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0:00:00 > 0:00:02- Subtitles- - Subtitles
0:00:20 > 0:00:22- Welcome to the series with me, - Sbarc!
0:00:24 > 0:00:26- And me, Nef Natur.
0:00:27 > 0:00:29- And me, Tudur Phillips.
0:00:29 > 0:00:32- A programme to amaze you.
0:00:32 > 0:00:34- Great and crazy devices.
0:00:36 > 0:00:38- All kinds of challenges.
0:00:40 > 0:00:46- On today's programme, the experiment - crew create shadows on the yard.
0:00:46 > 0:00:48- We visit a lighthouse.
0:00:49 > 0:00:53- The laboratory scientists - invent special glasses.
0:01:03 > 0:01:07- Time to sleep. - I only need a little light.
0:01:18 > 0:01:20- Woof-woof.
0:01:20 > 0:01:22- Woof-woof.
0:01:32 > 0:01:34- Playing with shadows is fun.
0:01:39 > 0:01:44- We need light from the sun - to see outside.
0:01:45 > 0:01:48- We can use torches.
0:01:48 > 0:01:54- At night, - we need lamps to help us see.
0:01:54 > 0:01:58- Stars give us light, - as do lamps and torches.
0:01:59 > 0:02:01- And electrical light.
0:02:01 > 0:02:05- The sun lights up the planet.
0:02:05 > 0:02:10- If you look down when it's sunny, - you can see your shadow.
0:02:10 > 0:02:15- The sun shines down - and you block part of the sunshine.
0:02:16 > 0:02:21- We stay in the same place - and we look at the ground...
0:02:21 > 0:02:24- ..and we can see our shadow - and we scream!
0:02:26 > 0:02:29- If you change shape, - the shadow changes shape.
0:02:30 > 0:02:35- Late in the afternoon, - your shadow lengthens.
0:02:36 > 0:02:39- You can't see at night - because it's dark.
0:02:39 > 0:02:43- The moon provides light at night.
0:02:43 > 0:02:46- We wouldn't have a morning - without the sun.
0:02:46 > 0:02:48- It's important to have a moon.
0:02:48 > 0:02:51- Without a moon, - we wouldn't have night-time.
0:02:51 > 0:02:56- Some creatures can see at night, - such as owls.
0:02:56 > 0:02:59- How can an owl see?
0:02:59 > 0:03:01- There's a bulb inside it.
0:03:07 > 0:03:09- It's time for our five facts.
0:03:09 > 0:03:11- Magic glasses, do your work.
0:03:17 > 0:03:22- Since the Earth revolves, the sun - only lights up one side at a time.
0:03:22 > 0:03:24- That's how we get day and night.
0:03:26 > 0:03:28- Even though sunlight looks white...
0:03:28 > 0:03:31- ..it's a mixture - of the colours of the rainbow.
0:03:33 > 0:03:37- Some creatures can see at night - despite it being dark.
0:03:41 > 0:03:43- In ancient times...
0:03:43 > 0:03:47- ..the sun's shadow helped people - to tell the time on a sun dial.
0:03:50 > 0:03:55- A lighthouse shines a bright light - to warn sailors of dangers at sea.
0:03:57 > 0:03:59- EXPERIMENT
0:03:59 > 0:04:05- OK, Ysgol Glan Morfa, we're on - the yard to measure your height.
0:04:06 > 0:04:10- We'll do that using the sun - and this - a piece of chalk.
0:04:11 > 0:04:15- On a bright day like today, the sun - throws its light on the ground.
0:04:15 > 0:04:19- If something stand in its way, - such as you and me...
0:04:19 > 0:04:21- ..shadows are created.
0:04:21 > 0:04:24- Have you seen shadows following you?
0:04:24 > 0:04:25- Yes.
0:04:25 > 0:04:27- Yes.- - Look!
0:04:27 > 0:04:31- Look at the shapes we can create - on the ground.
0:04:33 > 0:04:35- It's 9.00am.
0:04:35 > 0:04:38- The sun is relatively low - in the sky.
0:04:38 > 0:04:42- The sun will rise over our heads - and set over there.
0:04:42 > 0:04:44- Go and make some shadows.
0:04:48 > 0:04:50- Mia, stand very still.
0:04:51 > 0:04:56- Cerys, I want you to draw - the outline of Mia's shadow.
