A quick learning for kids, along with lots of fun and joy. If you like the work please like and follow the channel. Your appreciations are much needed
Category
📚
LearningTranscript
00:00Oh, that looks like a black hole.
00:10Oh no, I shouldn't be here.
00:13But I am not going to go before I tell you about black holes.
00:18Come with me. Zoom in.
00:21A black hole is formed when the core of a star collapses and the star explodes.
00:28Therefore we can say that a black hole is born when a star dies.
00:36When a massive star reaches the end of its life, its core starts running out of fuel.
00:43The core is no longer able to hold a star back, resulting in its collapse.
00:51This gives birth to a mini black hole.
00:53With gravity running wild inside it, the black hole starts eating up everything that's left of the star.
01:03And it all happens in milliseconds.
01:06Even before the star can realize what's happening to it, it explodes.
01:12The explosion releases a tremendous amount of energy.
01:17Even more than our sun can produce in its entire lifetime.
01:21Whoa! Isn't that crazy?
01:25Hmm, let me tell you a secret.
01:29You could turn into a black hole.
01:32Yup! The computer you're using, me or anything around you that has matter..
01:39..has a Schwarzschild radius, also called the gravitational radius.
01:45Which is the radius of the tiny sphere.
01:48Into which if a mass of an object is compressed to fit in..
01:52..its escape speed would be equal to the speed of light.
01:56Which is way too much.
01:59But chances of you turning into a black hole are rare.
02:03Because of the tiny size of your Schwarzschild radius.
02:07Stuff that gets too close to a black hole gets sucked in..
02:11..because of the super humongous gravitational pull.
02:16So, nothing can escape a black hole.
02:20Not even light.
02:22Hey, have you ever wondered what would happen if two black holes collided?
02:27Chances are that they might become one big massive black hole.
02:33Or probably put up a fight and send one of them hurtling away.
02:38The bigger, the mightier.
02:41Trivia Time!
02:43Time runs differently near and inside a black hole.
02:47And this has a lot to do with gravity.
02:52The nearest black hole to earth is 1600 light years away.
02:58Don't worry friends, that's too long a time.
03:01This is me zooming out.
03:04I am the meteorite.
03:06Meteorite, don't take me for a ride, cause I then turn into a meteor.
03:11Ha! I pass through the atmosphere of the earth.
03:15Now don't get scared, cause I then turn into a meteorite.
03:19That's right! Ha ha!
03:21Very well Mr. Meteorite.
03:23Let me simplify your poem for my friends out here.
03:27Come, we'll talk about meteoroids, meteors and meteorites today.
03:34Zoom in!
03:36A meteoroid is a small rocky solar object found in the asteroid belt..
03:42..between Mars and Jupiter.
03:45Whoa! Yikes!
03:49Which is often known as the solar junkyard.
03:53When the molecules around the meteoroids rub against them, they start burning.
04:00When this burning meteoroid passes through the earth's atmosphere..
04:04..it is called a meteor.
04:06And when that meteor survives through the atmosphere..
04:11..and collides with the earth's surface, it's called a meteorite.
04:18A meteoroid.
04:20A meteor.
04:22And a meteorite.
04:24Haven't you seen shooting stars?
04:28Wow!
04:30Well, those are actually meteors.
04:35Some meteors burn brighter than the rest, often known as fireballs.
04:41Some fireballs appear even brighter than the planet Venus.
04:46Ha ha ha!
04:48There's a small percentage of meteoroids that follow a particular path..
04:54..to the earth's atmosphere and then back out again.
04:58And they are called grazing fireballs.
05:01About 25 million meteors enter the earth's atmosphere every day.
05:07But most of them often burn up, giving out 1 million kilograms of dust per day..
05:14..that settles on the earth's surface.
05:17So, who knows, the dust around you could be from space.
05:23Ha ha ha!
05:25The dust around you could be from space.
05:28Ha ha ha!
05:30The meteorites are classified into three types.
