I am a little boy who loves to explore new things. I heard that after cutting an earthworm into two parts, it will not only die, but also become two live earthworms! To prove this, I did an interesting little experiment.

The students said that earthworms could be seen everywhere after the rain. One day after taking a bath, I really found an earthworm beside the flower bed without any effort.

When I got home on Friday, I took out my art knife, put the earthworm on a piece of paper and thought confidently: I will definitely complete the experiment successfully.

The experiment began. I carefully cut the earthworm in half. Take a closer look, huh? How can earthworms be as still as dead? I was extremely depressed: did my experiment fail? Just when I was depressed, I suddenly remembered what my mother had said to me: "Don't give up when you encounter difficulties, my mother believes you can do it!" " "So, I cheer up and continue to do experiments. I took "100,000 Why Biology Articles" and began to look up some information about earthworms. I rummaged around and found the answer. Oh! It turns out that after the earthworm is cut off, the muscles next to the wound will tighten immediately, just like the door that was still open will close immediately. It's amazing! Earthworms are actually very regenerative, so that's it! After two or three days, the divided earthworm can become two complete earthworms! Seeing this, I seem to see the dawn of victory and have confidence again!

Two days later, when I went to see my earthworms again, I really found two small earthworms crawling around in the box! I told my mother about it, and she smiled and said, "Haha, our son will learn to do experiments by himself!" " "

This is a little experiment I have done before. Isn't it interesting?

Simulated rain

I know that rain is caused by dry weather and upward floating steam.

In today's science class, the teacher asked us to go home and do a small experiment "making rain", and explained in detail how to make rain. Of course, the first thing to do when you get home is to do experiments. First, I took some ice out of the refrigerator, put it in a glass, put a glass cover on the glass mouth, and put the glass on the balcony. But I waited for a long time, but it still didn't rain. I'm really annoyed. I picked up the receiver and called my classmate Huang Qiuyang to ask him if the experiment was successful. His answer was unsuccessful. I called several other students again. Did the experiment succeed? Similarly, they did not succeed. I didn't believe it, so I buried my head and read a science book. As soon as I read this book, I knew why the experiment was unsuccessful. Because the sunshine at night is too weak! Water vapor can't be increased. What shall we do? I thought about it, and soon found a way to increase the steam, and asked my mother to help me heat it on the gas stove. In this way, there is fog in the glass. Many things happen. The fog quickly turned into small water droplets and gathered under the glass cover. Soon, the rain began to tick. I shouted happily, "I succeeded, I succeeded!" " "Mom is also very happy to see it, and praises me for thinking.

After this incident, I was greatly inspired: to do a good job, don't be discouraged when encountering difficulties, study more, think more ways, dare to practice, and will certainly succeed.

I feel heavy because I failed to beat Weng.

Students, have you heard the story of Columbus laying eggs vertically? Columbus broke the egg and stood up. In fact, you can stand up without falling, but it takes about five minutes, which is really too much trouble. Because when the center of gravity is directly above the triangle, the egg can stand upright. When the center of gravity is not above the triangle, the egg falls. The so-called center of gravity refers to the point where the resultant force of gravity acts on all parts of the object. From this we can think of an object, which can not only stand up, but also cannot be pushed down. Needless to say, if you are smart, you will definitely think this is a tumbler. Interesting tumbler, no matter how hard you push, you won't fall down. Even if you put it sideways, it will stand in front of you. Why doesn't the tumbler fall?

Oh! On the one hand, because the top is light and the bottom is heavy, there is a heavy iron block, so the center of gravity is very low; On the other hand, the lower part of the tumbler is made into a smooth sphere. When it leans to one side, its center of gravity rises and it is in an unstable state. Under the action of gravity, it moves to a stable and balanced position. Due to the inertia of the sky, it will swing back and forth several times and finally stay in its original position.

Ah! It turns out that science is everywhere around us. In order to benefit mankind, we must do more scientific experiments, learn more scientific knowledge and study hard.

High air pressure

After reading the composition "An Experimental Class", I doubt that the atmospheric pressure outside the sphere can really press the two hemispheres together.

I redone atmospheric pressure today. Want to know the result? Take your time.

