0:00:35 > 0:00:40And that is why I told you not to go swimming in the fusion generator.
0:00:40 > 0:00:42Hello and welcome to Blast Lab!
0:00:42 > 0:00:45CHEERING AND APPLAUSE
0:00:45 > 0:00:48Joining me will be two teams of young science buffs
0:00:48 > 0:00:50who'll challenge each other for top prizes.
0:00:50 > 0:00:52Coming up, it's Fact Nav 2.0 with Oliver!
0:00:52 > 0:00:54CHEERING
0:00:57 > 0:01:01In Mini Science, we'll have tea and biscuits and rocket-racing,
0:01:01 > 0:01:03my favourite combination.
0:01:06 > 0:01:09And at the Lab Rats' favourite festival, Blastonbury,
0:01:09 > 0:01:13they conduct an unusual experiment into the gaseous components of...
0:01:13 > 0:01:14PFFFRRRT!
0:01:20 > 0:01:24To top off the show, we have a tank, its contents are sceptic.
0:01:24 > 0:01:25It's the Sceptic Tank!
0:01:25 > 0:01:27CHEERING
0:01:28 > 0:01:31When organising security for this top-secret laboratory,
0:01:31 > 0:01:36I decided to pick someone who could disarm an assailant in two seconds.
0:01:36 > 0:01:39And bake a Victoria sponge in about half an hour.
0:01:39 > 0:01:40It is my Ninja Nan!
0:01:47 > 0:01:51Let's see what she's doing over in the Ninja Nannex right now.
0:01:51 > 0:01:55Oh! She's doing a crossword and Sudoku both at the same time.
0:01:55 > 0:01:57That is Ninja training for you.
0:01:57 > 0:02:00Let's look at who's trying to get into my lab today.
0:02:00 > 0:02:03CHEERING AND APPLAUSE
0:02:06 > 0:02:09Hello! Hello. Well, that's a warm welcome, but we don't know you.
0:02:09 > 0:02:13You might not be the real Red Team. We must check for security reasons.
0:02:13 > 0:02:18- Your names, please. What are they? - Bria!- Indie!- Chloe!
0:02:18 > 0:02:21OK, yeah, that checks out with the form.
0:02:21 > 0:02:24Under hidden talent, Bria, it says you'll perform a talent.
0:02:24 > 0:02:28- What can you do?- I can do the splits.- That's what it says here, OK.
0:02:28 > 0:02:31If you can, I'll believe you and let you into the lab.
0:02:31 > 0:02:32Ouch!
0:02:32 > 0:02:35Yeah! OK, that counts! On your feet.
0:02:35 > 0:02:36CHEERING
0:02:36 > 0:02:38Come into the lab, then.
0:02:40 > 0:02:42OK, you're past Ninja Nan and into the lab
0:02:42 > 0:02:45but just one final check for security purposes.
0:02:45 > 0:02:48A password was agreed with the real Red Team. What is it?
0:02:48 > 0:02:52- ALL: Dancing.- Yeah, that's what's written down here.
0:02:52 > 0:02:54You all do dancing together? OK.
0:02:54 > 0:02:56I believe you. You are officially the Red Team.
0:02:56 > 0:03:00You can go get settled in for the first game. Away you go.
0:03:00 > 0:03:02CHEERING AND APPLAUSE
0:03:02 > 0:03:05So, we have a Red Team. What we need now is a Yellow Team.
0:03:05 > 0:03:08Let's see who's claiming to be them.
0:03:08 > 0:03:10CHEERING
0:03:14 > 0:03:17OK, so you lot claim to be the Yellow Team, yeah?
0:03:17 > 0:03:19You'll have to prove it before we let you in.
0:03:19 > 0:03:21Your names, please.
0:03:21 > 0:03:24- Joseph!- Harry!- Henry!
0:03:24 > 0:03:27Joseph, Harry, Henry. Yup, that checks out.
0:03:27 > 0:03:29Talent. It's got all of your names here.
0:03:29 > 0:03:31What can you do to prove who you are?
0:03:31 > 0:03:35- Us boys can twist our hands right round.- Can you?
0:03:35 > 0:03:39Urgh! Urgh! Look!
0:03:39 > 0:03:42Stop it! Please, come in to the lab! Yes, I believe you!
0:03:42 > 0:03:43CHEERING
0:03:45 > 0:03:48That's really quite peculiar. I've not seen that before.
0:03:48 > 0:03:51All right, you're into the lab. Well done.
0:03:51 > 0:03:54A password was agreed with the official Yellow Team.