05:35The stony ones.
05:37The ones that have iron in them.
05:39And the magnetic ones.
05:43Trivia Time!
05:45Asteroids are parent bodies of meteoroids.
05:50Nearly 500 meteorites reach earth's surface every year.
05:56Out of which, only 5 to 6 reach the scientists for their study.
06:02I am the meteorite. I used to shine so bright.
06:06This earth is such a plight. I am the meteorite.
06:09I am the meteorite. I used to shine so bright.
06:12This is me zooming out.
06:20Hey there!
06:23Oh, don't worry. This is not real.
06:26I was just watching a movie.
06:30Hey friends, the dinosaurs are extinct but the myths surrounding them aren't.
06:36So why don't we bust some dino myths today?
06:40Zoom in!
06:42The word dinosaur is misinterpreted as terrible lizards.
06:48Well, dinosaurs were neither terrible nor lizards.
06:52The actual meaning of the word dinosaur is fearfully great.
06:58Well, many think that dinosaurs were huge.
07:02But you'd be surprised to know that Microraptor is the smallest species discovered yet.
07:09It's a crow-sized dinosaur from China.
07:14Many believe that humans and dinosaurs co-existed.
07:20Aha! Dinosaurs became extinct about 65 million years ago.
07:27Whereas, the first traces of human beings were just 6 million years old.
07:35I know it's kind of funny but a myth says that the dinosaurs died..
07:40..because mammals ate their eggs.
07:46That's not true.
07:49Because the mammals that lived at that time were far too small to eat their eggs.
07:56Probably just 2 grams.
08:00See that? Well, that's a pterosaur.
08:04Flying reptiles are often confused to be dinosaurs.
08:08But that's not true.
08:11Marine reptiles such as plesiosaurs and ichthyosaurs weren't dinosaurs.
08:17Dinosaurs were terrestrial beings.
08:20Now comes the biggest myth.
08:24An asteroid impact alone resulted in the extinction of dinosaurs.
08:29Well, the impact could have killed a lot of dinosaurs.
08:33But many argue that the dinosaurs at that time were on the verge of extinction.
08:39And the after effects of the asteroid impact such as..
08:44..giant tsunami, acidic rain and a cloud of dust..
08:49..played a major role in their extinction.
08:52TRIVIA TIME!
08:55The first dinosaur bone discovered was thought to come from an elephant.
09:00Not all dinosaurs had scales on their bodies.
09:03Some had feathers too.
09:07Hope the myths surrounding dinosaurs have become extinct in your minds now.
09:13Wait for more myths to be busted.
09:16This is me zooming out.
09:19Twinkle, twinkle little star.
09:23How I wonder what you are.
09:28Looks like the baby star has slept.
09:31But hey, you don't go to sleep.
09:34Because I'm here to tell you about different types of stars in space.
09:39Exciting, isn't it?
09:43So tell me, how many stars do you think are there in the universe?
09:48Oh come on, you can do it. Guess.
09:51Well the answer will be given at the end of this episode.
09:58Zoom in.
10:01So there are different kinds of stars.
10:04The big ones, even bigger than the sun.
10:08Small ones, some very odd ones and some new ones.
10:13But did you know that they are classified in groups?
10:17Yes, there are some specific types of stars.
10:22The Red Dwarf Stars.
10:24They are relatively smaller in size compared to the other stars.
10:29And therefore they burn at a lower temperature.
10:32Which helps them have a long sustainable life.
10:36Some say a trillion years.
10:39Nearly 70% of the stars in the universe are Red Dwarf Stars.
10:44But hey, since they don't shine so bright..
10:48..it gets difficult for humans to see them with naked eyes.
10:54The Yellow Stars.
10:56These are medium sized stars and therefore burn at a medium temperature.
11:01There are Yellow Dwarf Stars as well, that are not giant stars.
11:05Our sun is one of them.
11:09These stars become quite large just before they completely start running out of fuel.
