Han Cheng's affirmation and praise made Shi Tou's face, which had turned red due to excitement, even redder.
At this moment, his heart was filled with joy, just like many years ago when the Son of God came to teach them how to write and speak Mandarin. He always did it quickly and well, and was therefore praised by the Son of God.
Those who were confused and seemed to have grasped something but could not grasp it completely, after listening to the words of the stone, and carefully recalling the scene when the Son of God held the fruit and slowly turned it, the things that they could not grasp before now suddenly became clear.
Yes, that is because the earth rotates from west to east, so the sun is seen first in the east.
As the earth continues to rotate, in their eyes, the sun is constantly moving westward. When the location of their tribe moves to a place where the sun can no longer reach, the sun disappears.
So this is why there are day and night!
It turns out that the sun rises in the east and sets in the west, not because the sun itself is moving, but because the earth on which we live is rotating!
Many people looked enlightened, as if a brand new door had opened before them.
At the same time, their vision was no longer limited to the small piece of land they already knew, but expanded to a very large area.
When they cast their eyes toward the sea of stars, learned these extremely amazing secrets, and understood what the earth they lived on was like, when they looked back at the place where they lived, they felt that it was not that big.
But at the same time, once you understand your own insignificance, you won't feel arrogant and won't be easily satisfied.
"Now can someone tell me why it is hottest at noon, but becomes colder at night?"
Han Cheng looked at everyone, paused for a moment, and continued to ask questions, allowing the people in the tribe to think for themselves.
"It's because there is sunlight at noon, but there is no sunlight at night."
This question was relatively simple. As soon as Han Cheng finished speaking, many people raised their hands.
Han Cheng asked one of them to stand up and answer.
"Very good! That's because the sun shines at noon but not at night. It's just like when we sit around a fire, the side that is warmed by the fire is warm, and the side that is not warmed will be cold."
Han Cheng nodded approvingly, then looked at the happy man and continued, "Then can you tell me why it is hot at noon, but cooler in the morning and evening? The morning and evening are the same as noon, because the sun is shining."
After this question was asked, the person answering the question was immediately stumped.
Yes, the sun shines on us in the morning and evening, so why is it the hottest at noon?
Not only her, but many people sitting in the big brick and tile house were stumped by the question Han Cheng asked and were trying hard to think about it.
"Son of God, I know!"
After a moment, Shitou raised his hand and looked at Han Cheng with some excitement.
Han Cheng asked the man to sit down and let Shitou speak.
"It's because we are far from the sun in the morning and evening, and close to it at noon.
It's just like sitting by a fire. If you are close to the fire, it will be hot. If you are far away, it won't be as hot. ”
Shitou stood up and said this, and at the same time imitated Han Cheng and used the well-known example of roasting fire.
Han Cheng smiled again. Shi Tou was really talented in these areas and had quite the charm he had in his old age.
"Then, how do you know that we are closer to the sun at noon and farther away from the sun in the morning and evening?"
Someone asked the stone a question.
Seeing this, Han Cheng did not say anything, but smiled at the person who asked the question and Shi Tou, wanting to see how Shi Tou would answer.
"This is very simple. Not long ago, the Son of God used a rope and fruit to demonstrate to us that the distance between the sun and the edge of the earth is farther than the distance to the center. Using the same method, we can get these results."
Faced with such a question, Shitou didn't hesitate at all and just spoke out the solution.
When Han Cheng heard this, a smile appeared on his face again.
Shi Tou is a really smart guy. He actually thought of the experiment he did not long ago.
At that time, I wanted to explain to them why it gets hotter the further south you go, but I didn't expect that Shi Tou would apply it here.
The same method can indeed be used to explain and verify problems in this area.
After hearing what Shi Tou said, many people remembered the experiment that the Son of God had done in the rabbit circle before, and then connected it with the present, and found that it was indeed the case.
Seeing everyone's reactions, Shitou felt more at ease and felt a sense of joy as a top student bullying a poor student.
"Then why does the sun look so big in the morning and evening, but so small at noon? Isn't it that the closer it is, the bigger it looks, and the farther it is, the smaller it looks?"