0:03:54 > 0:03:57To prove that's who you are, what is that password?
0:03:57 > 0:04:00- ALL: Cricket.- That's what I've got written down here.
0:04:00 > 0:04:03- Why did you choose that? - Cos we all play it together.
0:04:03 > 0:04:06Fair enough. Good luck in the lab. Go get settled for the first game.
0:04:06 > 0:04:08OK, away you go.
0:04:08 > 0:04:10That hand thing... Argh!
0:04:10 > 0:04:13It's time for the car that can handle broadband, Wi-Fi
0:04:13 > 0:04:16and Bluetooth with ease, but has a real problem with speed bumps.
0:04:16 > 0:04:17It is, of course, Oliver.
0:04:39 > 0:04:42Welcome, Oliver. In you come.
0:04:42 > 0:04:45Oliver has got the latest version of Fact Nav 2.0.
0:04:45 > 0:04:47It's a system that can provide you
0:04:47 > 0:04:49with literally millions of scientific facts
0:04:49 > 0:04:53if it's installed properly, ie, not installed by me
0:04:53 > 0:04:56cos I did and it doesn't always work, so it's your job to work out,
0:04:56 > 0:04:59which facts are true and which are false.
0:04:59 > 0:05:02If a fact is true, Oliver will do this.
0:05:02 > 0:05:05ALARM AND CAR HORN
0:05:05 > 0:05:07And if it's false, Oliver will do this.
0:05:07 > 0:05:09FOGHORN BLARES
0:05:09 > 0:05:12OK, we move into the first game.
0:05:12 > 0:05:16Now, you will see each team has three lights, lit red at the moment.
0:05:16 > 0:05:19When you answer a question correctly
0:05:19 > 0:05:22one of your lights will be turned to green. OK?
0:05:22 > 0:05:24The important thing, though,
0:05:24 > 0:05:29if you get a question wrong it'll turn one of the other lights green.
0:05:29 > 0:05:34There are three lights. Whichever team gets three green first wins.
0:05:34 > 0:05:35But remember, take care.
0:05:35 > 0:05:39A wrong answer doesn't mean you just don't get your own light green,
0:05:39 > 0:05:42you'll light one of theirs, too. You could win the game for them.
0:05:42 > 0:05:46To find out who's going to go first, and to light the first bulb,
0:05:46 > 0:05:48we start with a "nearest to" question.
0:05:48 > 0:05:53How many carats was the largest diamond ever found?
0:05:53 > 0:05:57How many carats was the largest diamond ever found?
0:05:57 > 0:05:59I want the answer in carats.
0:05:59 > 0:06:01Have a think and a chat amongst yourselves.
0:06:01 > 0:06:04You never know what one of you might know.
0:06:06 > 0:06:09- Five, four...- Ooh, hello. Time's going to be up when we get to one.
0:06:09 > 0:06:12..two, one, time's up.
0:06:12 > 0:06:16OK. Yellows, you've got to finish. Come on, let's see what you've got.
0:06:16 > 0:06:2019 carats. From the Reds, 16 carats.
0:06:20 > 0:06:23The point, remember, goes to the team that gets the closest
0:06:23 > 0:06:27to the actual answer. And that actual answer is...
0:06:27 > 0:06:323,106 carats, which means the Yellows get a green light!
0:06:32 > 0:06:34CHEERING
0:06:34 > 0:06:36Yeah, well done!
0:06:36 > 0:06:39The diamond was called the Cullinan and was found in South Africa.
0:06:39 > 0:06:42It was cut into pieces. Obviously that's difficult.
0:06:42 > 0:06:44They must use a really sharp knife.
0:06:44 > 0:06:47One of those pieces was set into the crown jewels.
0:06:47 > 0:06:50Here comes your true or false question, OK?
0:06:50 > 0:06:54There are more species of fish than species of mammal.
0:06:54 > 0:06:57Is that true or false?
0:06:57 > 0:07:01More species of fish than species of mammal. True or false?
0:07:01 > 0:07:06OK, Yellows, what do you think? Is that true or false?
0:07:06 > 0:07:08- It's true.- You think it's true.
0:07:08 > 0:07:10Oliver, is it true or false?
0:07:10 > 0:07:12ALARM AND CAR HORN
0:07:12 > 0:07:15It's true, well done! You're on two.
0:07:15 > 0:07:17So that puts the Yellow Team in the lead,
0:07:17 > 0:07:20but, Reds, don't worry. It's not over yet.