11:15The sun too will completely lose its fuel someday.
11:19But don't worry, that won't happen before 5 billion years.
11:25Blue Giant Stars.
11:27As the name suggests, these are big stars and hence burn at a high temperature.
11:33Leaving them with a short span of life.
11:37From 10,000 to 100,000 years.
11:41Most of the stars you see in the sky are Blue Giant Stars.
11:45When these stars die, unlike other stars, they don't shrink but explode.
11:51And this type of explosion illuminates the entire sky.
11:58There are all sorts of other stars like Giant and Super Giant Stars.
12:03Which are extremely big, have the shortest life span and shine the brightest.
12:11TRIVIA TIME!
12:13Every star that you see in the sky is actually bigger than the sun.
12:19Proxima Centauri, a Red Dwarf Star, is the nearest star to Earth after the sun.
12:26So, remember the question I asked you?
12:29How many stars do you think are there in the universe?
12:33Well, the answer is 100 billion!
12:37Isn't that a shocker?
12:41I can see stars in your eyes.
12:44So this is me zooming out.
12:48Whoa! Whoops!
12:50I got to be more careful.
12:52Oh, hello friends. I am in space today.
12:58But you know why?
13:00To tell you about these magnificent solar objects.
13:05Whoa! Comets! Let's zoom in.
13:11Comets are one of the most rare objects in the solar system.
13:15Often known as the dirt balls of the solar system.
13:19That's because they are made of dust and ice, wrapping themselves around a small rocky core.
13:28Astronomers believe that comets are leftovers from the beginning of the solar system.
13:35But hey, they don't look like leftovers at all.
13:39They appear magical when they reflect light from the sun.
13:43That's right! Comets do not have their own light.
13:47They are reflectors of light.
13:51When a comet travels towards the sun, the radiation and heat cause solar winds.
13:58Which often blow the gas and dust of the comet.
14:02And therefore, it appears as if the tail is behind the comet.
14:07And when the comet travels away from the sun, the tail is formed in front of the comet.
14:17Well, have you ever wondered where are comets usually found?
14:22Yes, yes, they do orbit around the sun mostly.
14:26But they spend billions of years in the Kuiper Belt or in the Oud Clouds.
14:33The Kuiper Belt is found beyond the orbit of Neptune.
14:38The Oud Clouds are found in the outermost reaches of the sky.
14:43And comets live here because it's cold here.
14:47Unfortunately, they don't live long once they enter the warmer part of the solar system.
14:54Travelling through the inner solar system eventually kills them.
14:59And after several thousand years, they melt.
15:06TRIVIA TIME!
15:07I know you wouldn't, but if you ever plan to go inside a comet..
15:13..you'll be hit by microscopic pieces of dust.
15:17The name comet was given by Aristotle.
15:20Meaning, hair of the head.
15:25Hey, all my teeny tiny friends.
15:28The most famous comet, the Halley's Comet will appear in the sky in 2061.
15:36But don't worry, you don't have to wait that much to see me the next time.
15:43This is me zooming out.
15:46Oh, it's dark here.
15:49And I can't see you.
15:51Oh wait!
15:53Hey there!
15:54Wonder what we do without lights, right?
15:58So come on, let's talk about light today.
16:02Zoom in!
16:05Light is a form of energy made of photons.
16:09A photon is the smallest unit of visible light.
16:13Now you ask me, how does light travel?
16:16Well, light is unique as it behaves both like a particle and a wave.
16:23That behaves differently with different kinds of matter.
16:27If light hits an object and passes through it..
16:32..that object is known as a transparent object.
16:36Let's do one thing, take a glass of water.
16:39Let's do one thing, take a glass of water and switch on a torch.
16:45See the light passing through?
16:47Well, this proves that water is transparent.
16:52There are certain objects through which light cannot pass.
16:56And it changes its path after hitting the object.
17:00These objects are called opaque objects.
