Best Learning Video for Kids- Teach Toddlers _ Fun Preschool Learning Videos_HD
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
ЁЯУЪ
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.