0:07:20 > 0:07:22Here comes your science fact.
0:07:23 > 0:07:28Sodium chloride is the chemical name for malt vinegar.
0:07:28 > 0:07:31True or false?
0:07:31 > 0:07:34You don't have to write it down. Just decide between yourselves.
0:07:37 > 0:07:39- False.- You think false.
0:07:39 > 0:07:42You think sodium chloride isn't the chemical name for malt vinegar.
0:07:42 > 0:07:44Oliver, is it true or false?
0:07:44 > 0:07:45FOGHORN BLARES
0:07:45 > 0:07:49It's false, well done! That's a green light for you.
0:07:49 > 0:07:50CHEERING
0:07:50 > 0:07:55Well done to the Reds. Yellows, time for your next science fact.
0:07:55 > 0:08:00Scientists think that the universe was created five billion years ago.
0:08:00 > 0:08:03Have a chat, have a think.
0:08:03 > 0:08:06Audience, vote with your feet. True or false?
0:08:08 > 0:08:09ALARM
0:08:09 > 0:08:13Pretty much divided the audience. You think false, that it wasn't...
0:08:13 > 0:08:15How long ago do you think it was invented?
0:08:15 > 0:08:17Well, six million or something like that?
0:08:17 > 0:08:19You think it's millions, not billions.
0:08:19 > 0:08:22Down here, you lot think it's true.
0:08:22 > 0:08:27Erm, well, I think it's true because about 198 million years ago
0:08:27 > 0:08:32there were dinosaurs and there was a time before dinosaurs.
0:08:32 > 0:08:35I think, yeah, it was created about five billion years ago.
0:08:35 > 0:08:39That's some planning gone into that. Thank you for your help.
0:08:39 > 0:08:42Back to your places, please. It's down to the teams now.
0:08:42 > 0:08:46Scientists think the universe was created five billion years ago.
0:08:46 > 0:08:48- Is that true or false?- ALL: True.
0:08:48 > 0:08:50Oliver, is it true or false?
0:08:50 > 0:08:52FOGHORN BLARES
0:08:52 > 0:08:55It's false! Bad luck. That means we light a green for the Reds
0:08:55 > 0:08:59and we're now even. This game can turn around that quickly.
0:08:59 > 0:09:03It's actually much older than that. Scientists think the universe
0:09:03 > 0:09:05is 13.7 billion years-old.
0:09:05 > 0:09:08You'd need a pretty big birthday cake for all those candles.
0:09:08 > 0:09:11Right, Reds, this is your chance...
0:09:11 > 0:09:14Well, this is where it gets really quite difficult.
0:09:14 > 0:09:17I don't want to add to the pressure on you now, girls,
0:09:17 > 0:09:20but get this one right, you win the game!
0:09:20 > 0:09:22Get this one wrong, they win the game!
0:09:22 > 0:09:25Here's your science fact.
0:09:25 > 0:09:30The tallest mountain in the world from top to bottom is in Hawaii.
0:09:31 > 0:09:36The tallest mountain in the world from top to bottom is in Hawaii.
0:09:36 > 0:09:38True or false?
0:09:41 > 0:09:45So, the tallest mountain in the world from top to bottom
0:09:45 > 0:09:46is in Hawaii, is that true or false?
0:09:46 > 0:09:48Absolutely false.
0:09:48 > 0:09:51Not only false, but absolutely false.
0:09:51 > 0:09:54Oliver, they think it's... You think it's...?
0:09:54 > 0:09:58- False.- Absolutely false. Oliver, is it true or false?
0:09:58 > 0:10:00- ALARM AND CAR HORN - It's true, I'm sorry,
0:10:00 > 0:10:03the point goes to the Yellows!
0:10:03 > 0:10:05I'm sorry.
0:10:05 > 0:10:08It's actually Mauna Kea.
0:10:08 > 0:10:10It's only 4,205 metres from high from sea level,
0:10:10 > 0:10:12but I said from top to bottom.
0:10:12 > 0:10:14And from the bottom of the seabed,
0:10:14 > 0:10:19it's an enormous 10,205 metres - 1,000 metres taller than Everest.
0:10:19 > 0:10:22So, you learned something new, but it cost you the round.
0:10:22 > 0:10:24We go on, because the score is...
0:10:24 > 0:10:271-0 to the Yellows!
0:10:27 > 0:10:30CHEERING AND APPLAUSE
0:10:44 > 0:10:49Now, I'd always dreamt of building a time machine of my very own,
0:10:49 > 0:10:53so when I finally managed it, I knew what I wanted to do -
0:10:53 > 0:10:57go back to prehistoric times and see if dinosaurs could play Twister.