17:04Such as wood, the mobile you are using right now.
17:09And you as well.
17:11Yeah, humans are opaque as well.
17:15Some objects allow light to pass through them partially.
17:20And they are known as translucent objects.
17:23Such as plastic, butter paper and frosted glass.
17:29And do you know what travels the fastest?
17:33No, not a space rocket.
17:36Well, it's light.
17:38In vacuum where there is no obstacle..
17:41..light travels at a speed of more than 0.1 million miles per second.
17:47Okay, so the distance between the sun and earth is 93 million miles.
17:54But it takes only 8 minutes for light to reach the earth.
17:58That's a whooping speed, isn't it?
18:01When light travels through different mediums, it slows down and sometimes bends.
18:08And this bending of light is known as refraction.
18:12Take a beaker filled with water and place a pencil in it.
18:16Now look carefully.
18:18Do you see a bend in the pencil?
18:22No, no. The pencil didn't bend.
18:25The light rays just got refracted.
18:29That's why you see the pencil bent.
18:33Trivia Time!
18:35Did you know that humans are bioluminescent?
18:38Which means that they emit light.
18:41But their glow is 1000 times weaker than what the naked eye can register.
18:49Light takes approximately 1.2 seconds to reach the moon from the earth.
18:56So friends, did I not light up your tickling brain cells today?
19:04Hi friends, did you just see that mighty beast?
19:08Well, that's a shark.
19:12Hey, that's not done. I'm no beast, Dr. Binox.
19:16I mean, look at my voice and look at me. I'm a tiny little being.
19:20Oh, I'm sorry, Mr. Shark. I was kidding.
19:24I know you're not a beast, but a lot of people think you are.
19:29So why don't you clear that myth to us?
19:32So why don't you clear that myth today, my friend?
19:35That's a good idea.
19:38Friends, wanna bust some myths about sharks today?
19:41I know you do. Come, zoom in.
19:45It is said that most sharks are man-eaters and they deliberately hunt humans.
19:51Which is not completely true.
19:55Most sharks tend to eat fish or invertebrates, such as squids or clams.
20:02If sharks happen to kill humans, it's mostly because of mistaken identity.
20:08Sharks mostly mistake humans to be some fish or another animal.
20:14I'm sure you would have heard that sharks have lots and lots of sharp pointed teeth.
20:20Well, not all sharks have icicle like teeth.
20:25The basking shark has tiny teeth, which it does not even use for hunting or feeding.
20:33And the horn shark has molar like teeth, which is used to crush its hard-shed prey.
20:39It is often believed that sharks are indiscriminate killers.
20:44But most of the times, they are victims of massive hunting for their fins..
20:50..which is made into shark soups.
20:54Whoa! Whoa!
20:57People claim that shark fins are tasty and have a lot of nutritional value.
21:03Which is absolutely untrue.
21:06Shark fins are tasteless with absolutely no nutritional value.
21:13And if you think sharks have no predators, you're wrong.
21:18Humans are their biggest predators.
21:22If you actually look at numbers, you'll be surprised to know..
21:26..that sharks kill approximately 6 humans in one year.
21:30Whereas, humans kill about 100 million.
21:35Now, that's called being indiscriminate.
21:39Sharks also help a lot in maintaining the balance of life.
21:44Since they are the top of the food chain, they keep the marine population in check.
21:50Trivia Time!
21:51There are approximately 500 species of shark.
21:55Out of which, White Sharks, Tiger Sharks and Bull Sharks are the most dangerous ones.
22:02Sharks have an extremely strong sense of smell.
22:06Almost 2 thirds of its brain is dedicated to the sense of smell.
22:11So friends, now you know that sharks are a lot more than their scary teeth.
22:18You're right, Dr. Binox. Thanks for clearing the silly myths about me.
22:23I owe you one.
22:24Oh, come on. Let's drink some soup.
22:27Oh, really? Soup?
22:30Not shark fin soup.
