Science at hand

We always think that science is a distant word. In the impression, science is like an obscure book. No one can understand it except scientists. Moreover, the process of exploring science is always so hard.

The Curies and the couple worked hard to get pure radium. In a broken shed, I worked four years around the clock. I used my iron rod to stir the bitumen uranium slag boiling in the pot. The eyes and throat were endured by the smoke from the pot. After repeated refining, I got a tenth of a gram from the bitumen of bituminous uranium slag. radium.

However, this does not mean that we cannot understand science and explore science. There are also many interesting scientific knowledge around us. We have also done some experiments and some knowledge. Below, I explored through the discovery of my own, watching about TV shows and finding relevant knowledge from the Internet.

Entering the middle of the country, the pressure is naturally greater than that of the small country. The amount of work has increased, and the time to go to school has also advanced a lot. Some people are a little sleepy for these two reasons, occasionally yawning during the day. Recently, I found that the noise around me is getting smaller and lighter when I yawn. This is the case several times. I was very surprised. I found the relevant information on the Internet and realized that it was because the eustachian tube in the throat was open when yawning, causing a large amount of airflow to rush into the middle ear, impacting the tympanic membrane, affecting its vibration, and making the tympanic membrane abnormal. Receiving outside sounds, so when you yawn, you will feel that the outside world is getting smaller.

It turns out that there is so much knowledge in yawning! Then, I was worried about another small problem: Sometimes, when people yawn, there will be tears coming out. Why is this? Although I think this is a matter of course, I don't know the truth.

I asked the computer for help. The computer told me that we usually secrete a small amount of tears, because there are very few, so we don't feel it. When we blink, tears are sucked into the nasolacrimal duct, and then tears are continuously drained. When yawning, the pressure in the mouth and nose increases, blocking the tears excreted by the nasolacrimal duct. Tears can't flow, and more and more tears are accumulated in the eyes, and they flow out.

After understanding this knowledge, I suddenly thought of the technology show that I happened to see a few years ago. I just introduced a question about yawning - will yawning be contagious?

Two groups of experiments were broadcast on the TV. The first group of experiments was a person yawning in the crowd. After a while, the people around him yawned. The second group of experiments was that some people sat in front of the computer and watched the baby yawn. Pictures, after a while, they also began to yawn.

Moreover, I found that if I repeat the action of opening my mouth and inhaling at the same time, I will yawn. I have tried it in my spare time and it is more reliable.

On this point, I also have an online query. There is a saying that this is a spiritual suggestion. When yawning, the brain realizes a reaction that needs to supplement oxygen. When others yawn, they will feel that they need to supplement oxygen, just like watching others eat and they will feel hungry. .

This series of problems has been solved, and I have gained a lot of knowledge. An inadvertent yawn can cause so many problems. If you pay attention, everyone can find the science lurking around.

The third day of the Fan Bridge Campus of Yuhai Experimental Middle School, Ruian City, Wenzhou, Zhejiang: Lin Yiyun