0:10:57 > 0:11:01They couldn't. But next, I wanted to go back in time
0:11:01 > 0:11:03to bring back my school science teacher
0:11:03 > 0:11:04to help me out here in Blast Lab.
0:11:04 > 0:11:08And I did. It was brilliant, apart from in my rush,
0:11:08 > 0:11:11I pressed the wrong button and she came back as a ten-year-old.
0:11:11 > 0:11:14- It is of course, Minnie Miss! - CHEERING AND APPLAUSE
0:11:19 > 0:11:22Richard, comb your hair, it's a disgrace!
0:11:22 > 0:11:25Thought it was style, Miss. Sorry, Miss.
0:11:25 > 0:11:27Now, Miss, I do have a problem.
0:11:27 > 0:11:30I sort of forgot Ninja Nan's birthday this week,
0:11:30 > 0:11:32and she is rather cross with me.
0:11:32 > 0:11:35Actually, no, she's furious.
0:11:37 > 0:11:41So, to make it up to her, I thought I'd make her tea and biscuits.
0:11:41 > 0:11:44But I can't get close enough to give her the tea and biscuits
0:11:44 > 0:11:48- without getting hurt - can you help? - I've got a plan.
0:11:48 > 0:11:51But in the meantime...
0:11:51 > 0:11:55give her this potpourri. It works like catnip on her.
0:11:55 > 0:11:59Mmm, lovely woodland smells, this will calm her down no problem.
0:11:59 > 0:12:01Thank you. And you've given me a delivery device...
0:12:01 > 0:12:05Audience, stand back, please. No sudden moves. She is angry.
0:12:05 > 0:12:09This calms her down. It always works, watch. Angry, angry, angry...
0:12:09 > 0:12:12Look, happy!
0:12:12 > 0:12:15Agh! I'm going to put that there, Ninja Nan, there you go.
0:12:15 > 0:12:17There, there! Potpourri, lovely!
0:12:17 > 0:12:19Stir it up a little bit... And then run!
0:12:19 > 0:12:23OK, that's Ninja Nan sorted. Mini Miss, that was a brilliant idea.
0:12:23 > 0:12:26But it won't be long before she remembers what she was cross about,
0:12:26 > 0:12:28so what can we do?
0:12:28 > 0:12:32I'll show you how to calm her down in a game I like to call...
0:12:34 > 0:12:38- Bless you! - I've given both teams a balloon
0:12:38 > 0:12:41- and a clothes peg.- Yes...
0:12:41 > 0:12:44And I'm going to use these to make a balloon rocket.
0:12:44 > 0:12:45- Oh, right, OK.- Like this.
0:12:45 > 0:12:48That's a balloon with a clothes peg on the end, I can see that.
0:12:48 > 0:12:53Ah! Now, so this is like a runway made out of elastic,
0:12:53 > 0:12:56this is a milk straw with a hook-and-loop fastener -
0:12:56 > 0:12:57I've seen these before.
0:12:57 > 0:13:01So this is a rocket - but with the clothes peg on the front,
0:13:01 > 0:13:04- it can carry cargo.- That's right. - Are you going to launch it?- Yes.
0:13:04 > 0:13:07Let's do a countdown, please, audience - three, two, one...
0:13:07 > 0:13:08Go!
0:13:08 > 0:13:12I like it. So, with the clothes peg on the front of the balloon...
0:13:12 > 0:13:16It's distracted Ninja Nan, we may have alarmed her. Yes, she's cross,
0:13:16 > 0:13:18because there's nothing with it.
0:13:18 > 0:13:20But with that clothes peg arrangement,
0:13:20 > 0:13:22I could attach, I've got a tea bag
0:13:22 > 0:13:26- and a teaspoon and a biscuit. - Have you only just got that?- Yeah.
0:13:26 > 0:13:29I've just worked it out, but it is a brilliant plan.
0:13:29 > 0:13:32You've saved my life. Do you want to brief the teams?
0:13:32 > 0:13:35- You never were the brightest in the class, were you, Richard?- No, Miss.
0:13:35 > 0:13:38But I am determined and quite brave, because I'm about to
0:13:38 > 0:13:43go into the Ninja Nannex and retrieve that bit of balloon.
0:13:43 > 0:13:45Look, Nan! Potpourri!
0:13:45 > 0:13:47Look, nice smells wafting at you... There you go!
0:13:47 > 0:13:49Right, OK, run away!