22:34Oh, there you go.
22:37So, this is me zooming out.
22:41Hello, kids.
22:43Won't it be great if we could just pack our bags and keep flying from place to place?
22:48Hey, but you can't do that because you don't have wings like me.
22:54Oh, yes, you're right.
22:56But there's one major difference between you and my friends out there.
23:00And that is?
23:02You're a migratory bird, silly.
23:05Oh, oops. Why didn't that strike me?
23:09Doesn't matter. You go take your flight.
23:12And I'll tell my friends all about birds like you.
23:16Oh, I feel so special, Dr. Binox.
23:21Come, friends. Let's know more about migratory birds.
23:26Zoom in.
23:28Migratory birds are those birds that travel from one place to another..
23:32..at regular intervals over long distances.
23:36And they migrate to escape the cold, harsh winter weather..
23:41..in search of food and a warm, cozy shelter.
23:45There are various types of migratory birds.
23:48Resident birds, pigeons and doves are good examples.
23:54These birds just don't migrate.
23:57They are able to find food and a warm shelter where they are staying.
24:02We might not travel a lot, Dr. Binox.
24:05But we do spread love all around from place to place.
24:10Short Distant Migrants
24:13Robins are short distant migrants.
24:16As the name suggests, these birds move only a short distance..
24:21..from lower elevations to mountain side.
24:24Hey, but don't you mistake me for a nightingale.
24:29I might look like one, but I'm not, okay?
24:32Oh, my friends won't. They are very smart.
24:35Aren't you guys?
24:38Medium Distant Migrants
24:40These birds travel over distances that cover several states.
24:45They don't really travel a lot, but not that they won't travel less.
24:50Isn't it, Mr. Bluejay?
24:52Hmm, you seem to know me quite well, Dr. Binox.
24:56But there's one more secret about me. Wanna know?
25:00Sure, tell us. We are all waiting.
25:04Hmm, I'm quite mischievous, Dr. Binox.
25:07Because I hunt more than I can eat.
25:12Long Distant Migrants
25:14These birds travel typically from United States and Canada..
25:18..to wintering grounds in Central and South America.
25:22The Arctic Tern is an example of Long Distance Migrants.
25:27And I am the record holder for covering the longest distance of 44,000 miles.
25:34Oh, my! That's huge!
25:37Just to let you know, the circumference of the Earth is approximately 29,000 miles.
25:45So, imagine how much these birds travel.
25:49Trivia Time
25:51Before migrating, many birds enter a state of Hyperphagia.
25:55Where the hormone levels compel them to drastically increase their body weight..
26:00..to store fat to use as energy while travelling.
26:05And some birds also have the ability to sense the Earth's magnetic field..
26:10..to help them navigate.
26:13So, I need to travel now. Wait till I come back next.
26:19I feel plants are the nicest beings on this planet.
26:23They never harm anyone.
26:25Rather, they get eaten all the time.
26:28Oops! I guess some eat too.
26:32And that's why I am here today to tell you about plants that eat meat.
26:39Come with me. Zoom in!
26:42Plants that capture preys such as insects, spiders, mites and eat meat for their survival..
26:49..are known as Insectivorous or Carnivorous plants.
26:53Most of the Carnivorous plants live in wet, foggy areas..
26:58..where the soil doesn't have much nutrients.
27:01They derive their nutrients from their preys..
27:05..and whatever little nutrients available to them through soil.
27:10They have a strong digestive system which helps break down complex food items.
27:16The different types of Carnivorous plants are..
27:21Pitfall Traps, popularly known as Pitcher Plants.
27:26They are Pitcher Plants because they look like pitcher-shaped vessels filled with fluid.
27:33The insect is lured by the syrupy fluid..
27:36..and just when they come to drink it, they get drowned.
27:40Some Pitcher Plants have a lid on them to trap their preys.
27:46Flypaper Traps.
27:48Some Flypaper Traps have leaves covered with a sticky substance..