0:04:56 > 0:04:58- All of you, do the same.
0:05:01 > 0:05:03- It's 9.00am.
0:05:03 > 0:05:05- The sun is low in the sky.
0:05:05 > 0:05:09- Mia's body prevents - the sunlight reaching the ground.
0:05:10 > 0:05:12- A shadow has been created.
0:05:13 > 0:05:17- You can try this at home with - a friend and a piece of chalk.
0:05:18 > 0:05:20- Good job, Cerys.
0:05:22 > 0:05:24- Measure the length of Mia's shadow.
0:05:31 > 0:05:33- How long is Mia's shadow?
0:05:34 > 0:05:36- 288cms.
0:05:36 > 0:05:40- Wow! 288cms.
0:05:40 > 0:05:44- During the day, - the sun will rise above our heads.
0:05:45 > 0:05:49- We'll see how this affects - Mia's shadow at lunchtime.
0:05:49 > 0:05:51- Right, back to school.
0:05:53 > 0:05:57- Now then, it's lunchtime. - The sun's above our heads.
0:05:57 > 0:05:59- Do the same thing again.
0:06:00 > 0:06:02- Draw an outline of the shadows.
0:06:05 > 0:06:07- Will Mia's shadow be longer?
0:06:12 > 0:06:15- Now that the sun - is in a different position...
0:06:15 > 0:06:19- ..measure the shadows - to see if anything has changed.
0:06:26 > 0:06:28- How long is Mia's shadow this time?
0:06:29 > 0:06:30- 210cms.
0:06:31 > 0:06:33- 210cms.
0:06:33 > 0:06:37- At lunchtime, when the sun - is high over our heads...
0:06:37 > 0:06:39- ..the shadow is shorter.
0:06:39 > 0:06:43- During the morning, - and at the end of the afternoon...
0:06:43 > 0:06:47- ..the shadow is longer even though - we're the same height all day long.
0:06:48 > 0:06:49- DO YOU KNOW?
0:06:50 > 0:06:52- In a thunder and lightning storm...
0:06:52 > 0:06:55- ..which one comes first?
0:06:56 > 0:06:58- Lightning?
0:06:59 > 0:07:01- Thunder?
0:07:02 > 0:07:04- Or both come at the same time?
0:07:06 > 0:07:08- Find out later.
0:07:09 > 0:07:11- COME WITH US
0:07:12 > 0:07:13- Hello, I'm Twm.
0:07:13 > 0:07:14- Hello, I'm Twm.- - I'm Gwyn.
0:07:14 > 0:07:15- We're visiting...
0:07:15 > 0:07:16- We're visiting...- - A lighthouse.
0:07:17 > 0:07:21- This is Nash Point lighthouse. - It's been here for 180 years.
0:07:22 > 0:07:26- Its light warns ships - about sandbanks and other dangers.
0:07:27 > 0:07:30- The lighthouse walls are curved.
0:07:30 > 0:07:33- It makes the building strong.
0:07:40 > 0:07:45- Time for Gwyn and Twm to meet Chris, - the lighthouse manager.
0:07:45 > 0:07:48- He'll show them around.
0:07:51 > 0:07:53- First, they climb lots of steps.
0:07:53 > 0:07:56- Anyone counting?
0:08:02 > 0:08:04- Chris shows the boys the light...
0:08:05 > 0:08:08- ..that used to be - at the top of the lighthouse.
0:08:08 > 0:08:10- Can you see the bulbs?
0:08:10 > 0:08:17- The bulb light would be even - brighter when it hits this glass.
0:08:17 > 0:08:19- It's the same shape as a beehive.
0:08:19 > 0:08:22- It works - like a large magnifying glass.
0:08:22 > 0:08:24- The light is seen - from long distances.
0:08:25 > 0:08:29- What would happen on a foggy day - when the light isn't seen?
0:08:31 > 0:08:35- This foghorn would warn sailors - of nearby dangers.
0:08:39 > 0:08:41- They're off to explore some more.
0:08:44 > 0:08:48- More steps. - Are you still counting, boys?
0:08:50 > 0:08:52- There are 140...
0:08:52 > 0:08:54- There are 140...- - ..steps from top to bottom.
0:08:55 > 0:08:57- That's a lot of steps.
0:09:01 > 0:09:03- Up you go.