0:13:49 > 0:13:51What we're using here
0:13:51 > 0:13:54is one of Blast Lab's all-time heroes, Sir Isaac Newton.
0:13:54 > 0:13:58# Hallelujah! Hallelujah! #
0:13:58 > 0:14:00Newton was brilliant at working out how things move.
0:14:00 > 0:14:03He came up with three laws of motion, and his third law said,
0:14:03 > 0:14:05if you push something one way,
0:14:05 > 0:14:08there is an equal push going in the opposite direction.
0:14:08 > 0:14:11So when the balloon is inflated, it's all stretched out,
0:14:11 > 0:14:14which means it wants to shrink back to its ordinary shape.
0:14:14 > 0:14:17As it does so, it squirts the air out that way.
0:14:17 > 0:14:20That means there's as much of a push going on that way,
0:14:20 > 0:14:23and it pushes the milk straw down the elastic
0:14:23 > 0:14:26and delivers the tea bag, biscuit and teaspoon to Ninja Nan.
0:14:26 > 0:14:29He probably had that in mind when he came up with that law.
0:14:29 > 0:14:32Maybe. Right, Let's see how things are going on.
0:14:32 > 0:14:34Mini Miss has explained what to do.
0:14:34 > 0:14:36Try, please,
0:14:36 > 0:14:38and get the tea-making essentials down to Ninja Nan.
0:14:38 > 0:14:41You've got as much time as you like to do this.
0:14:41 > 0:14:43You've got three balloons each.
0:14:43 > 0:14:46You've each got biscuits, teaspoon and teabag.
0:14:46 > 0:14:49If we're ready - get on with it, in your own time, go!
0:14:51 > 0:14:52Both teams set to work
0:14:52 > 0:14:55on constructing their Ninja delivery system.
0:14:55 > 0:14:58Reds and Yellows now have their first balloons inflated,
0:14:58 > 0:15:01but here comes the tricky bit -
0:15:01 > 0:15:04getting the pegs and the Ninja tea equipment attached to the balloon.
0:15:04 > 0:15:08It's fiddly. But the Yellows have the teaspoon fitted
0:15:08 > 0:15:11and are ready to fire!
0:15:11 > 0:15:14There you go!
0:15:14 > 0:15:18And look at that, the rocket's spiralling down the line.
0:15:18 > 0:15:21But oh, no spoon for Nan!
0:15:21 > 0:15:24And the Reds' first attempt has ended up on the floor.
0:15:24 > 0:15:28Both teams now regrouping and loading up their next effort.
0:15:28 > 0:15:30They don't want to disappoint Ninja Nan.
0:15:30 > 0:15:33Stop, stop.
0:15:33 > 0:15:35Looks like the Yellows are nearly ready,
0:15:35 > 0:15:38- and they are going for their tea-bag launch.- Hurry, hurry.
0:15:38 > 0:15:44Ninja Nan, still waiting excitedly - coiled, like a coiled cushion.
0:15:44 > 0:15:49There it goes, and yes, Ninja Nan is very happy with that - very happy!
0:15:49 > 0:15:53Both teams now about to launch...
0:15:53 > 0:15:56Yellows first off, but Reds are off and running, too.
0:15:56 > 0:15:59Two biscuits to land! She doesn't know which one to have first!
0:15:59 > 0:16:02What could be better?
0:16:02 > 0:16:05Reds need to catch up. Oh, but that's a disaster.
0:16:07 > 0:16:10Now there go the Yellows, with their third balloon -
0:16:10 > 0:16:12to win the game!
0:16:16 > 0:16:19Well done, Yellow team that's all three down there,
0:16:19 > 0:16:22and that means you take the point from this round. 2-0 to the Yellows.
0:16:22 > 0:16:23Well done!
0:16:25 > 0:16:28And the really good news is, Ninja Nan is happy and content,
0:16:28 > 0:16:31so I can spend a bit of quality Nan time
0:16:31 > 0:16:34relaxing in the Nannex with her, and watching telly.
0:16:35 > 0:16:39Hello, Nan, nice to see you. Telly's on.
0:16:40 > 0:16:41Oh, yeah, I will.
0:16:43 > 0:16:46Welcome to Blastonbury, a typical English festival.
0:16:46 > 0:16:48Beautiful weather...
0:16:48 > 0:16:50RUMBLES OF THUNDER
0:16:50 > 0:16:54..friendly security. But best of all, lots of people.
0:16:54 > 0:16:58Hang on a second, this isn't what was promised on the ticket.