Another person spoke up, confusion in his voice.
As soon as these words were spoken, those who had just thought that Shi Tou was right became confused.
The closer you are to the fire, the warmer it is. At noon, you are close to the sun, so it is hot. There is nothing wrong with this.
But because the distance is close, the sun should appear to be the biggest, but the reality is that the sun appears to be the smallest at noon.
Once these two things were connected together, it instantly became a headache. Even Shi Tou, who was full of confidence just now, was overwhelmed by this problem and his mind was full of confusion.
He felt that the sun was closer at noon, but he couldn't understand why the sun looked much smaller at noon than in the morning and evening.
For a moment, everyone in the Qingque tiled house was confused by this tricky question, and their minds were full of confusion.
Han Cheng didn't find it strange at all that everyone in the tribe was confused by this question, because it was an eternal problem.
When Confucius traveled east, he saw two children arguing about the sun. The sage Confucius was speechless by this tricky question and was even laughed at by the two children.
It is normal for people from my tribe to be confused when faced with this eternal problem.
When he was in school, he was also confused when he learned this text, and felt that what the two kids said made sense.
He was puzzled by this question until he entered high school and studied geography, when he finally figured it out.
"Son of God, are we closer to the sun in the morning or at noon?"
Shi Tou, who was confused and bewildered, finally couldn't help but asked Han Cheng.
Originally, he had full confidence in the results he had obtained, but now, he was shaken.
The others also looked at Han Cheng, wanting to get an accurate answer from their Son of God and solve this problem that was giving them a headache.
"Of course it is closer to the sun at noon and farther away from the sun in the morning and evening."
This question could stump Confucius, who was seriously unskilled in certain subjects, but it could not stump Han Cheng, a liberal arts student with good grades in geography.
After hearing Shitou's question, he gave an accurate answer very directly without any vague words.
In the past, after getting the accurate answer, many people in the tribe would not continue to ask questions, but this time it was different. They all wanted to know why it was like this.
Why does the sun look so big in the morning, but is actually far from the ground...
What you see is not necessarily the truth. In many cases, your eyes can deceive you and give you an illusion.
"This is because in the morning, the sun shines in at an angle and is refracted particularly clearly by the atmosphere surrounding the earth, magnifying the sun.
But at noon, the sun shines more directly, which does not magnify the sun, but shows its true appearance, so at noon, the sun looks smaller. "
Of course, no one in the tribe could understand what was said. Even Shi Tou, the most talented one, was confused.
Han Cheng thought about it, and asked someone to get a piece of ice from the basin outside. He carefully made it into a convex lens, and then placed it in front of one of his eyes.
So, everyone in the tribe was surprised to find that the Son of God's eye was much larger than the other eye.
When Han Cheng removed the ice from his eyes, the eye immediately returned to its normal size.
"In the morning, the atmosphere acts like an ice cube, magnifying the sun, but at noon when the sun is directly overhead, the atmosphere has no magnifying effect."
Han Cheng said as he changed a flat piece of ice and placed it in front of one of his eyes. His eye looked about the same size as before.
This magical scene made everyone marvel at it, but at the same time, through this analogy experiment, many people in the tribe understood what was going on.
After Han Cheng saw that many people understood, he gave the ice cubes in his hand to the people sitting in the front and asked them to play with them.
"Son of God, the earth we live on is a big sphere, and it keeps spinning. Why wasn't that person thrown out?"
When everyone was curious about the ability of ice to magnify things, the witch, who had been silent, finally asked a question.
He had been struggling with this question for quite some time and had not figured out the answer. Seeing that no one was asking questions and the Son of God did not continue to explain, he thought for a while and then stood up and spoke it out.
After the witch's voice was rang out, the large blue brick and tile house suddenly became much quieter. After everyone understood the question the witch asked, the house became even quieter.
If Wu hadn't brought it up, they wouldn't have realized this problem.
Now that Wu had said this, they followed Wu's train of thought and immediately fell into the same confusion and doubt as Wu.
Seeing this, Han Cheng sniffed and thought, luckily he was a time traveler, otherwise he would have been stumped by your questions.
