The magical power of simple small experimental paper writing essay

1. How to write a composition about a small experiment

A wonderful little experiment

In a nature class, the teacher asked us to do a wonderful little experiment ——Pieces of paper hold water.

In the nature class, the teacher briefly explained the experimental method and then asked us to do the experiment. After the experiments of the previous classmates were completed, it was my turn. I walked to the podium, first turned on the faucet, and carefully filled the cup with water. Then I picked up a piece of paper, put it on the cup, pretended to use my strength to suck milk, and pressed the paper hard. For a moment, then quickly reverse the cup, and guess what? The piece of paper was completely absorbed by the cup, and not a drop of water in the cup came out. This made me puzzled, why was the piece of paper sucked on the cup? Why doesn't the water in the cup flow out? This really makes me, the second monk, scratch my head. I thought: Could it be that I have seen a ghost? Or is the gravity of the atmosphere helping the piece of paper? I asked the nature teacher with questions in my head. ah! It turns out to be so magical! It turns out that the atmospheric pressure is causing trouble. The surface tension of the water in the cup completely closes the paper and the cup. Therefore, the pressure of the water in the cup is less than the pressure of the atmospheric pressure outside the cup. In this way, the atmospheric pressure holds the paper firmly in the cup. Once it is on, the water in the cup will naturally not flow out. "So that's it, how wonderful it is!" I said suddenly. I thought: I must do more experiments like this in the future to enrich my extracurricular knowledge.

It can be said that there are many wonders in the world, and there are many mysteries waiting for us to discover, explore, and study, so that we can learn more and more. 2. An essay written through small experiments

After reading the biography of Marie Curie, I was very interested in scientific experiments, so I pestered my mother to ask her to do it with me. My mother agreed, but made one request - to use your brain to think after completing the experiment. No problem!

Mom brought a cup of water and a piece of white paper. I walked around excitedly and kept asking curious questions! Mom said: "The experiment we did is called 'Magic Paper'. Later, you have to think about why the paper will not fall." Mom first filled the cup with half a cup of water, then pressed the paper against the mouth of the bottle, and then Slowly turn the cup over, still holding the white paper with your hand. Soon, the water droplets soaked into the paper drop by drop, and my mother asked me to release my hand from the white paper. I was a little worried and let go of four fingers first. Huh? The paper is not open! I let go of my whole palm, staring at the paper, my heart in my throat, thinking: Don't drop it, don't drop it, don't drop it... The piece of paper seemed to understand my words and stuck firmly to the cup! But I was still worried and uneasy, not knowing if it would fall down and fail. Ten minutes passed, fifteen minutes passed... until my arms were sore from lifting, and the piece of paper didn't drop! "I succeeded!", I shouted happily. 3. How to write the essay "Great Divine Power"

Great Divine Power

This afternoon, my mother was watching TV while I was eating. She suddenly said on a whim: "Yiyi, Mom Let me do an experiment with you, okay?" As soon as I heard the word "experiment", I became excited and clapped my hands quickly. I jumped up to three feet high!

"First of all, let me tell you the name of the experiment. It's called "The Divine Power of Chopsticks." We have to prepare: a plastic cup, a cup of rice, and a bamboo chopstick. You go find the materials." It seems like the commander The adult's mother spoke. When I heard that there were bamboo chopsticks in the materials, I thought to myself, this experiment will definitely not be possible! I hurried to find the materials, and then my mother said: "This experiment has four steps: 1: Fill the plastic cup with rice; 2: Press the rice in the cup with your hands. Press; 3: Hold the rice with your hand and insert the chopsticks between your fingers; 4: Hold the chopsticks with your hands, and then the cup and the rice will be lifted up together. How about it? It’s amazing, isn’t it? So, in less than five minutes, the experiment was completed. I was surprised that my mouth could fit an extra large "double yolk egg".