0:16:58 > 0:17:02It looks like my Lab Rats will have to make their own fun,
0:17:02 > 0:17:05because this festival is rubbish.
0:17:05 > 0:17:09# Here we come, here we go We got to rock
0:17:09 > 0:17:10# Easy come, easy go... #
0:17:10 > 0:17:13Oh, no, it's the security guard. What now?
0:17:13 > 0:17:15No dancing?! Oh, come on!
0:17:15 > 0:17:19Well, at least my Lab Rats are still trying to have a good time.
0:17:19 > 0:17:23What? No groovy behaviour?! What are they supposed to do now?
0:17:23 > 0:17:29Ah, a trusty game of cards, a great way to pass the time.
0:17:29 > 0:17:31Oh, you can't be serious.
0:17:31 > 0:17:32No cards!
0:17:32 > 0:17:35That man certainly did seem serious.
0:17:35 > 0:17:39So it's official. Blastonbury is terrible.
0:17:39 > 0:17:43With so many restrictions my Lab Rats have decided to have some food,
0:17:43 > 0:17:49but beans? Careful, Lab Rats. Beans can make you, you know, gassy.
0:17:49 > 0:17:50PFFFRRT!
0:17:50 > 0:17:53Told you. That's... Oh, dear.
0:17:53 > 0:17:54PFFFRRT!
0:17:54 > 0:17:58OK, then. OK, this is getting out of control now. This is...
0:17:58 > 0:17:59PFFFRRT!
0:17:59 > 0:18:02..bad. OK. Here comes the warden. He's bound to stop them.
0:18:02 > 0:18:05- PFFFFFFRRRRRRRT! - What?! You could've stopped them!
0:18:05 > 0:18:06PFFFRRT!
0:18:06 > 0:18:10Don't you realise that farts can be dangerous?
0:18:10 > 0:18:14THEY ALL FART
0:18:14 > 0:18:17Some bottom gases have explosive properties.
0:18:17 > 0:18:21When exposed to heat these gases can react quickly with oxygen
0:18:21 > 0:18:25to make expanding gases that take up much, much more space.
0:18:25 > 0:18:28If the reaction happens in an enclosed structure,
0:18:28 > 0:18:32this rapid increase in gas volume may not be able to be contained,
0:18:32 > 0:18:34leading to a gassy explosion.
0:18:38 > 0:18:43Well, as expected, our three Lab Rats need to use the loo.
0:18:43 > 0:18:47Lucky for them, we've made them each a personalised lavatory.
0:18:47 > 0:18:52In each toilet is a balloon full of one of the elements of a fart.
0:18:52 > 0:18:56One with nitrogen, one with methane and one with hydrogen.
0:18:56 > 0:18:59Before they can use the loo, we need to clear out the gas,
0:18:59 > 0:19:03and what better way to do this than with a small spark.
0:19:03 > 0:19:07The bad news for them is that if the gas in their toilet is explosive
0:19:07 > 0:19:09it will ignite and rapidly expand,
0:19:09 > 0:19:13causing an explosion so big that it could destroy the toilet.
0:19:13 > 0:19:17But which of the three gases is most explosive?
0:19:17 > 0:19:21Hold the experiment there, because there's another point up for grabs.
0:19:21 > 0:19:27Which is the most explosive component of wind?
0:19:27 > 0:19:31Is it nitrogen, hydrogen or methane?
0:19:31 > 0:19:35Nitrogen, hydrogen or methane? Have a quick think.
0:19:38 > 0:19:41- So, Yellows, what do you think? - ALL: Methane.
0:19:41 > 0:19:43- Methane. Reds, what do you think? - Methane.
0:19:43 > 0:19:46Both the same answer. It can't move the balance in the scores,
0:19:46 > 0:19:48but the point is up for grabs.
0:19:48 > 0:19:52Both teams thinking methane. Let's find out the real answer.
0:19:52 > 0:19:54Let's get back to the experiment.
0:19:56 > 0:19:59Three toilets, each filled with a different fart gas,
0:19:59 > 0:20:02but which is the most explosive?
0:20:02 > 0:20:06Our three Lab Rats desperately need to use the lavatory,
0:20:06 > 0:20:09so first let's ignite the toilet full of nitrogen.
0:20:09 > 0:20:13Will the Lab Rat get to use the loo or is it the forest for him?
0:20:13 > 0:20:16Three, two, one...
0:20:16 > 0:20:18ignite!
0:20:18 > 0:20:22Hmm, so great news for our Lab Rat. Nitrogen isn't explosive.