He looked at the crowd, cleared his throat, and prepared to stand on the shoulders of giants to grab Mr. Newton's apple.
"This is because the earth we live on has a kind of attraction that can suck us all in, not just us, but everything on the earth will be attracted.
It is precisely because of this invisible and intangible attraction that we will not be thrown away by the rotation of the earth. "
Just as Han Cheng thought, after he threw out the gravity, everyone in the tribe stopped talking, with surprise, confusion, or thinking in their eyes...
"But, Son of God, if birds can fly in the sky, I can also jump."
After this atmosphere lasted for a while, someone finally couldn't help but speak.
“But birds can’t fly in the sky all the time. They always fall to the ground or onto a tree. When you jump up, you can only leave the ground for a short while before falling back to the ground.
If the earth has no attraction, then after you jump up, shouldn't you not fall down, but float in the air, or go up to the sky?"
Han Cheng asked back with a smile.
After this question was asked, everyone was stunned.
Yes, why do all things fall to the ground? Even the farthest flying bird will fall to the ground when it is tired.
The leaves blown into the sky by the wind and the stones thrown by others will eventually fall to the ground.
If there wasn't the universal gravitation that the Son of God talked about, these things would have flown to other places, right?
If there wasn't the universal gravitation that the Son of God talked about, which we have become accustomed to, we wouldn't be able to live on this rotating big sphere, right?
Han Cheng looked at the reactions of the crowd and a smile appeared on his face. It seemed that he was quite successful in snatching Mr. Newton's apple this time.
Come to think of it, many things are most difficult when they are first invented or discovered. But once someone breaks through this layer of window paper and makes it out, later generations will find it not difficult at all.
For example, today Han Cheng was telling everyone in the tribe about natural knowledge including gravity. When he combined it with the actual situation in reality, it was not difficult to understand.
If it were difficult, this knowledge would not be taught in high schools and popularized to the public.
As a mediocre being, it was impossible for him to understand and remember all of this.
Today’s story ends here. When everyone came out of the big brick and tile house, they looked at the familiar scene outside and felt that it was a little different.
It seems that the whole person understands a lot of things all of a sudden, and has a different view and understanding of the world.
As night fell, the Qingque tribe, like the rest of the place, was shrouded in darkness.
Lying on the warm kang, Shitou opened a corner of the window beside him.
Through this corner gap, he could see two bright stars in the night sky.
At this moment, the stone's eyes were as bright as the two stars in the night sky.
Thinking back to what the Son of God said today, Shi Tou's heart was filled with emotions.
Before this, he had never thought that there were so many things hidden behind these things that he and others had long been accustomed to.
Many seemingly ordinary things have their reasons.
Today, as the Son of God told his story, he discovered a different world, as if a door in his mind had been opened.
Perhaps, when I know enough about this world, I will be able to fly to the sky!
He didn't know how long he had been lying here. Shitou put down the corner of the animal skin curtain and lay on the bed, thinking about these things and couldn't help clenching his fists.
Han Cheng, lying on the kang, was also not at peace as he thought about what happened today.
As a time traveler, the most valuable thing is actually what you know, the knowledge that is far beyond this era.
Especially someone like him who traveled directly to prehistoric times.
Traveling back to prehistoric times is inconvenient in many ways, but from another perspective, it is not without some advantages.
At least you can build the tribe according to your own ideas without anyone telling you what to do.
There will not be people who consider themselves orthodox, who will come out and criticize you with righteous words, saying that you are a heretic, that you only have strange tricks and do not understand the ways of the ancient kings.
Here, when you want to do something, you can just do it directly without having to haggle with all kinds of people, which would ultimately destroy what you want to do, or even cause it to fail in your womb.
As a latecomer, Han Cheng naturally knew how important the knowledge he possessed was to his own tribe, or to the entire era.
So he wanted to pass these things on as much as possible.
With his furs, the tribe will be able to avoid many detours and make a very good start.
As the tribe developed, many outstanding talents emerged on the shoulders of him.
Among all the knowledge he learned, knowledge of natural science can be said to be of vital importance.
