"And what happened to you?"

Xiaojing didn't seem to believe it yet, it seemed that in her heart, if something didn't happen to her sister, she shouldn't have spoken out? But Levi clearly remembered that when the four of them got together, Xiao Si was also quite active. Today, it is estimated that it is because of the addition of the three students of Fit, which makes Xiao Si a little embarrassed, so he always seems to be silent. In fact, this girl is not the kind of three who have nothing like Yuki Nagato and Eve, except for being a little bit natural.

"I just wanted to ask, why is it possible to make ice cream with salt? Doesn't salt melt snow and ice, and doesn't it make it harder to turn milk and cream into ice cream with salt?"

There are two fewer of the three juniors, and Xiao Si's pressure seems to have been reduced. Or maybe she's getting used to it over time. In fact, because of this, the Hiiragi sisters and Takara Miyuki had some dealings with the girls who transferred to the second middle school of the Levi family before. It's just that the girls have been in school for a short time, and everyone hasn't known each other for a long time. I believe that after a while at the beginning of the next semester, the friends on this side will gradually get acquainted with the girls of the Levy family.

"I see, what Xiao Si said is actually true, if you put salt directly into the iron bucket, it may be difficult to make ice cream. ”

Mei Xing is worthy of being a natural teacher, and as soon as he heard Xiao Si's question, Levi could notice that this girl, who was usually always light, seemed to be even happier.

"In fact, the main reason why salt melts snow and ice is that when salt is fused with snow water, the temperature required for solidification becomes lower. ”

Of course, Xiao Si couldn't understand this simple explanation, and Levi's confused expression made him want to laugh a little.

"The freezing point of water in the normal state is zero degrees Celsius, which means that water will freeze when the temperature is below zero degrees Celsius. The freezing point of salt water, that is, sodium chloride solution, is lower than zero, generally at minus 10 degrees Celsius. There are chloride salt snow melting agents with a lower freezing point, such as calcium chloride, which has a freezing point of minus 20 degrees, and acetate must be as low as minus 30 degrees before it condenses into ice. ”

I still don't understand what salt can make into ice cream. But the knowledge that Takara Miyuki said did understand it. After all, she is also a student who was admitted to a good high school with her own ability. If she can't even understand such simple scientific knowledge, it really worries about how she usually completes her homework every day.

"And putting salt on ice or snow can help make ice cream. In fact, it takes advantage of the lower freezing point of chloride deicing agents, which is equivalent to reducing the temperature of ice and snow. The lower the temperature, the faster the ingredients in the bucket will solidify. For example, some of the refrigerators at home can reach minus 20 degrees Celsius, which is obviously much lower than the temperature that our current ski resort can reach. In other words, it is certainly faster to freeze water into ice in the refrigerator than it is to leave it in the open on this ski resort. And it's the same with ice cream. ”

"It turns out that the function of salt is to lower the temperature!"

Miyuki spoke clearly and clearly, and Xiao Si understood it at once. Looking at her frequent nodding appearance, people are curious about her sister Xiaojing's ability to teach others. Everyone often hears Xiaojing complain, saying that when Xiaosi asks herself about what she doesn't understand in her homework at home, it took a long time for her to reluctantly teach her. However, now observing the process of Miyuki explaining to her, it makes people feel that Xiao Si's comprehension ability does not seem to be as bad as Xiao Jing complains.

So in the end, Xiao Si is more serious, just like Naiye, she understands the content of these science subjects, but she always can't understand the liberal arts, so let Xiao Jing say the kind of complaint that doesn't match everyone's current perception. Or is it actually Xiaojing himself who is not very good at teaching others what he knows, so that he has wasted his tongue for a long time, but he still can't let Xiaoji learn?

Take Levy, who is a teacher, to give a fair judgment. His personal tendency is that Xiaojing's lack of 'teaching ability' is the main reason. Although Levy himself is a liberal arts teacher, he must admit that from the large sample he has observed in his long teaching career, at least at this stage of high school, children who are generally excellent in science can often achieve quite good results in liberal arts courses as long as they do not resist it.

Since Xiao Si can even grasp the knowledge of science relatively well, then normally speaking, at least at the level of middle school students, most of the liberal arts knowledge that is still at the level of proficient memory should not be so difficult to learn, right?

Of course, Xiao Si's brain turns slower than the average level of students in No. 2 Middle School, which is probably certain, after all, everyone sits in the same classroom every day and listens to the same teacher teach the same class. In the end, the test results were different, and if you want to insist that there is no difference in ability between them, then I am afraid that even the students of Lotte themselves know that the teacher is comforting them.

On the other hand, Xiaojing is probably the type that can learn well by himself, but he can't convey what he knows to others well. Levi felt that with Xiaojing's personality analysis, this kind of thing was not surprising. After all, Xiaojing is a typical tsundere girl, and the existence of tsundere is often because they are not good at expressing themselves, or they dare not express themselves, so they always make simple and direct situations complicated or even completely reversed?

"Then why do you have to turn the bucket around? It feels so tiring to spin around with such a big bucket......

"Yes, yes, yes, I first heard Miyuki say that you have to turn the bucket all the way to make ice cream, so I came up with a way to roll the bucket straight down the hillside. With so much milk and cream in such a big bucket, if it weren't for the help of machines and the like, we girls would have to keep spinning until we made ice cream, and maybe we would all be too tired to eat!"

Izumi, who hadn't opened his mouth for a while, finally found a chance to speak. Although she rushed to say this sentence was very suspicious of exculpating herself, she did have her own reasons.