My mother looked at me who was completely speechless at this time, patted my little head, and said: "Little fool, this is the principle of air!" "Air?" I questioned. asked. "Yes, it's air. If you don't believe it, think about it: because the air in the cup is squeezed between the rice grains, the air inside the cup is squeezed out. The pressure outside the cup is greater than the pressure inside the cup. That means The chopsticks and the rice grains are closely connected, so the chopsticks can lift the rice grains in the cup together. Do you understand? "Oh, that's it!" I canceled my surprise and replaced it with a look of understanding. An expression of incomprehension.

After passing this test, I understand: there is science everywhere in life! You can only spot them with your carefulness! Even the ordinary chopsticks around us have such a mystery, but what about other things? 4. A very simple science experiment that requires explanation. I am in sixth grade and I want to write an essay.

Thoughts on the magical power of chopsticks: Insert a chopstick into a cup filled with rice, and then lift the chopstick up. , will the chopsticks lift the rice and cup? Materials: One plastic cup, one cup of rice, one bamboo chopsticks Operation: 1. Fill the plastic cup with rice.

2. Press the rice in the cup with your hands. 3. Hold the rice with your hand and insert chopsticks between your fingers.

4. Gently lift the chopsticks with your hands, and the cup and rice will be lifted together. Explanation: Due to the squeezing between the rice grains in the cup, the air in the cup is squeezed out. The pressure outside the cup is greater than the pressure inside the cup, causing the chopsticks and rice grains to be tightly combined, so the chopsticks can turn the rice into pieces. Lift the cup.

Thoughts on the bottle race: Two bottles of equal weight containing sand and water roll down from a height. Who reaches the finish line first? Materials: two bottles of the same size and weight, sand, water, a rectangular wooden board, two thick books Operation: 1. Use a rectangular wooden board and two books to create a slope 2. Pour the water into another bottle and put Pour the sand into the bottle 3. Place the two bottles on the wooden board and let the two bottles roll down at the same starting height 4. The bottle filled with water reaches the end point earlier than the bottle filled with sand. Explanation: The effect of sand on the inner wall of the bottle The friction is much greater than the friction of the water against the inside of the bottle, and there is also friction between the sand, so it slides down more slowly than the bottle filled with water. Creation: Change the substances in the bottles and let them compete! Thinking about electrified newspapers: Without using glue, tape or other adhesives, newspapers can be stuck on the wall without falling off.

Do you know why this is? Materials: 1 pencil; 1 newspaper. Steps: 1. Unfold the newspaper and lay it flat on the wall.

2. After quickly rubbing the side of the pencil on the newspaper a few times, the newspaper will not fall off as if it is stuck to the wall. 3. Lift up a corner of the newspaper and then let go. The lifted corner will be sucked back by the wall.

4. Slowly peel the newspaper off the wall and listen for the sound of static electricity. Instructions: 1. Rub the pencil to electrify the newspaper.

2. The charged newspaper was sucked to the wall. 3. When the air in the house is dry (especially in the winter), if you peel the newspaper off the wall, you will hear a static crackling sound.

Creation: Please give it a try, what other items can be stuck on the wall with static electricity without using adhesives? The separation of pepper and salt. Thinking: Accidentally mix the kitchen seasonings: pepper and salt. Salt and water are mixed together, how to separate them? Materials: pepper, salt, plastic spoon, small plate Operation: 1. Mix salt and pepper together. 2. Stir evenly with chopsticks.

3. Rub the plastic spoon on the clothes and place it on top of the salt and pepper. 4. The pepper adheres to the spoon first.

5. Move the plastic spoon downward slightly. 6. The salt will stick to the spoon.

Explanation: The reason why pepper is electrostatically adsorbed earlier than salt is because its weight is lighter than salt.

Creation: Can you use this method to separate other mixed ingredients? Thinking about charged balloons: Under what circumstances will two balloons attract each other, and under what circumstances will they repel each other? Materials: 2 inflated balloons, 1 string, 1 piece of cardboard Operation: 1. Inflate the two balloons separately and tie a knot around the mouth.