After school, I asked several students to do atmospheric pressure experiments. First, I took out two iron hemispheres, which were the same size and hollow, and a thick rope was tied to the top of each hemisphere. At first, I slowly pumped air out of the air hole and quickly plugged the air hole with a rubber plug. Finally, tie the rope at the top of the iron ball to the leg of the table. When it was ready, all my friends rushed to do it. I think they are so messy, so I will sort them out one by one and come in order. When I gave the order, the first one pulled hard to the side, and the iron balls seemed to be cast together and could not turn. We all cheered for him, but in the end we didn't succeed. The second man came up. He pulled hard for several minutes, but he didn't pull it down. At this time, I flew into a rage, biting with my teeth, hitting with a pencil box and hitting with a stone, but I didn't break in half for a while. In this way, one by one failed. There were only a few people left, and they were silent, and none of them dared to pull. They thought that such an iron ball had not been pulled down. I think the method in the book may be really useful. I touched the rope timidly, and my friends gave me courage. I pulled off the rubber plug, and then I pulled off the iron ball with little effort.

Afterwards, everyone asked me, "Why can I unplug it?" I said, "This secret must not be revealed."

Why don't soybeans germinate

Last week, I did a novel experiment-incubating bean sprouts.

Grandma gave me some soybean seeds, but I don't think they are enough. I had to take them out of the plastic bag tied tightly by my mother. My mother said the beans in the bag can't hatch bean sprouts. I don't believe it, so I have to do the experiment. So I separated the two kinds of soybeans and hatched them.

According to the introduction in the book and the teacher's guidance, I put these two kinds of soaked soybeans between two layers of wet straw and drench them with water every morning, noon and evening. I think, how can the same bean sprouts not grow in the same way?

The next day, I gently opened the straw on the bean sprouts. The soybean seeds in my grandmother's house have expanded to twice the original size, and many beans have short and thick buds on their waists. But the soybeans planted by my mother only grow fat and don't sprout. What's going on here?

On the fourth day, grandma's bean sprouts grew much taller, but mom's soybeans changed color, from light yellow to dark yellow, and some of them became light black. It seems that I am really going to be "unlucky" by my mother.

On the fifth and sixth day, time passed day by day, and the bean sprouts hatched with grandma's soybeans grew taller and taller, longer and more tender, with jade pillars and golden tops, very beautiful! But mom's soybeans are rotten. Only then did I believe what my mother said was true, but why? I have to ask my mother for advice. My mother smiled and said, "Although the beans are dry, they still need to breathe. Your grandmother's beans are hanging under the eaves, and the air is fresh. Of course, breathing is not a problem. The soybean in that plastic bag is dead because the mouth of the bag is tightly tied, there is no ventilation and it can't breathe. " "Oh, so that's it!" I said thoughtfully.

Unexpectedly, dried soybeans will suffocate. Life is full of science!

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Pinch an egg

After reading my composition topic, my classmates will definitely say, "How can you pinch eggs?" Everyone knows that the thin shell of an egg breaks at the touch. "In fact, this is scientific! Look down if you don't believe me!

That's Wonderful World, which my father took me to Cai Cheng Bookstore. I was busy watching it as soon as I got home. Suddenly I saw an interesting story, which said, "A Hercules can break bricks. But someone told him to break the egg, but Hercules couldn't break it. I looked at it with a grain of salt and decided to find a chance to try.

The opportunity has finally come. One day my father bought a bag of eggs, so I asked my mother for an egg to do a small experiment. After my pleading, my mother finally agreed.

I brought a bowl first, and in order to prevent it from being crushed when I pinched it, those egg yolks spilled all over the floor. Then I put the egg in my hand and caught it. At this point, my heart was pounding and my hands were all sweaty. The scene of broken eggs seems to appear in front of my eyes. In order to find out whether the egg can be crushed, I closed my eyes and squeezed my hand hard, and then waited for the sound of the egg breaking. But to my surprise, when I opened my eyes, the egg didn't break, but I still had some doubts and was ready to do the experiment again.

I put the egg in my hand again (this time I used two hands), and then I gritted my teeth, opened my eyes wide and tried my best to pinch the egg. But despite my efforts, the egg was safe and sound. This really annoyed me and surprised me, so I had to ask my father.

After listening to my words, my father smiled and said, "This is actually a scientific principle. Although the egg is thin, it is oval. When you pinch it, it distributes all your strength evenly in all parts of the egg, so it can bear a lot of strength. Some thin-shell buildings are built using this principle! " After listening to my father's words, I really believed the story in the book.

Ah, what a wonderful world.