0:09:03 > 0:09:05- 138, 139...
0:09:05 > 0:09:07- ..140.
0:09:07 > 0:09:09- We've reached the top.
0:09:10 > 0:09:15- This is the light now used - at the top of the lighthouse.
0:09:16 > 0:09:19- It's smaller than the other one.
0:09:21 > 0:09:23- It turns and turns all the time.
0:09:23 > 0:09:27- It works in the same way - as the old one.
0:09:28 > 0:09:31- The glass creates light - that can be seen from a distance.
0:09:33 > 0:09:36- There's a great view from the top.
0:09:41 > 0:09:43- From the top of the lighthouse...
0:09:43 > 0:09:45- From the top of the lighthouse...- - The view is special.
0:09:46 > 0:09:47- Yes indeed.
0:09:47 > 0:09:53- This lighthouse - helps keep ships and boats safe.
0:10:00 > 0:10:02- DAILY FACT
0:10:03 > 0:10:06- Did you know that fireflies...
0:10:06 > 0:10:09- ..light up at night?
0:10:10 > 0:10:15- They have special chemicals - in their bodies which create light.
0:10:18 > 0:10:19- DO YOU KNOW?
0:10:20 > 0:10:22- In a thunder and lightning storm...
0:10:22 > 0:10:24- ..which one comes first?
0:10:26 > 0:10:27- Lightning?
0:10:29 > 0:10:30- Thunder?
0:10:32 > 0:10:34- Or both come at the same time?
0:10:35 > 0:10:36- The answer is...
0:10:37 > 0:10:38- ..lightning.
0:10:38 > 0:10:42- That's because - light travels faster than sound.
0:10:43 > 0:10:45- LOL LABORATORY
0:10:51 > 0:10:54- I'm Sbarc. - I'm in the Lol Laboratory.
0:10:54 > 0:10:55- Hello, scientists.
0:10:56 > 0:10:57- Hello, Sbarc.
0:10:57 > 0:10:59- Hello, Sbarc.- - We're in the Lol Laboratory.
0:10:59 > 0:11:02- The place where we invent - different things.
0:11:02 > 0:11:05- Are they good or are they rubbish?
0:11:05 > 0:11:08- With Sbarc in charge, - what do you think?
0:11:09 > 0:11:11- I wish I could see clearly at night.
0:11:11 > 0:11:16- Today we're inventing something - to help us see like an owl...
0:11:16 > 0:11:18- ..tu-whit-tu-whoo!
0:11:18 > 0:11:19- Any ideas?
0:11:20 > 0:11:22- Glasses that help you see - in the dark.
0:11:22 > 0:11:24- Great idea.
0:11:25 > 0:11:28- Glasses that help - you see in the dark. I like it!
0:11:28 > 0:11:30- We need glasses and torches.
0:11:32 > 0:11:36- Soon, my eyesight will be as good - as the night creatures.
0:11:37 > 0:11:40- The owl, the fox and hedgehog.
0:11:44 > 0:11:46- I can't wait to wear the glasses.
0:11:47 > 0:11:50- I don't think one torch is enough - though.
0:11:54 > 0:11:56- Can we use this?
0:11:56 > 0:11:59- It looks strange - but it does shine a light.
0:12:00 > 0:12:03- Perfect. - Let's fix it to the glasses.
0:12:03 > 0:12:06- I don't want anything falling off.
0:12:09 > 0:12:11- That looks ready.
0:12:11 > 0:12:15- There we go. Do you think that lamp - is good enough for the glasses?
0:12:16 > 0:12:18- Or do you want some more?
0:12:18 > 0:12:19- Yes.
0:12:19 > 0:12:20- Yes.- - Off you go.
0:12:20 > 0:12:23- This will be a sight to behold.
0:12:24 > 0:12:27- I love inventing incredible things.
0:12:28 > 0:12:31- Well done.
0:12:31 > 0:12:32- Let me see.
0:12:40 > 0:12:42- The important question is...
0:12:42 > 0:12:46- ..are my night-vision glasses - a good or bad invention?
0:12:46 > 0:12:48- Good.
0:12:48 > 0:12:52- Great. Another success - in the Lol Laboratory.
0:12:55 > 0:12:57- That's it for today. - See you next time.
0:12:58 > 0:12:58- .