0:11:12 > 0:11:16and the smaller, lighter things sank.
0:11:16 > 0:11:22And that's these big things floating there are hollow inside,
0:11:22 > 0:11:25and the smaller things that sank, they're solid.
0:11:25 > 0:11:27Let me show you.
0:11:29 > 0:11:31Do you see?
0:11:31 > 0:11:36There's a big space inside them, just like on the ferry boat.
0:11:36 > 0:11:40Although they feel heavy, they're full of air.
0:11:42 > 0:11:47So, your question was, "How do boats float?" I think we've answered it.
0:11:47 > 0:11:51We learned that floating isn't about being light or heavy.
0:11:51 > 0:11:55We saw a light, tiny marble sink in our tank,
0:11:55 > 0:11:58and we saw a big, heavy ferry boat floating in the sea.
0:11:58 > 0:12:02But the boat wasn't solid all the way through -
0:12:02 > 0:12:05it was hollow and full of air, which is light.
0:12:05 > 0:12:09And our experiment showed that things that are hollow
0:12:09 > 0:12:11or have spaces are more likely to float
0:12:11 > 0:12:14than solid things, even if they feel heavier.
0:12:14 > 0:12:19So boats float because they are hollow and have air inside them.
0:12:19 > 0:12:21I hope that's answered your question.
0:12:21 > 0:12:24- BOTH: Thanks, Nina. Bye! - Bye!
0:12:29 > 0:12:32If you want to know more about the science all around us,
0:12:32 > 0:12:37go to the Nina section on the CBeebies website. Have fun!
0:12:39 > 0:12:41Lab coat on, Nina?
0:12:41 > 0:12:43Lab coat on, Ollie.
0:12:43 > 0:12:44Safety gloves on, Nina?
0:12:44 > 0:12:46Safety gloves on, Felix.
0:12:46 > 0:12:49Don't forget your goggles, Nina.
0:12:49 > 0:12:52Goggles are on, Luke. I think we're ready!
0:12:54 > 0:12:56# We do experiments in the lab
0:12:56 > 0:13:00- # In the lab! - Shooby-dooby, in the lab
0:13:00 > 0:13:02# Bubbling experiments in the lab
0:13:02 > 0:13:03# In the lab!
0:13:03 > 0:13:06# Go, Nina, in the lab
0:13:06 > 0:13:09# Fizzing and popping Steam and smoke
0:13:09 > 0:13:11# We need protection Don't we, folks?
0:13:11 > 0:13:16# We always put our safety first
0:13:16 > 0:13:18# Shooby-dooby, dooby-dooby
0:13:18 > 0:13:20# We do experiments in the lab
0:13:20 > 0:13:21# In the lab!
0:13:21 > 0:13:22# Go, Nina! #
0:13:22 > 0:13:26Ah, it's been such a great day, man,
0:13:26 > 0:13:29watching what floats and what sinks.
0:13:29 > 0:13:31The boats bobbed on the water,
0:13:31 > 0:13:34but the rock sank all the way to the bottom.
0:13:34 > 0:13:36It's been a marvellous day,
0:13:36 > 0:13:39feeling how heavy or light things were.
0:13:39 > 0:13:41Oh, I've had a brilliant day,
0:13:41 > 0:13:44hearing all the noises inside the ferry.
0:13:44 > 0:13:46There was plenty of space inside too,
0:13:46 > 0:13:48all filled with air.
0:13:48 > 0:13:51I've had a fabby day!
0:13:51 > 0:13:54My favourite was the big rubber ducky.
0:13:54 > 0:13:58He loved going for a paddle in the water! Quack, quack, quack!
0:13:58 > 0:14:01Our day's been bursting with experiments.
0:14:01 > 0:14:04Hope you've enjoyed it. See you soon. Bye!
0:14:04 > 0:14:06ALL: Bye!