Hot Air Balloons Nina and the Neurons


Hot Air Balloons

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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. I'm just blowing up some balloons.

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You never know when you might need one for an experiment!

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I'm a bit out of breath after all of that.

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

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-Hi, Nina.

-Hi, guys.

-We've got a question for you.

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-How does a hot-air balloon fly?

-That's a great question.

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How does a hot-air balloon fly? It takes some very clever engineering.

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Come to my workshop and we'll investigate.

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See you soon, Nina. Bye.

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Bye. Well, I'm going to need some help to answer this one

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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 does a hot-air balloon fly?

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Which neuron would be most useful to help us find the answer?

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-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?

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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.

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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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COMPUTER BLEEPS

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It's Luke!

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NEURONS: Go Luke! Go Luke! Go Luke! Go Luke! Go Luke! Go Luke!

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Cool, Nina. I'll be looking out to help ya!

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Today's question is how does a hot-air balloon fly?

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As a hot-air balloon is something we can see,

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Luke'll be helping us.

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Stand by, Neurons, I've a feeling I may need help from you all.

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Right, I need to get the workshop ready before the engineers arrive.

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Sydney loves monkey bars. Thomas loves riding his bike.

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Amy likes walking in the woods.

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I saw a hot-air balloon flying in the sky.

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-A normal balloon doesn't fly.

-A hot-air balloon doesn't have wings.

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So today, for one day only, Sydney, Amy and Thomas become the engineers.

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-Hi, guys!

-ALL: Hi, Nina.

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Welcome to my workshop and thanks for your question -

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"How does a hot-air balloon fly?"

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To find out the answer, let's start by using our senses.

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NEURONS: Woop-woo! A senses experiment! We're ready, Nina.

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First, let's take a look at a hot-air balloon in action.

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LUKE: Whoa, look at that colourful, big balloon flying in the sky.

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Beautiful!

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-BUD:

-Oh, it's got a giant picnic basket underneath!

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It's not a picnic basket, Bud!

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That's the basket for the people.

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So, we know that a hot-air balloon can fly, but how does it do it?

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To find out, we need to know a bit more about air.

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Air is all around us, but we just can't see it. It's even in this bag.

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Woo-woo-woo!

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Just like it is in a normal balloon that you'd have at a party.

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-So what do you think will happen if I let it go?

-It'll fall.

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Well, let's see.

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Oh, you were right. When I let go of the bag, it fell.

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It's the same as the balloons we blow up at home. They don't lift up.

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But let's see what happens if we make the air inside a bag hot

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using my very own special air heater.

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Remember, hot things are dangerous

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so you should never try this at home.

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MACHINE WHIRRS

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There should be plenty of hot air in there now.

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Whoo, ah!

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So, what happened?

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It floated up.

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Yes, it floated up, and that is because hot air rises up the way.

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When we heated the air inside the bag,

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the hot air rose up and it lifted the bag up with it.

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But when we weren't, the air inside the bag cooled down.

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And as the hot air cooled, the bag came down.

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What goes up, must come down.

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So, from our experiment, we found out that hot air rises,

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whereas cold or normal air sinks.

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But that was just a light bag with a little bit of hot air in it.

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I wonder what would happen if we heated lots of air.

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Let's find out!

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Here we go! I can't wait to see where we'll end up today!

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-BELLE:

-Nina said it was somewhere with lots of air.

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Maybe it's somewhere really windy! Whoosh!

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We're about to find out, we're here!

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These are hot-air balloons and they are full of hot air.

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They're much bigger than our bag.

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Let's go and take a closer look at one!

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Brilliant, the fan has filled all of the balloon with air.

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-But it's quite cool air, isn't it?

-Yes, it is.

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So, now it is time to heat up the air,

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just like we did with our bag.

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So, let's go outside and see how they do it.

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Look, as the burners are heating the air, the air is rising

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and pushing the balloon up. Just like earlier with our bag.

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But you know, I don't think we can see very well from here.

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We need to get in the balloon. What do you think?

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-ALL: Yeah!

-Hee-hee-hee, let's go!

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LUKE: Hurry up, Nina.

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You don't want to miss the boat, or should I say basket?

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Oh, this balloon is really big.

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-Do you think it's big enough to lift us up?

-Yeah!

-Well, let's see.

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Can you loosen the ropes for us, please? Here goes!