2 Connect the two balloons with a thread. 3. Rub the balloon on your hair (or sweater).

4 Lift the middle part of the string, and the two balloons immediately separate. 5 Place the cardboard between the two balloons, and the electricity on the balloons causes them to be attracted to the cardboard.

Explanation: 1 The electricity on one balloon repels the electricity on the other balloon. 2The electricity on the two balloons causes them to be attracted to the cardboard.

Create: Can you use other small experiments to show that the balloon is charged? Thoughts on cute watermarks: How are the beautiful patterns on rice paper made if they are not drawn? Materials: 1 washbasin, 1-2 sheets of rice paper, 1 chopstick, 1 cotton swab, 1 bottle of ink, water (about half a basin) Operation: 1. Pour half a basin of water into the basin and dip it in ink If you lightly touch the water with your chopsticks, you will see the ink expand into a circle on the water. 2. Take a cotton swab and rub it on your scalp two or three times.

3. Then tap the center of the ink circular pattern to see what happens. 4. Gently cover the calligraphy paper on the water, and then slowly pick it up. What pattern is printed on the paper? Explanation: 1. When the cotton swab is touched, the ink will expand into an irregular circle shape.

2. The small amount of oil applied when the cotton swab is rubbed on the scalp will affect the force of water molecules pulling each other. 3. The watermark will appear in an irregular concentric circle shape.

Create: Try other ways to change the shape of the ink on the water. Thinking about the splitting and recombination of water flow: Why do multiple streams of water turn into one stream of water when you touch it with your hand? Materials: One tin can box, awl, water Operation: 1. Use a nail to drill 5 small holes in the bottom of the empty tin can box (the intervals between the small holes are only about 5 mm).

2. Fill the tank with water. The water will be divided into 5 streams and flow out from the 5 small holes. 3. Use your thumb and index finger to twist the water flows together.

4. After taking your hands away, 5 strands of water will merge into one strand. 5. If you wipe the small hole on the can with your hand, the water will turn into 5 strands again.

Explanation: The surface tension of water causes the water flow to divide and merge. Floating Needle Thoughts: Why do needles float on water? Materials: a bowl of water, needle, needle, liquid detergent Operation: 1. Pour a cup of water into the cup 2. Use a needle and carefully place a needle on the surface of the water 2. Slowly remove the needle , the needle will float on the water. 3. Drop a drop of detergent into the water, and the needle will sink. Explanation: 1. It is the surface tension of the water that supports the needle and prevents it from sinking.

Surface tension is the cohesive bond formed by water molecules. This cohesive connection is due to a certain part of the molecules being attracted together and squeezing each other to form a thin film.

This thin film is called surface tension, and it holds up objects that would otherwise sink. 2. The detergent reduces the surface tension and the needle cannot float.

Note: Needles are dangerous, parents are asked to help operate them.

5. Write an experimental essay with the title of dancing pieces of paper

In college, there was a philosophy class that left a deep impression on me and I still remember it fresh. It was the day after the midterm exam. A classmate in the class was worried and listless in philosophy class because he failed in all subjects. His abnormality attracted the attention of the philosophy professor, who called him up from his seat. Ask him to answer the question. The professor picked up a piece of paper... In college, there was a philosophy class that left a deep impression on me and I still remember it fresh. It was the day after the midterm exam. He failed badly in the exam, so he was worried and listless in the philosophy class. His abnormality attracted the attention of the philosophy professor. The professor called him up from his seat and asked him to answer the question. The professor picked up a piece of paper and threw it to the ground, asking him to Answer: This piece of paper has several fates.

Maybe out of panic or out of mind, the classmate stopped for a moment. After a while, he answered: Throw it on the ground and it becomes a piece of waste paper. , this is its fate. The professor was obviously not satisfied with his answer. The professor stepped on the piece of paper a few more times in front of everyone, and the paper was printed with the professor’s dusty and dirt-covered footprints. Then, the professor Then ask this classmate to answer the fate of this piece of paper.