0:20:22 > 0:20:24This means he can take care of business
0:20:24 > 0:20:26in the comfort of a proper lavatory.
0:20:26 > 0:20:28Now onto loo number two.
0:20:28 > 0:20:31It's full of a different fart gas - methane.
0:20:31 > 0:20:35I wonder if this one will go off with a bang.
0:20:35 > 0:20:37Three, two, one...
0:20:37 > 0:20:39ignite!
0:20:40 > 0:20:46We can see from the explosion that methane is indeed explosive.
0:20:46 > 0:20:50The reaction rips apart the toilet with ease,
0:20:50 > 0:20:53leaving our Lab Rat looking for a nice bit of forest
0:20:53 > 0:20:55to take care of business.
0:20:55 > 0:20:58Now, onto lavatory number three.
0:20:58 > 0:21:02This time, the loo is full of the last fart gas - hydrogen.
0:21:02 > 0:21:04Will we see another bang
0:21:04 > 0:21:08or will the Lab Rat get some much wanted privacy?
0:21:08 > 0:21:10Three, two, one...
0:21:10 > 0:21:12ignite!
0:21:12 > 0:21:16Wow! An even bigger explosion than the last.
0:21:16 > 0:21:18Hydrogen a clear winner.
0:21:19 > 0:21:23Our Lab Rat will have to find some quiet place in the forest
0:21:23 > 0:21:25for some "me" time.
0:21:29 > 0:21:30So it turns out...
0:21:30 > 0:21:32CHEERING AND APPLAUSE
0:21:32 > 0:21:35..the answer is hydrogen. No points to anyone but that's OK.
0:21:35 > 0:21:38The score stays the same. It's two to Yellows, none to Reds.
0:21:38 > 0:21:41We're going into the last game, you could still win the day.
0:21:41 > 0:21:45Teams, I'm going to send you off to go and get changed, if you would.
0:21:45 > 0:21:48Who'd like to see that again?
0:22:11 > 0:22:13CHEERING AND APPLAUSE
0:22:13 > 0:22:15It is time for...
0:22:18 > 0:22:22You might be interested to know that I've been conducting an experiment
0:22:22 > 0:22:25to see if alligators can survive in nuclear waste,
0:22:25 > 0:22:27in there.
0:22:27 > 0:22:31They can, which is amazing, but it does make them quite cross,
0:22:31 > 0:22:34so if one bites you...do scream.
0:22:34 > 0:22:37It'll be too late for you but it might give the others a chance, OK?
0:22:37 > 0:22:41Do that out of a sense of charity. No sudden moves, you'll be fine.
0:22:41 > 0:22:45You have some time to get as many prize discs of your team's colour
0:22:45 > 0:22:47into these baskets as possible.
0:22:47 > 0:22:50Prizes include a radio-controlled helicopter,
0:22:50 > 0:22:53an electronic project set and a personal weather station.
0:22:53 > 0:22:56But as well as the prize discs in there, teams,
0:22:56 > 0:22:57lurking, there are these.
0:22:57 > 0:23:00This is a horrid species, this red and yellow herring.
0:23:00 > 0:23:05If one of these gets into your net you will lose a precious prize disc.
0:23:05 > 0:23:08Yellow, you start first, you've got the most points
0:23:08 > 0:23:09so you get a five-second head start.
0:23:09 > 0:23:12Reds, when you hear the second klaxon, you start, OK?
0:23:12 > 0:23:16Good luck, both teams, with the prize discs...and the alligators.
0:23:16 > 0:23:20You have some time to get as many prize discs as possible,
0:23:20 > 0:23:22and that some time starts... Now!
0:23:22 > 0:23:24KLAXON BLARES
0:23:24 > 0:23:27And the Yellows burst into what can only be called action.
0:23:27 > 0:23:28SECOND KLAXON
0:23:28 > 0:23:32The second siren, and the Reds take on the characteristics
0:23:32 > 0:23:35of a gaggle of overfed turkeys on New Year's Day...
0:23:35 > 0:23:37I think.
0:23:37 > 0:23:40Thank goodness I remembered to warn them this time
0:23:40 > 0:23:42about the extra gunge coming down the pipes.
0:23:42 > 0:23:45I didn't remember to warn them.
0:23:45 > 0:23:49The Reds are chameleon-like in their toxic red goo,
0:23:49 > 0:23:53with only their faces visible above the slime.
0:23:53 > 0:23:58Looks like the Yellows are finally off the mark and now the Reds, too.