Remember an interesting little experiment?

I have been curious since I was a child, especially about flying. I want to glide in the sky most, so I like flying very much.

It was noon, and I was fiddling with the golden cloth in front of me. Playing, it suddenly occurred to me: why not use this cloth for parachute experiment? Do it. I immediately found four ropes of the same length and tied them to the four corners of the cloth. After I tied them, I tried to pull four strings to make sure there was no problem, so I found a small toy and tied all four strings to the toy. Excited, I climbed into a higher cabinet, stood up, grabbed my parachute and paratroopers, waved my hand, and I thought this parachute would definitely fall down, but something unexpected happened. The paratroopers actually sagged straight, and finally failed to land safely and died heroically. I paused: how could it be that the experiment was wrong and I jumped out of the cupboard without thinking, grabbed the paratroopers, looked around, and there was nothing wrong? I finally came to the conclusion that toys are too heavy. So, I immediately changed to a lighter toy, tied a rope to it, and did another experiment. As a result, the paratroopers ended tragically. I wonder if there are any more questions. At this moment, a breeze blew, and I had an idea: there must be insufficient wind. So I took the paratroopers to the top floor again. It's just a gust of wind, but it's too late. As soon as the parachute opened, the paratroopers landed leisurely on the ground and landed safely. I cheered, rushed downstairs, picked up the paratroopers and shouted excitedly, "I made it!" Success! "

Although this is only a small experiment done a long time ago, it is deeply imprinted in my mind. Whenever I encounter difficulties, the parachute and paratroopers always appear in front of my eyes, prompting me to overcome all kinds of difficulties. In life, difficulties are like spring. You are strong, he is weak. If you are weak, he is strong. Therefore, as long as you can't bow your head in the face of difficulties, no matter how strong the difficulties are, you will only be defeated!

Remember an interesting little experiment?

This Sunday afternoon, I was bored and could only sit in a chair in a daze. Dad seemed to read my mind and said, "How about Dad doing an experiment with you?" Hearing this, I jumped up excitedly: "What are you waiting for? Go! "

So, my father pulled me into the kitchen, turned on the tap and said to me, "Look at this water, it's flowing downwards. Can you make it turn? " I thought: it is impossible to make it turn a corner, and dad can't do it. I said, "No. Then can you? " Dad smiled and said, "Look!" He took the spoon and rubbed it with woolen cloth several times to make it charged. Dad put it near thin water, yeah! The water turned around and approached the spoon. What's going on here? Does dad have magic?

My father saw my doubts and said, "Tell you the truth: spoons are attractive to uncharged water." . Once the spoon is exposed to current, this little experiment will not succeed. Water is a conductor, which can immediately conduct electricity out of the spoon! Even water vapor floating in the air can be charged. You got it? "I nodded puzzled." Come and have a try! "He gave me a spoon. I just did it according to my dad's method, yeah! The current really turned! I became a magician, too.

This experiment is really interesting.

Remember an interesting little experiment?

I am a little boy who loves to explore new things. I heard that after cutting an earthworm into two parts, it will not only die, but also become two live earthworms! To prove this, I did an interesting little experiment.

The students said that earthworms could be seen everywhere after the rain. One day after taking a bath, I really found an earthworm beside the flower bed without any effort.

When I got home on Friday, I took out my art knife, put the earthworm on a piece of paper and thought confidently: I will definitely complete the experiment successfully.

The experiment began. I carefully cut the earthworm in half. Take a closer look, huh? How can earthworms be as still as dead? I was extremely depressed: did my experiment fail? Just when I was depressed, I suddenly remembered what my mother had said to me: "Don't give up when you encounter difficulties, my mother believes you can do it!" " "So, I cheer up and continue to do experiments. I took "100,000 Why Biology Articles" and began to look up some information about earthworms. I rummaged around and found the answer. Oh! It turns out that after the earthworm is cut off, the muscles next to the wound will tighten immediately, just like the door that was still open will close immediately. It's amazing! Earthworms are actually very regenerative, so that's it! After two or three days, the divided earthworm can become two complete earthworms! Seeing this, I seem to see the dawn of victory and have confidence again!

Two days later, when I went to see my earthworms again, I really found two small earthworms crawling around in the box! I told my mother about it, and she smiled and said, "Haha, our son will learn to do experiments by himself!" " "

This is a little experiment I have done before. Isn't it interesting?