Now this piece of paper has really become waste paper, what is its use? The classmate said listlessly.

The professor did not speak, picked up the piece of paper, tore it in half and threw it on the ground. Then, he calmly asked the classmate to answer the same question again. We were The professor was confused by his actions and didn’t know what he was going to say. The classmate was also confused. He blushed and replied: Now it’s just a piece of waste paper.

The professor didn’t I picked up the torn paper in half and soon drew a galloping horse on it, and the footprints I just stepped on turned into the wilderness under the horse's hooves. The horse was full of perseverance and determination. and tension, making people full of daydreams. Finally

The professor raised the painting and asked the classmate: Now please answer, what is the fate of this piece of paper?

The classmate's face brightened and he answered simply: You gave hope to a piece of waste paper and made it valuable. A smile appeared on the professor's face. Soon, he took out his lighter again. , ignited the painting, and in the blink of an eye, the paper turned into ashes.

Finally, the professor said: Everyone has seen it, a piece of paper that was inconspicuous at first. If we treat it with a certain attitude, it will become worthless. The more misfortunes we subject the piece of paper to, the less valuable it will be. If we give up hope of its total destruction, it will obviously become worthless at all. It is impossible to have any beauty and value, but if we treat it with a positive attitude and give it some hope and strength, the piece of paper will come back to life. A piece of paper is like this, and so is a person. A piece of paper can It turns into waste paper and throws it on the ground, and is stepped on by us. It can also be used to draw and write, or it can be folded into a paper airplane and fly very high for us to look up at. A piece of paper can have multiple fates, not to mention What about us? Destiny is like the lines of a palm, twists and turns, but no matter how it changes, it is always in our own hands.

As for the composition, of course it is better to do it yourself. You should be able to write it according to the material 6 . A 120-word essay on a small experiment

In a nature class, the teacher asked us to do a wonderful little experiment - holding water with pieces of paper.

In the nature class, the teacher briefly explained the experimental method and then asked us to do the experiment. After the experiments of the previous classmates were completed, it was my turn.

I walked to the podium, first turned on the faucet, and carefully filled the cup with water. Then I picked up a piece of paper, put it on the cup, pretended to use my strength to suck milk, and pressed the paper hard. For a moment, then quickly reverse the cup, and guess what? The piece of paper was completely absorbed by the cup, and not a drop of water in the cup came out. This made me puzzled, why was the piece of paper sucked on the cup? Why doesn't the water in the cup flow out? This really makes me, the second monk, scratch my head. I thought: Could it be that I have seen a ghost? Or is the gravity of the atmosphere helping the piece of paper? I asked the nature teacher with questions in my head. ah! It turns out to be so magical! It turns out that the atmospheric pressure is causing trouble. The surface tension of the water in the cup completely closes the paper and the cup. Therefore, the pressure of the water in the cup is less than the pressure of the atmospheric pressure outside the cup. In this way, the atmospheric pressure holds the paper firmly in the cup. Once it is on, the water in the cup will naturally not flow out. "So that's it, how wonderful it is!" I said suddenly. I thought: I must do more experiments like this in the future to enrich my extracurricular knowledge.

It can be said that there are many wonders in the world, and there are many mysteries waiting for us to discover, explore, and study, so that we can learn more and more. 7. A composition about doing a small experiment

Science, these two words sound far away from us. In fact, it is all around us. Now I will tell you about a small scientific experiment of mine.

One morning, I was making noodles at home. Later, I wanted to make a poached egg as a side dish. I took out a fresh egg from the refrigerator. When I looked at the egg, I thought: How fragile the egg is, and it breaks into pieces when I knock it lightly. At this time, I suddenly wanted to try to see if I could crush the egg, so I squeezed the egg with one hand and used all my strength, "Err, eh!" I gritted my teeth, eh? What's going on? How did the egg become so powerful? I squeezed the eggs again and again, "Oh!" I finally failed. I was so tired that I was out of breath. Two big questions suddenly appeared in my mind: Why can eggs withstand so much pressure? Why do eggs break easily when knocked in one place?