27:53..on which the prey gets caught.
27:55These plants also digest their preys through their leaves.
28:01Other kind of Flypaper Traps use tentacle-like stalks covered with glands..
28:06..to trap and digest insects.
28:09Their stalks have digestive soup on them to absorb the nutrients.
28:15Snap Traps.
28:17Venus Flytrap is the most popular Snap Trap.
28:21Here the plant has mouth-like leaves that literally snap shut..
28:26..when an insect or spider lands on it.
28:31There are some Snap Traps that are found underwater.
28:35And they are known as Waterwheel Plants.
28:38They do the same thing but underwater.
28:43Bladder Traps.
28:44Plants of this kind work in the most interesting way.
28:48Where there are sacks on the plant known as bladders..
28:53..that create vacuum and suck the insect to digest it later.
28:59Lobster Pot Traps.
29:01The plant first lures its insects with its sweet smelling nectar.
29:07Once the insect is trapped inside, it sees light shining through the leaves..
29:13..which looks like exits.
29:15To escape, the insect travels towards the light..
29:19..which is nothing but another trap.
29:23This is the plant's way of actually misdirecting the insect..
29:27..to the inside of the pitcher..
29:29..where it is caught and eaten by the digestive liquids.
29:33Trivia Time.
29:36Some pitcher plants are so large, they can catch and consume rats and frogs.
29:43Some carnivorous plants reflect ultraviolet light to attract their preys.
29:50Hey, don't go there!
29:52Wait, I'll help you.
29:56Let go!
30:00So, this is me zooming out.
30:05Oh, who's that?
30:07Hey, you're disturbing the air around us.
30:11Sorry, I know I'm farting a lot today.
30:15Oops!
30:16Hmm, guess you took in a lot of carbon dioxide for lunch yesterday.
30:21Yuck, could be.
30:24Did you just hear them, friends?
30:27Oh no, not their farts.
30:30And that reminds me that I need to tell you about the process of excretion in plants.
30:37Come with me.
30:38Zoom in!
30:40Just like humans, plants do feel the need to remove..
30:43..all sorts of waste material from their bodies.
30:47However, plants have a much simpler process of excretion.
30:52Hey, did you know that plants sweat?
30:55Well, yes.
30:57Just like humans have sweat glands, plants have small openings under their leaves..
31:03..called stomata that release water and oxygen.
31:08Just how the pores of your body release sweat.
31:12But, their waste material is a lot more useful than ours.
31:20Plants also release waste by accumulating it in the vacuoles of aging leaf cells.
31:27The leaves then fall off, eventually removing the waste material.
31:32This process is known as abscission.
31:36Don't you sometimes have dry skin that eventually falls off?
31:42Yup, kinda same.
31:44Have you noticed leaves changing their colour in autumn?
31:48This happens mostly because of the waste pigments..
31:52..that start getting stored inside the leaves.
31:56See the sticky fluid?
31:58Well, this is another kind of waste produced by the plants..
32:03..which is often oozed out from the bark of trees.
32:06Apart from the sticky fluid, there are other waste products..
32:11..like resins, gums and latex.
32:15But hey, you got to be careful because sometimes these products can be poisonous.
32:22But most of the other times, they are quite useful.
32:26For example, latex is used to produce gloves and clothing.
32:32TRIVIA TIME!
32:34The bark of a willow tree produces a chemical that helps in the making of aspirin.
32:41A medicine for pain and fever.
32:44Oak leaves turn brown due to the waste material in them.
32:49So friends, plant more and more trees.
32:52Because they are the reason why you can breathe.
33:01Breathe in, breathe out.
33:03That's what I say throughout.
33:06Breathe in, breathe out.
33:08That's what I say throughout.
33:14Oh, so you've been watching me work out, eh?
33:18Rather, breathe in and breathe out.
33:21Oh, this is tiring.
33:23So anyways, why don't we talk about breathing today?