0:23:58 > 0:24:01Oh, no, it's a yellow disc. Best chuck that one back, Reds.
0:24:01 > 0:24:04But this is a red disc in the basket.
0:24:04 > 0:24:08The crowd can't believe the skill here. Something to tell the kids.
0:24:08 > 0:24:10No, not their kids, obviously. They are kids.
0:24:10 > 0:24:12The kids at schoo... Those kids.
0:24:12 > 0:24:15I'm confusing myself now. Let's get on.
0:24:15 > 0:24:18Both teams seem to be scoring for fun now,
0:24:18 > 0:24:21although Reds, that's a red herring. Better put that one back.
0:24:21 > 0:24:26AUDIENCE CHANTS
0:24:26 > 0:24:29- This game could not be closer today. - Five, four...
0:24:29 > 0:24:33The next disc is all-important and it's the Yellows who have it,
0:24:33 > 0:24:34I think.
0:24:34 > 0:24:38MAD CHEERING AND APPLAUSE
0:24:38 > 0:24:40That is it, time is up, I'm afraid.
0:24:40 > 0:24:42Only the team with the most prize discs wins.
0:24:42 > 0:24:46Let's have a Lab Rat to count them cos I don't want to burn my hands
0:24:46 > 0:24:48and I don't care about your paws.
0:24:48 > 0:24:50- Four for the Yellows.- Yes!
0:24:50 > 0:24:53And for the Reds, what have we got, Lab Rat?
0:24:53 > 0:24:56Two for the Reds. That means the Yellows are the winners!
0:24:56 > 0:24:57CHEERING
0:24:57 > 0:25:00Let's have a look at what you've won, Yellows.
0:25:00 > 0:25:01Ninja Nan, are you ready?
0:25:01 > 0:25:04An internal combustion engine. Well done, Yellows.
0:25:04 > 0:25:07Electronic project set.
0:25:07 > 0:25:08Sea monkeys.
0:25:09 > 0:25:13And an all-surface swingball for each of you.
0:25:13 > 0:25:17That's really good news! That makes us all feel good.
0:25:17 > 0:25:20What we're doing now is painful. You've won, that's lovely.
0:25:20 > 0:25:22These girls have not.
0:25:22 > 0:25:25This is what they each would have been taking home with them.
0:25:25 > 0:25:29A personal weather station. It would've been nice, I know.
0:25:29 > 0:25:33Electronic project set for each of you. Yeah, I know, I know.
0:25:33 > 0:25:35And in the real world, some you win and some you lose.
0:25:35 > 0:25:38In Blast Lab some you win, some you blow up in a bidet,
0:25:38 > 0:25:41because it's time for Bidet Goes Bang!
0:25:49 > 0:25:52So we've reached that point, Yellows, congratulations.
0:25:52 > 0:25:55Are you chuffed? It went well for you all through that.
0:25:55 > 0:25:58You'll take all these home. Congratulations to our winners.
0:25:58 > 0:26:01Reds, follow me over these chairs. Come on.
0:26:05 > 0:26:07Oh, let's go.
0:26:07 > 0:26:11Now, Reds, you know the drill.
0:26:11 > 0:26:14We've mounted the steps. You're all going to do it together?
0:26:14 > 0:26:17It's the best way, I think. Share the blame.
0:26:17 > 0:26:20Lift the plunger. OK, we'll give you a countdown for your...
0:26:20 > 0:26:24Well, this is your moment of glory. Enjoy, OK?
0:26:24 > 0:26:28Ready, audience? Count them down. Five, four, three, two...
0:26:28 > 0:26:30Duck!
0:26:30 > 0:26:32EXPLOSION
0:26:32 > 0:26:34CHEERING AND APPLAUSE
0:26:37 > 0:26:40Well done for playing, Reds, well done for playing.
0:26:40 > 0:26:43Sorry somebody had to lose. It was you guys this time.
0:26:43 > 0:26:44We've run out of time.
0:26:44 > 0:26:47I hope you've enjoyed learning about Newton's laws of motion
0:26:47 > 0:26:50and which bottom burp would best explode a Portaloo.
0:26:50 > 0:26:52Who said science can't be fun?
0:26:52 > 0:26:56Except the Science Can't Be Fun Society, who threw me out ages ago.
0:26:56 > 0:26:59There'll be plenty more fun next time so join me then. Bye-bye.
0:27:36 > 0:27:39Subtitles by Red Bee Media Ltd
0:27:39 > 0:27:42E-mail subtitling@bbc.co.uk