Later, I checked Baidu, oh! It turns out that the structure of the egg shell is round, so when a person pinches it with one hand, the power of the hand slowly spreads on the egg shell, so that each part can withstand a little pressure. For example: It would be difficult for one person to move a big stone, but it would be easy if many people move it together. The reason why an egg breaks when you hit it in one place is because when you hit the area where you hit the egg, you use more force. The hit part suddenly bears such heavy pressure and has no time to spread, so the egg breaks easily. ! After knowing the reason, I was as happy as eating rice.

Science is everywhere. As long as you observe carefully and are good at thinking, you will definitely discover the existence of science! 8. A 400-word essay on the experiment of using a ruler to absorb scraps of paper

This afternoon, in the composition class for young journalists, the teacher asked us to do an experiment: a pen sucks scraps of paper.

The students discussed in a low voice below: "I have done this experiment before, it is simple." I saw them taking out a piece of paper, tearing it into small pieces, and rubbing it on their heads with a pen. Hold the pen close to the paper. I watched with my eyes wide open, but there was no reaction at all. He wondered: "What's going on? Why can't I suck it up?" He tried it again and again, but couldn't suck it up. I also took a piece of paper, tore it into pieces, and rubbed it on my head with a pen, but there was no reaction. I was distraught. The teacher came over and saw that I was unsuccessful and said to me: "You have to use a ruler or a plastic pen to succeed." I suddenly realized.

I took out a ruler from the pencil case and rubbed it on my head a few times, keeping it 1 cm away from the paper. Suddenly, the paper sucked up. I feel like the ruler has magic power. In fact, it has no magic power at all. This is caused by friction and electrification.

Through this experiment, I have enriched my life, broadened my horizons, increased my knowledge, and brought me joy.

9. Experimental composition on the endurance of a piece of paper

I am an ordinary piece of paper. It turns out that my sister, my parents and my family of four lived very happily, but that day this happy family But...

"Students, what we are going to do next is the dictation of new words this time." The classroom was very quiet, with more than forty students sitting neatly in their seats and listening to the teacher's speech. I lay on my back in front of the master Xiao Ming’s desk was not idle. My eyes stayed on the more than 40 pieces of writing paper on the teacher’s desk. I was looking for my mother. Soon my mother was sent back to Xiao Ming’s desk by the teacher. " Hey! Mom...I'm..." Before I could finish, I saw Xiao Ming shaking his head and sighing: "Oh...it's more than 40 points again, 10 words, 6 mistakes. How embarrassing! "As he said that, he grabbed my mother with his hands, rolled it into a ball, and threw it into the trash can. I was stunned and couldn't speak for a while. I just felt something spinning in my eyes. Xiao Ming's Xiaoli, the classmate at the same table, saw it and hurriedly advised him: "Xiao Ming, it's not good for you to do this. How can a piece of paper..." Before Xiaoli could finish speaking, Xiao Ming interrupted her. "You girls are so annoying, mother-in-law." "Our family is not short of money for this piece of paper. I not only support this, but also support this, this, and this!" Xiaoli sighed and ignored him.

When I was feeling sad for my mother, the classmate behind Xiao Ming patted him on the shoulder. Xiao Ming seemed to understand something, and he tore off a few pieces of paper from his notebook, hastily wrote a few big characters, and drew a few crooked words. Symbols, laughing "hehe" while drawing, most likely writing some kind of joke. Just as the classmate behind was about to pick up the answer, Xiao Ming told him again: "Don't forget to tear it up after reading it." When I heard this, I couldn't help but feel. A shudder: Dad is in there too! After a while, the sound of "hiss, hiss, hiss" came from behind. My heart was tugging, tugging, tugging with the sound.