33:28Still can't get a hint?
33:30Well, today we talk about the human respiratory system.
33:35Zoom in!
33:37Alright, do this.
33:39Right now, I'm watching you.
33:42Just start running wherever you are.
33:45Run! Run! Run! Run! Run! Run!
33:49Now stop!
33:50Isn't your breathing heavy?
33:52Well, that's because right now your body needs more oxygen to breathe.
33:58And you get oxygen from the air around you.
34:02Without oxygen, you'd be like a car without fuel.
34:06A waterless pool.
34:09And wouldn't that be uncool?
34:12One of the major reasons why you're alive is oxygen.
34:17So, take a deep breath in.
34:22When you breathe in, you take in oxygen present in the air.
34:26The air then passes through your nostrils.
34:30There are tiny hair present in your nostrils that obstruct..
34:37..all the dust particles.
34:39Then the air travels through the windpipe, also called the trachea.
34:46Which filters the air inhaled.
34:48The trachea branches out to two tubes called bronchi.
34:53Where tiny hair called cilia move back and forth, moving the mucus inside.
34:59The mucus is a sticky substance that collects germs and other particles..
35:05..that might harm the lungs.
35:08The bronchi then carry air into each lung.
35:12The right lung has three lobes, whereas the left lung has two lobes.
35:18The left lung is slightly smaller in size to give space to the heart.
35:24These lobes are filled with small and spongy air sacs called alveoli.
35:30Where the exchange of oxygen and carbon dioxide happens.
35:35It is here the blood picks up oxygen and lets go of carbon dioxide.
35:41Just beneath the lungs, there is a dome shaped muscle called diaphragm.
35:47That contracts when you breathe in and expands when you breathe out.
35:53It also separates the chest cavity from the abdominal cavity.
35:59Trivia Time!
36:02The lungs are the only organs that can float on water.
36:07A person breathes approximately 20,000 times in one day.
36:13So friends, didn't you just gasp and grasp all the facts?
36:20This is me Zooming out!
36:26Happy Halloween my friends!
36:31Hmm, I know it's not Halloween today.
36:37But can you guess what I am going to talk about?
36:41Yes, that's right! Bones!
36:46Zoom in!
36:48Hey, don't be scared. That's not a ghost.
36:51That's just how your skeletal system looks like.
36:54Come, let's talk a little more about the bones in your body.
36:59Let's start with the head.
37:03Cranium. This is the cranium.
37:07It protects the brain from bumps and knocks.
37:13Mandible. The lower part of the skull is called the mandible.
37:19It is the largest and the strongest bone of your face.
37:24Scapula. It is a triangular shaped bone that is protected by surrounding muscles.
37:32It is commonly called the shoulder blade.
37:36Ribcage. The ribcage protects your heart and lungs.
37:41It is actually very delicate and can be damaged by accidents, spots or even a powerful sneeze.
37:54The arm consists of three large bones.
37:59The humerus bone forms the upper arm.
38:03The radius and the ulna are the two bones which form the lower arm.
38:08You have one radius and one ulna in each arm.
38:12The radius and ulna bones connect between the elbow joint and the wrist.
38:18Your palm consists of three groups of bones.
38:22Carpals, Metacarpals and Phalanges.
38:27Femur. The femur or thigh bone is the longest, heaviest and strongest bone in the entire human body.
38:37All of the body's weight is supported by the femurs during many activities.
38:42Such as running, jumping, walking and standing.
38:52Patella. The patella is also known as the kneecap.
38:58It is a thick circular triangular bone which covers and protects the surface of the knee joint.
39:05Fibula. The fibula is the outer and thinner bone of the lower leg.
39:12Its main function is to provide attachment for muscles.
39:16However, it doesn't give much support and strength to the leg.
39:21Tibia. The tibia is a large bone located in the lower leg of the human body.
39:28It is also known as the shin bone and is the strongest weight bearing bone.
39:34Just like your palm, your foot also consists of two groups of bones.