The statement that science is the primary driving force for development is absolutely correct.
Natural science knowledge, or basic scientific theories, is a vital link in the entire scientific development.
After the emergence of gravity, various new things emerged, which greatly promoted the development of science.
When it reached a bottleneck and was constrained, the special theory of relativity and the general theory of similarity came into being. On its basis, there was another round of explosive growth, like mushrooms after rain.
Perhaps in the future, I should tell more people in the tribe about this knowledge, and slowly share what I know with those who have talent in this area.
As for some things that are too profound and you only have a vague understanding of, you can record them down first. Maybe later, when the tribe has developed to that stage, some descendants in the future will see these and suddenly realize the mystery, thus promoting the development of the entire tribe.
Han Cheng was lying on the kang thinking about this, and the more he thought about it, the more he felt that his idea was very reliable.
The barrel of a gun may rot, purses may change owners, but the only thing that will not change is the truth, especially the truth about science.
After all, matter is not transferred by matter.
Of course, Han Cheng also knew that according to the current situation of the tribe, it was unrealistic to develop all of these quickly. To realize these ideas of his would take even longer than cultivating rapeseed into cabbage.
But as long as you do this, there will always be hope.
A seed planted today may grow into a towering tree and bear abundant fruit.
Who can predict what will happen in the future?
Lying on the kang, his thoughts were flying around randomly. After a long, long time, Han Cheng finally fell asleep completely.
In the following days, the weather was sometimes sunny and sometimes cloudy, and on two days there were even some fine snowflakes falling.
On two days, the temperature rose, but not much, and it did not last for a few days before dropping again.
Those leaves that were not quite yellow before, quickly turned yellow under such a climate. They fluttered down in the whistling cold wind, and when people stepped on them, they made crisp, burning sounds.
The autumn of the eleventh year of Qingque is truly gone forever, having been forcefully squeezed away by the strong winter.
In such weather, many activities of the Qingque tribe did not stop.
For example, burning charcoal, transporting manure to the land around the tribe, and continuing to plow the soil before the heavy snow falls.
Han Cheng took the time to tell more about geography to those in the tribe who were interested.
The approach is still to ask questions and then answer them.
For example, why are there four seasons, spring, summer, autumn and winter? After raising this question, he began to slowly explain to everyone about the Earth's revolution, perihelion, aphelion, and the Tropic of Cancer.
Many people find it difficult to understand these things, but Han Cheng has plenty of time and patience, so he finds ways to explain them over and over again, bit by bit, over and over again.
At the beginning, the people in the tribe were learning the new Mandarin and Chinese characters from scratch, but they could not withstand Han Cheng's repeated attacks. One by one, they were trained by Han Cheng to speak Mandarin, write and recognize some Chinese characters.
Now that this spirit has been brought out again, many people have gradually understood what is going on.
Even some people who didn't understand, under Han Cheng's repeated attacks, remembered what he said firmly in their hearts.
After you have memorized these things in your heart, in the years to come, sometimes you will suddenly understand some of them without realizing it.
As for how to apply knowledge flexibly, according to Han Cheng's own experience, one must first work hard, with a spirit similar to rote memorization, to absorb these things, and then apply them flexibly on the basis of remembering them firmly.
Otherwise, if you don't even know some basic fundamentals, how can you apply what you have learned?
Of course, this only applies to people with ordinary qualifications. For people like Shi Tou, who understand things very quickly and can sometimes draw inferences from one example to another, such a thing simply does not exist.
However, Han Cheng could only sniffle at those people he met in school in his later lives who were obviously ordinary people in terms of qualifications, but were very particular about applying what they had learned, and who looked down on those who only knew how to memorize things by rote, and who later became a mess.
The bigger the turtle, the bigger the nest it builds. Stupid people use stupid methods. Han Cheng thinks this makes sense.
It is important for people to know themselves and not underestimate themselves, but they also cannot be arrogant. Knowing oneself and having the courage to admit it is very important sometimes. After all, there are too few geniuses in this world, and most of them are just people with similar qualifications.
Well, this is a bowl of poisonous chicken soup from primitive times...
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