I am really afraid that one day, I and I will be together. My sister was also brutally murdered. After a while, what I was worried about happened. Xiao Ming took out his sister, who was wearing snow-white clothes, from her schoolbag, tore it into several strips, and then wrapped them layer by layer into a thick little bag and handed it to her. I gave it to the classmates behind me and introduced it as a "prank toy". It looked like there was something inside, but in fact there was nothing. I was so heartbroken that I couldn't breathe, and I was shaking with cold.

I shouted to Xiao Ming at the top of my lungs: "Give me back my relatives! Give me back my relatives!" But he couldn't hear me.

In the dead of night, I looked at the moon outside the window and thought : What are we using paper for? Does our value only lie in being spoiled, or recording jokes or making pranks? I remember that before leaving the factory, the worker uncle said to us: "Your lives are given by humans, and you must repay humans. You are the carrier of human information, the documents that witness history, and the warehouse that preserves spiritual wealth." And now. ?

We come into this world with the dream of repaying and benefiting mankind, but how are we treated? Was wasted arbitrarily. Someone once calculated an account: waste paper accounts for 18% of the total amount of garbage in China. It takes 17 trees and 100 cubic meters of water to produce one ton of paper, and most of this water will be It turns into sewage and is discharged. It can be seen that paper has a close relationship with the natural environment. Schools are large paper users. On average, a middle school student uses 474 pieces of white paper a year. Based on this calculation, every 10,000 students use 4.74 million pages a year. Paper, and how much of it can be saved? Some people have calculated: a middle school with 36 classes, with 40 students in each class, prints 15 notices every semester, and 43,200 copies will be printed throughout the year. In fact, these notices It can be conveyed verbally. Sigh. I don’t want to think about it anymore. Will the ending of my father, mother and sister be waiting for me tomorrow?

A few days later, I was made into a propaganda slogan by the school teacher. The slogan was: "Save paper, protect the earth, starting from me!" Although my life is over, I am very happy. , isn’t a small habit a big truth? YES, save paper and protect the earth, it starts with me! 10. What are some simple experiments? (I want to write a composition)

Today, the science teacher assigned a homework assignment that you can explore with your parents.

Complete together. The teacher said: "The materials you need to prepare are: a spoon and a basin of hot water. Then put the spoon in the hot water. The question is: pick up the spoon after 5 minutes and see if it is all hot. Understand. Do you understand?" "Understood," the students replied loudly.

I thought to myself: It’s too simple. Only the end put in hot water is hot, and the other end is not. Haha, I can defeat my father and mother today... I feel so happy! As soon as school was over, I ran home quickly. After I got home, I first put down my schoolbag, then I finished my homework, then started preparing materials, and finally called my father and mother out of the room. I said: "The teacher wants me to do an experiment with you ***. The question is: put the spoon in hot water to see if the spoon is completely hot." Dad thought for a while and said: "It's better to do this. Let's do it." Everyone makes a bet, and then we do an experiment to determine who is right and who is wrong. "My mother said: "In my opinion, one end is hot and the other is not." I said, "I am the same as my mother. "My father said: "I think everything will be hot." I said: "Let's do it, the loser will sit on his back 100 times." Dad and mother said in unison: "Okay!"

Start doing it. After the experiment, Dad put the spoon into the water. I thought to myself: Dad can’t win alone. He also did 100 sit-ups, haha! Five minutes passed unknowingly. My mother went to get the spoon. I grabbed it and touched it. Huh? The end of the spoon that is put into the hot water is the hottest. When you touch it up slowly, it becomes colder and colder, but the top is still a little hot. I curiously asked my dad: "What's going on?" Dad said proudly: "I won, hehe, you and your mother have to do 100 sit-ups. As for what's going on, you can find out for yourself. , you can go online to check the information, and you can also ask the teacher.”

The next morning, I walked into the science teacher’s office with a puzzled look on my face. There were already many classmates gathered around to listen to the teacher. Answer. The teacher said: "This principle can be explained in one sentence. Heat conduction always passes from one part of the object (high temperature) to another part (low temperature)."

In fact, in the kingdom of science, there is There are many things that we need to discover and observe in order to gain more knowledge.

Just change it and it will be OK.