39:40Tarsals and Metatarsals.
39:47Did you know that half of your body's bones are in hands and feet?
39:55And an infant has 300 bones whereas an adult has 206 bones.
40:04This is because some smaller bones fuse together to form bigger bones.
40:10Okay kids, got to go now.
40:15Hey, hello friends.
40:22Oh no! I guess that's a tsunami.
40:28Come, let me tell you all about it.
40:31Zoom in.
40:33Tsunamis are caused by sudden movements of the ocean floor due to earthquakes.
40:39Landslides on the sea floor.
40:43Land slumping into the ocean.
40:46Large volcanic eruptions or a meteorite crash on the ocean floor.
40:53When an earthquake, a landslide or a volcanic eruption occurs on the sea or ocean bed..
41:02A vertical jolt is created which displaces the bed and causes extreme tension in water.
41:11The water is pushed upwards but gravity tries to pull it down.
41:17This causes an upsurge in the water levels and the waves start moving away from the point of tension.
41:25Tsunamis are barely felt as a ripple on the ocean surface as the water is quite deep.
41:33But as and when those waves reach the land, the water becomes shallower.
41:39And the waves constantly increase in height.
41:43They hit the shore and oh my, cause a lot of destruction.
41:50It is said the first wave of a tsunami is not the strongest.
41:55But the successive waves are bigger and stronger.
42:00Oh! And tsunamis can travel at a speed of about 500 miles per hour.
42:07Which is almost as fast as a jet plane.
42:11And that's why tsunami waves are called killer waves.
42:16Deadly, isn't it?
42:18Trivia Time!
42:20Did you know that a tsunami wave can be less than 30 cm in height and can pass off unnoticed?
42:28If you get stuck in a tsunami, don't swim.
42:31Because the currents will pull you in the opposite direction.
42:35Just hold on to a floating object and be safe.
42:40So here's the deal, go watch this video to know more about earthquakes.
42:44After all, that's one of the major causes of a tsunami.
42:49This is me zooming out.
42:57Hello! It's quite windy today.
43:00So I thought I'll take a quick flight.
43:05It sure is windy.
43:09Oh no! It's a storm.
43:11You mean hurricane.
43:13Hurricane, storm, whatever, just run.
43:17You mean fly.
43:19Oh forget it, just come Dr. Binocs.
43:22Oh okay, well that reminds me that today's topic is hurricane.
43:28Zoom in.
43:30Whoa!
43:32A hurricane is a huge storm that generally forms over warm ocean waters near the equator.
43:39The warm air above the ocean rises upward.
43:43Thus creating an area of low pressure below.
43:47Air from the surrounding areas push in and try to fill the area with low air pressure.
43:54Which now becomes warm and moist and rises too.
43:59As the moist air rises, the surrounding air again tries to fill in.
44:04And this process continues till the water in the air forms clouds.
44:10Soon the clouds and winds spin around, fueled by the ocean's heat and water vapor.
44:18Therefore, hurricanes could also be called giant engines that use warm and moist air as their fuel.
44:26When we see from the top, hurricanes can be as huge as 300 miles wide.
44:33The center of the hurricane is called the eye of the hurricane, which is the calmest part.
44:41The eye wall surrounds the eye where the most damaging winds are found.
44:47It can range anywhere from 5 to 30 miles.
44:52Then comes the rain bands which surround the eye wall.
44:56These bands are a series of dense clouds that give a pinwheel like appearance to the hurricane.
45:04Which range from 50 to 300 miles.
45:09Hurricanes are divided into 5 categories, depending on the speed of their wind.
45:16Here, take a look.
45:18Category 3, 4 and 5 are the most dangerous ones.
45:24Trivia Time!
45:27A huge hurricane can release energy equivalent to 10 atomic bombs per second.
45:34Hurricanes in the Pacific Ocean are known as Typhoons.
45:40Woah! So this is me zooming out.