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Yay, it's lifting us up.

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Engineers discovered that if we heat more air,

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it can lift bigger things, like us.

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What do you think will happen as the air starts to cool?

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We'll go down.

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Well, let's see.

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Oh, yes. Ha-ha-ha! Just like that.

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-Shall we do it one more time?

-Yeah!

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OK, hot air up!

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Cool air...

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-ALL: Down!

-Hee-hee!

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So, now we know how engineers make balloons fly using hot air!

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But we still don't know why hot air rises.

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I think we need to go back to the workshop to find out.

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So, your question was - "How does a hot-air balloon fly?"

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So far we've discovered that hot air rises and cool air sinks.

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Now, we want to know why hot air rises?

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It's time for one final experiment!

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So we want to know what happens to air when it gets hotter.

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I'm going to put this bottle into some warm water.

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And I've put some marbles in it, just to weigh the bottle down.

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And watch what happens to the balloon on top.

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FELIX: Remember, it's important not to touch hot water

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or it could burn you.

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-What's happened?

-The balloon's blowing up.

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Yes, as the air in the bottle heats up, it takes up more space

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and blows up the balloon.

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We haven't added any more air, the air gets warm and expands,

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which means it takes up more space.

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Hey, I can expand too, when I do this.

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Whoa, I'm taking up more space!

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That's right, Bud.

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Air is a bit like a ball of cotton wool.

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When it heats up, it expands and takes up more space.

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So, if we all pick up our cotton wool and gently pull it like this.

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It's the same amount, it just takes up more space.

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So now let's see what happens if I put the bottle into the cold water.

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Oh!

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The balloon's gone down.

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Yes. If we cool the air, it takes up less space,

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just like if we squash our cotton wool back into a ball.

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So we know that hot air takes up more space,

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but we still don't know why hot air rises. Come with me.

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We're going to pretend that all these balls are air.

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The blue balls are cold air, because they take up less space.

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And the red balls are hot air,

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because they've expanded and take up more space.

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I'll pop those back in here.

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So, we've got lots of hot and cold air mixed up together.

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Let's see what happens if we move our hot and cold air balls about.

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Amy, could you give it a good mix and a shake for me, please?

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That's it. Get your hands right in there. Good girl!

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LUKE: Those big red balls are pushing their way to the top.

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Wow, the hot air balls gradually lifted to the top

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and the cold air balls settled on the bottom.

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And this shows us what happens with hot and cold air. The hot air rises.

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That's because hot air is lighter than the colder air around it.

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# Nina and the Neurons! #

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Your question was, "How does a hot-air balloon fly?"

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And I think we've answered it.

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We discovered that hot air rises and cold or normal air sinks.

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A hot-air balloon is filled with lots of air which is then heated

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and the hot air lifts up the balloon.

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To come down again, you let the air cool.

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Hot air rises because it expands and is lighter than the air around it.

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And if you have enough hot air, you can lift a big balloon,

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and even people, up into the sky.

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Just like us in our very own hot-air balloon.

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-I hope that answered your question.

-Thanks, Nina. Bye.

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You're welcome. Bye.

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If you want to know more about the science and engineering

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that's all around us, go to the Nina section on the CBeebies website.

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Have fun!

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-Pulling!

-Pushing!

-Twisting!

-Mixing!

-Squeezing!

-Floating!

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# Go engineering!

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# Go engineering!

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# When we need to fly it, make it, shape it

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# Go engineering!

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# Go engineering!

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# When we want to build Go engineering

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# Engineering

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# When you've got to solve a problem But you don't know how to do it

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# It's time to go engineering

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# Engineering

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# When you want to lift it, stick it, pop it, bend it

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# It's time to go engineering

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# Engineering

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# Go engineering

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# Go engineering

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# When you need to fly it, make it, shape it

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# Engineering

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-# Go engineering

-Go engineering

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# When you want to build Go engineering

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# Engineering! #

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Aah, it's been such a great day, man,

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seeing all those bright,

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colourful balloons. There was lots of hot air.

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I've had a fabby day, especially going on a balloon ride!

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Up and away!

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I really enjoyed myself today.

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Shaking the balls around was fun - shaky, shaky!

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Remember, engineers help to build the world.

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They use science to solve problems.

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See you again soon. Bye!

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ALL: Bye!

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