"From the experiment I just did, you must understand the magic of this world, to understand the changes of various substances in this world, to have a pursuit mentality, not to keep certain things unchanged, to learn to change, to learn to discover, so that the world will become better in the future."

Of course, Fang Jing knew very well that behind the science of this experiment, there would be a scientific and technological tree, extending all kinds of branches and various disciplines.

All the students were curious, curious about the experiment that Fang Jing did, and thought that they would try it when they went home, if this was the case, it was estimated that a fat beating would be indispensable, and whose salt was not blown by the wind, but it was all precious, not like Fang Jing, who used it for experiments at will.

During the break after class, Mr. Yu Li approached Fang Jing and chatted with him, although he couldn't get to the point, but he was a little strange about Fang Jing's teaching methods and teaching mode, but he was curious about the experiment, and asked Fang Jing where was the principle of this experiment?

Although all three gentlemen were Confucian students, that didn't stop their curiosity.

"I teach these things to my students, just to inspire them this mode of thinking, not really to teach them much, with this kind of exploration of the idea exists, in the future they will be able to discover and explore the things they love." Fang Jing said to the three gentlemen.

"Mr. Fang, the Fang Family School is divided into three classes, is it that the older students will no longer study after only a few years? And to teach specifically younger students? How about giving them time to go to school? So that students can learn more about your lectures, discover or explore something? Yu Li originally disagreed with the original idea of teaching in the Fang Family School, but now it seems to be right.

"Mr. Yu, for the division of classes in the school, this is just a matter of no way, the age of the students is different, the big one can be said to be a mother-in-law in a few years, it is naturally impossible to read more books, of course, as long as his family agrees that he will come to study, and if the study is good enough, I agree that they will continue to study in the future, and other younger students are just when they enter the school, so it is also convenient to teach them."

Fang Jing's practice of dividing classes has ideas for the future, but it will not be changed because of who comes, and it is impossible to change the existing model because of certain things, not to mention, there are nearly 100 little babies in Fangjia Village, and there will be more little babies who need to enter the school to study in the future, and they will naturally be taught in the class.

"Well, Mr. Fang is thoughtful, but for now, the students of the Fang Family Academy, including the princes and county lords from Chang'an, can still go to school for a few years, and in a few years, there will be more young children in Fangjia Village, and the population of Fangjia Village will also increase, and the number of students in the school will also be guaranteed, Mr. Fang is thoughtful." Qin Shu said, and Zhang Ze also nodded on the side.

The second class in the afternoon began, Fang Jing's class was naturally an experiment again, Fang Jing took a beaker from the basket, poured some water, took a red candle and lit it, and put it into the beaker.

"Ladies and gentlemen, please note that I poured some water into this cup and lit a candle in it, and the flame of the candle was lit at this time, so I would like to ask, when this candle burns to the end, will this fire be extinguished?" Fang Jing asked the people in the classroom.

"Sir, this candle burns to the end, and when the heart of the candle reaches the surface of the water, it will naturally be drowned by the water." Qingque stood up and responded.

"Well, what Qingque said is right, when this candle burns to the last surface of the water, it will naturally be drowned by the water, so, this cup in my hand, what about when I cover this candle?" Fang Jing continued to ask.

"Mr. Fang, after this cup covers this candle, it will inevitably be extinguished." Yu Li responded loudly to Fang Jing's question.

"Okay, then, then, I have to ask, when this cup in my hand covers this candle, the candle will also be extinguished, so is the water mark in this cup that I am covering the candle the same as the water mark in this cup outside? Or is it different? Fang Jing asked everyone in the classroom.

"Sir, the water mark of the outer cup and the inner cup are naturally the same, and it is impossible to change." The blue finch responded.

"Mr. Fang, after this candle is extinguished, no matter what, this water level will naturally not change." Zhang Ze also responded.

"......" everyone responded to Fang Jing bravely.

"Okay, everyone, please sit down, and I will let you witness the miracle in a moment." Fang Jing pressed his hand and asked the students and gentlemen who had just stood up to answer to sit down.

Fang Jing took some light blue paint and poured it into the water, which made the color of the water change, which made it more convenient for everyone to watch, picked up the cup and slowly put it into the outer cup, after a while, the candle went out, the water in the outer cup was sucked into the inner cup, and the water level rose.

"How is this possible? How can it be? Yu Li got up excitedly and shouted.

"I must have seen a miracle." Qin Shu also stood up and shouted.

"It's amazing." The students were talking to each other.

"......" Many people whispered, asking each other what was going on.

Fang Jing stood quietly on the steps of the podium, looking at everyone in the classroom, without speaking or speaking, waiting for the silence in the classroom.

"Why, sir?" Qingque stood up and asked Fang Jing.

"Qingque, sit down first." Fang Jing pressed his hand and asked Qingque to sit down.

"As you have just discovered, when the inner cup covers the candle, the candle is extinguished after a while, and then as soon as the fire is extinguished, the water in the inner cup immediately rises, which is very simple to say, but it is also the most difficult to prove or understand."

