How does Water get inside a Coconut? + more videos | #aumsum #kids #science #education #children

It's AumSum Time. How does water get inside a coconut? Simple. I put it inside using magic. Oh AumSum. To buy AumSum merchandise visit AumSum.com. Firstly, roots of the coconut plant absorb water from the soil by a process called osmosis. This water is then transported to different parts of the coconut plant. Some of it reaches the coconut. The liquid which eventually reaches the coconut is referred to as the endosperm. This endosperm acts as the food or nourishment for the coconut's growth. Now, a part of the endosperm gets converted into a creamy tissue. And gets deposited on the coconut's inner surface. Over a period of time, this creamy tissue turns hard. And the remaining endosperm ends up as coconut water. So this is how water ends up inside a coconut. Topic Bad Conductors of Heat. Why are two thin blankets warmer than one thick blanket? Because two chocolates are better than one. No. To understand this, we need to first learn about bad conductors of heat. Bad conductors of heat are the materials which do not allow heat to easily flow through them. Air, wood and glass are some examples of bad conductors of heat. In these examples, is our train conductor included as well? Just listen. A thick blanket allows much of our body heat to escape into the atmosphere. However, when we use two blankets one on top of the other, air gets trapped between them. This air being a bad conductor of heat does not allow our body heat to easily flow into the atmosphere. Thus keeping us warm. Topic, Wavelength. Why red is used as a danger signal? Oh well, because my teacher said so. As usual, you are wrong. The major reason for red to be used as a danger signal is its wavelength. Yeah yeah, I know. Wavelength is the distance between two sea waves. No. In the wave theory of light, the distance between successive crests or troughs is called wavelength. Longer the wavelength, lesser will be the scattering of light. Now, among the colors of visible light, red has the longest wavelength. Hence, it is least scattered by the atmospheric particles. As a result, whether it is fog or smoke, red light passes comparatively easily through them. Thus, it can be seen from maximum distance, making red color the right choice to convey any danger. Topic, Nerves. Why don't we feel pain when we cut our hair? Well, duh. Because if it would, then we would have got angry on our hairdressers. Oh, you are just impossible. Wait, I will explain it to you. Inside our body, there is a network of nerves. These nerves help us to sense our surroundings and feel pain, touch, etc. By sending messages to the brain. So, do the nerves of my hair not know how to send a message? No. Generally, the part of our hair above the skin is made up of dead cells. It does not have any nerves. Hence, when we cut our hair, due to the absence of nerves. Our brain does not receive any messages of pain. As a result, we don't feel any pain. Topic, Transpiration. Why do cacti have spines? Maybe they want to look like porcupines. Very funny. Spines help cacti to reduce transpiration. Well, I know all about vibration. But what's with this new thing called transpiration? Transpiration is the loss of water from aerial parts, like stems and leaves, in the form of water vapor. These aerial parts contain stomata which allow water vapor to escape into the atmosphere. So, shall we tape the aerial parts so that the vapor won't escape? Oh, pay attention. In deserts, where cactus usually grows, there is scarcity of water. Also, due to high temperatures, the rate of transpiration is very high. Thus, the leaves of a cactus have modified into spines. Spines don't have stomata. Thus, the rate of transpiration is reduced, helping the cactus to save water. Topic, Respiration. Why should we not overwater potted plants? Well, duh. It's because the water will overflow and make the floor dirty. No. Leaves of a plant take in oxygen from the air present in the atmosphere. While, the roots, being buried in the soil, take in oxygen from the air present in tiny spaces of the soil. When we overwater a potted plant, the air in the tiny spaces gets replaced by water. Yikes. So do the roots know how to swim in water? Please listen. As air gets replaced by water, the roots do not get sufficient oxygen to breathe and they begin to rot. This may adversely affect the growth of the plant. Thus, we should always try to supply adequate water to the potted plants and not overwater them. Topic, Latent heat of vaporization. Why do wet clothes feel cold? Because. I don't know. It is because of latent heat of vaporization. Latent heat of vaporization is the amount of heat energy required to change a unit mass of liquid into vapor. Now, the value of latent heat of vaporization of water is very high. Is it higher than Mount Everest? No. The latent heat of vaporization of water is about 22.6 x 10 to the 5th joules per kilogram. Oops. This means it is smaller. Please listen. This means only 1 kilogram of water requires 22.6 x 10 to the 5th joules of heat energy to change to vapor. Now, when we wear wet clothes. The water present in them absorbs quite a lot of latent heat from our body and evaporates into the atmosphere, making us feel cold. Topic, Ignition temperature. Why does a match light when you strike it? Why don't you use a match instead? You will be able to light the bonfire easily. No. I don't believe you. Try it. Look. I told you. Dude. That was awesome. This happened because of low ignition temperature. Ignition temperature is the lowest temperature at which a combustible substance starts burning. Lower the ignition temperature, more easily will it catch fire. Now, a match head contains antimony trisulfide and potassium chlorate. Enough. I know how to use it now. No. The match will not light on any surface. The rubbing surface of a matchbox has powdered glass and red phosphorus. On striking the match against it, friction is caused. Friction generates heat, converting red phosphorus to white phosphorus. White phosphorus has a very low ignition temperature. It immediately ignites in air, producing heat and light, thus beginning the process of combustion. The heat produced breaks down the potassium chlorate present in the match head, releasing more oxygen. This oxygen combines with antimony trisulfide which is also in the match head and keeps the flame burning. Topic, Speed of sound. Why does sound travel faster in summer than in winter? Wow. That was an amazing trick. The television switched on immediately after you clapped. Yeah yeah, I know. This is one of my favorite tricks. Now, I bet you that the television will not switch on instantly after you clap. This time, I am going to prove you wrong. See, I told you. Oh, I lost again. Do you know why the sound took more time to reach the television? This is because the speed of sound decreased. Speed of sound depends on the temperature of the medium. Higher the temperature of the medium, more will be the speed of sound and vice versa. So, in this case, what do you think is the medium? Are you kidding me? I don't know. No problem. I will tell you. In this case, air is the medium. During summer season, the temperature of air increases. At higher temperature, the molecules of air have more kinetic energy. Hence, they vibrate faster leading to increase in speed of sound. Now, during winter season, the temperature of air decreases. With the decrease in temperature, the kinetic energy of the molecules also decreases. Hence, the molecules do not vibrate much. As a result, the speed of sound decreases during winter season.