"...But the teacher can give you a way to prove it. On the planet we live in, in addition to the earth, there is also the sea. Sail on the sea by boat, sailing from the land where the Ming Dynasty is located to the east, and sailing all the way, and eventually returning from the west of the Ming Dynasty."

Yong'an County where Qingshan Village is located is only one Haifeng County away from the sea, but even the adults in Qingshan Village have never been to the sea, let alone the students of Fangnan. Fortunately, Fangnan talked about the terms sea, river, boat and other terms last year. Now Fangnan talks about these contents, there is no need to explain it to the students again.

Under the current conditions, Fang Nan cannot prove like the students that they live on a planet, so Fang Nan just came to a conclusion, and it doesn’t matter whether the students believe it or not.

Taking Fang Nan's teachings to the students over the past year, the students are very convinced of Fang Nan. Although they are not convinced of "the earth is a ball", most students are trying to accept this conclusion, and some students plan to try to verify Teacher Fang Nan's conclusion if possible in the future.

After Fang Nan said the conclusion that "the earth is a ball", he continued to teach the students, talking about the relationship between the sun, the earth and the moon.

"From our perspective, the sun and the moon seem to be very small. In fact, both are very large compared to us humans. Compared with the earth where we live, the moon is smaller than the earth, and the sun is much larger than the earth. Why do we see the sun and the moon are very small? The reason is very simple. The moon is far away from us and the sun is farther away from us."

"To give a very simple example, when we look into the mountains in Qingshanzhai, we all know that the mountains are very large, but in our eyes, the mountains are relatively small, and you can fully see them at a glance."

"Every moment, the earth is spinning around the sun, the moon is spinning around the earth, and the earth is also spinning itself. When the sunlight shines on the area where we live on the earth, it is daytime, and in turn it is night. On the earth or this earth, day and night exist together."

"We dare not look directly when we look at the sun. The sun's light is very dazzling, but when we look at the moon, we can look directly when we look at the moon. The moon's light is very soft. In fact, only the sun is shining and heating. The moon will not shine. The moon reflects the sun's light onto the earth, and the light reflected by the moon is very weak. In the daytime, under the sunlight, we can almost see the moon. When we wait at night, there is no sunlight, we can see the moon."

"There are many stars in the sky. Do you know what stars look like? In fact, the stars in the sky are suns. They emit light and come to the earth across very far and far distances, but they are farther away from the earth, so they look smaller."

"We have all said the sun, moon, earth, and stars, and there are only heavens left. There are two explanations for heaven. To put it in a small way, it means that the sky is a certain distance from the earth to the sky. To put it in a big way, the earth, moon, sun and those stars are all in this 'sky'. This 'sky' can be called the 'universe'."

...

Fang Nan said while fiddling with the mud balls on the desk as a model. The students behind him were a little far apart and couldn't see clearly. Fang Nan let the students sit forward and sit together densely, so they could see the movements in Fang Nan's hands and see the changes in the model.

The changes in the day and night are easy to explain, and the changes in the four seasons are a little harder, but in Fang Nan's explanation, students have almost understood it.

Originally, many students still had difficulty accepting "the earth is a ball". Now, after Fang Nan explained this, the reasons for the changes of day and night and the changes of the four seasons were found. Gradually, they began to accept Teacher Fang Nan's statement in their hearts.

There is a little bit of a doubt that the earth is rotating, and people stand on the earth. If one side of the earth is facing down, how can people still stand firm on the earth?

Faced with the students' doubts, Fang Nan said with a smile:

"This question is the main content of the next common sense lesson. Today I will briefly talk about it. I grabbed a mud ball in my right hand, let go of my right hand, and the mud ball fell to the ground. We jumped up on the spot and soon fell to the ground. The fruits on the trees will fall to the ground when they are broken or mature, etc.

These things are a common principle. As long as you understand this principle, you can understand the issue of "people can stand firm on the earth". After school today, they can think carefully. When tomorrow's common sense class, I will first listen to the ideas.

OK, today's common sense class will end here and end."

Zhou Lei: "Stand up."

Swish, more than forty students in the school stood up and watched Fang Nan and Hu Xiaoya leave the school.

The teacher left, and the school suddenly became lively. Three or five students gathered together to discuss the content of the common sense class. The content of the first common sense class really changed their concept of the world.

Originally, the students thought that the earth was flat, the sky was flat, or like a big bowl was upside down, but now in Teacher Fang Nan’s air, the earth was actually a sphere, and genius was truly boundless.

"Do you think the teacher's statement is correct?"

"It must be right, how could the teacher lie to us?"

"Of course the teacher won't lie to us, but the teacher knew whether the matter would be fake, but the teacher said it to us as real."

"The teacher's statement is definitely correct. I will explain the alternation of day and night and the rotation of four seasons clearly. What other statement can explain this clearly."

"Yes, yes, the teacher's statement is very reasonable, I believe the teacher's words."

There are still people among the students who cannot fully believe Fang Nan's words. After all, these are all spoken by Fang Nan, but they cannot make a valid proof. However, more students still believe Fang Nan's words, or simply believe Fang Nan's words, or agree with Fang Nan's words in Fang Nan's explanation and fiddling model.

No matter what, after a common sense class, the students' moods changed a lot, which was exactly what Fang Nan wanted to see.

In the Ming Dynasty, many poor scholars read and read only one purpose. They took the imperial examination and became officials, and "promoted and made money" were deeply rooted in the hearts of the people. They wanted to get rid of the common people's class, become promoted to the ruling class, and then continue to oppress and exploit the common people without doing much interesting things to this country. Of course, this country itself has many problems.
Chapter completed!