Fang Jing was doing this experiment with the people in the classroom at this time, which can be regarded as a siphon experiment, which is easy to say, but it is very difficult to prove.

"When the candle burns, it needs to consume something in the air, and some things in the air are also needed by us humans, animals, and plants, which is called oxygen, and the burning of the candle also needs the oxygen in the air, and the air in the lungs inhaled by people also contains oxygen, and when people leave oxygen, just like this candle, the lamp goes out and people die."

"This candle consumes the oxygen in the air, so the air is naturally lacking this oxygen, so the water in the inner cup naturally needs to be replenished to fill the oxygen just consumed, which is why after I put the inner cup in the hood, the fire of the candle will be extinguished, and the water level will rise, do you understand?"

Fang Jing won't talk about any pressure for the time being, otherwise, this group of students may not understand what pressure is, and Fang Jing is even more difficult to explain, just do a few experiments to make the students interested, and it will also make it easier for them to trigger some thinking and hobbies in the learning process in the future.

"What is this air, sir? So why doesn't this water fill the inner cup directly? Why is only a small portion filled? "Qingque is the most puzzled, and it can be regarded as the smartest, so when it comes to asking questions, it basically goes straight to the point.

"Qingque's question is very good, to speak, the air we breathe, contains oxygen, but also contains a lot of other gases, such as the gas we exhale, it belongs to one, and the proportion of oxygen in this air is only about 20%, so this water level can only rise a little, and can not completely fill this inner cup, so, what is the use of other gases? That naturally has other functions. ”

Fang Jing had read a lot of books, and when compiling the textbooks, Fang Jing had done his homework for a while, otherwise, Fang Jing would not have been able to tell so many things, at least what he taught to the students should be easy to understand and step by step, otherwise it would be easier to be confused.

"Sir, what are the other gases you just mentioned? What does it do? Qingque is a person who wants to explore without knowing it, not to mention Fang Jing's experiments, which drove his curiosity to learn, and made him want to know more about these magical experiments and things.

"Kong Ming lantern, everyone should have seen it, when the fire burns, the gas produced is called helium and some other gases, and helium is the lightest gas, which can drive the Kong Ming lantern to fly far away, and when the fire burns, it consumes oxygen and produces other gases, and helium is also one of them, of course, there are other gases produced, these need to be studied and discovered by you in the future, but I can't tell you"

Fang Jing pretended to be mysterious, only half of the lecture, to arouse the students' thinking, to think, to study, to experiment, if you directly finish everything, then it is better to directly send a book to the students, you go to see it yourself, to learn, if so, it will not be able to guide the students.

Whether it was the students in the classroom, or the gentlemen, they were all immersed in Fang Jing's experiment just now, and they were also immersed in this vast knowledge, there was no noise, there was no sound of ear to ear, quietly thinking about everything that happened just now, maybe through such a small experiment of Fang Jing, a big scientist could also be lured out, these are unknown.

Subsequently, Fang Jing said a lot of things, and also made a summary of the two experiments this afternoon.

"Anything, don't look at the surface, you have to discover and explore through the surface, in order to know its origin, if you know its origin, you can know a sentence of Buddhism, a leaf and a world, for example, if we see a leaf, if it is magnified to tens of thousands of times, what is inside the leaf? It must be different things that make up a leaf, just like a city, made of different bricks, tiles, mud, stones, etc., and the same is true of leaves. ”

"In the future, you will be literate and read, taught by three gentlemen, I will only teach you these small experiments, let you know that there are more magical things in this world, when you have taken my class for a few years, maybe you will remember today, maybe by then, some of you will become masters, maybe some of you will become officials, maybe some of you will become gentlemen, but you must remember that exploring any kind of substance in this world will change yourself, okay, after class, after school."

After Fang Jing summed up, she directly announced the end of class, which could be regarded as the end of a week's study time, so that the students could relax for two days.

Fang Jing waited for the students to salute him, and then left in line with his schoolbags, and finally carried the basket himself, and left the school with the three gentlemen and the father and son of Muramasa.

"Jing Wazi, what are you putting in your head? Today, you scared us a lot, this is also in the Fang Family Academy, don't go out to talk about these things in the future, otherwise, you will be spit on and drowned by the literati. The village is telling Fang Jing, if you really want to talk about it, these things that Fang Jing talked about are really not recognized by the world, not to mention the Tang Dynasty, which took Confucianism as the way.

"Don't worry, I'm just talking about this in the Fang Family School, and I won't say anything when I get out of this." Of course, Fang Jing understood how anachronistic what she was talking about.

After returning home, Fang Jing was surrounded by a large number of little babies, waiting for Fang Jing to explain to them or redo the experiment.

"Brother, I want to see the experiment just now, I want to see it." Fang Yuan and Lizhi jumped in front of Fang Jing and shouted loudly.

"Don't surround me, wait for the experiment to be done in a few days when I have another class, and go back to the back room to write." Fang Jing ignored this group of small and large children, and carried the basket to the miscellaneous house.

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