Interesting experimental composition

In our daily study, work or life, everyone has tried to write a composition, which requires a complete text structure and must avoid an endless composition. So how to write a general composition? The following is an interesting experimental composition I collected for you. I hope it will help you.

Interesting experimental composition 1 One night, I did an interesting experiment. I asked my father to peel two apples for me first, and then I took two bigger bowls. Put some water and salt in the bowl, and then soak the apples in it. Don't put anything in the other bowl, just put the apples in. After all this, I am waiting for the arrival in half an hour.

In a blink of an eye, half an hour passed. I looked, ah! A miracle happened. I found that the apples that had not been put in the bowl had turned yellow. And the apples soaked in salt water are still so white and clean. "Why is this?" I asked dad. Dad said, "Because apples without salt water are oxidized in the air, the surface turns yellow." Apples soaked in salt water become so clean and beautiful. This is because salt has antiseptic and bactericidal effects. You see, people often castrate meat with salt, because people are afraid that meat will go bad, which is a pity. Now taste these two apples and compare them. As soon as dad finished, I picked up the apple soaked in salt water first, and I took a bite, hmm! That tastes sour and sweet, so delicious! I ate an apple without eating anything and took a bite. It's dry and astringent, and it tastes terrible.

Through this experiment, I know that salt also has antiseptic and bactericidal effects. Salt is really a good helper for us!

Interesting experimental composition 2 In the morning, we came to the composition class. The teacher came in with a plastic cup and a bag of edible salt in his hand, and the students began to talk. At this time, the teacher smiled and said, "Today we will do an experiment-let eggs float in salt water."

Next, the teacher carefully put an egg into a cup half filled with water, and the egg slowly sank to the bottom like an excellent diver. Then the teacher added three spoonfuls of salt to the cup and began to stir. After a few minutes, it seems that nothing has changed, and the eggs are still lying lazily at the bottom of the water. The teacher added two spoonfuls of salt to the water and continued to stir. The eggs are gradually changing. Like a diver who is about to lack oxygen, he slowly floats to the surface. At this time, a classmate asked curiously, "why can an egg float when it is obviously heavier than water?" "When salt is added to clean water, the density of water will increase and the eggs will float." The teacher explained.

This experiment gave me an inspiration. As long as we observe it carefully, we will gain something.

Interesting Experimental Composition 3 In the small orange lamp class on Sunday morning, tian teacher gave us a magical experiment called holding water on paper. When the students heard that they were going to do the experiment, they jumped three feet.

The experiment began. Tian teacher first filled the glass with water, and the water spouted like a stream singing. Then she gently covered the cup mouth with a piece of tissue paper. Then he asked, "Do you believe this thin piece of paper can hold a full glass of water?" Everyone waved their hands and said, "I don't believe it." Some nodded and said, "I believe it." Others are dubious. I thought: how can a thin piece of paper lift a glass of water? What medicine is sold in tian teacher's gourd? The teacher smiled without saying a word, only to see her turn at lightning speed 180 degrees. A miracle happened and the water didn't leak out. The paper sticks tightly to the mouth of the cup like magic. Everyone was dumbfounded with surprise. Tian teacher asked mysteriously, "Do you know why?" The students said in unison, "I don't know." The teacher told us: "Because the pressure of the air outside the cup is greater than the pressure of the water inside the cup, the air pushes the paper, so the water can't come out." The students suddenly realized.

This is really an interesting composition class. It not only teaches us writing methods, but also enables us to learn scientific knowledge.

Interesting Experimental Composition 4 In today's science class, Teacher Zhu made an interesting experiment with us.

The teacher first gave us experimental equipment: asbestos net, tripod, evaporating dish and alcohol lamp. The teacher said, "Let's start the experiment." We put the tripod on the table first, then gently put the asbestos net on it, then put the evaporating dish on it, and finally turn on the alcohol lamp and light it up. The teacher poured salt water into the evaporating dish.

Everyone is looking forward to it, fidgeting one by one, as if something is on their mind. I thought to myself: how to extract the salt from brine? This makes me puzzled. After a while, there was movement in the evaporating dish, and small bubbles began to appear, and then turned over and over as if the pot had been simmered. The students jumped up in high spirits. The teacher said it would evaporate for a while, so we held our breath. Seeing us in a daze, the teacher smiled. The students asked the teacher in unison, "Teacher, can you really extract salt?" "Yes!" The teacher answered firmly. We are dubious. What surprised us at the end result was that salt appeared. The students opened their mouths and looked at the powdery objects in the evaporating dish, unable to believe their eyes. Seeing the success of the experiment, the students were filled with joy.

Interesting experimental composition 5 Today, the teacher took us to a well-equipped laboratory and did many interesting experiments. Among them, what interests me most is the interesting experiment of ups and downs.

The laboratory environment is elegant, the ground is clean, there is not a trace of dust on the white experimental platform, the experimental supplies in the cupboard are neatly arranged, and the blackboard is full of all kinds of scientific knowledge, which makes me a little dizzying!

In order to let us know the truth of the submarine's ups and downs in the water, the teacher took out a small toy-the sinker. The students are curious. What did you say? I'll discuss it in one sentence. Seeing that everyone was so curious, the teacher taught us how to do ups and downs. As soon as the teacher finished, we couldn't wait to do it.

Doing this experiment requires a bottle of water, several nails of different sizes, a plastic dropper and a pair of scissors. First, cut the dropper at the edge of the bubble, leaving the bubble. Then, put the nail in the bubble, put the sinker in the water cup, cover the bottle cap, squeeze the bottle body with both hands, and the sinker will sink.

But my ups and downs can't sink, and then the teacher said, "If your ups and downs can't sink, you can wrap a few coils of steel wire around the nail." I did as the teacher said, and it really succeeded. I thought to myself: what a wonderful science! I must study science well in the future.

This interesting scientific experiment let me know the secret of submarine, the knowledge of ups and downs, and also let me know that only by studying hard can I be a useful person. This is really an interesting scientific experiment!

Interesting experimental composition 6 When we celebrate our birthday, we usually blow out the candles. Under normal circumstances, we will blow out the candles. So when will the candle not be blown out? Let's do the experiment together!

We have prepared candles, matches, white paper and transparent glue, which are all materials for our experiment.

The experiment began. First, the teacher took out a large piece of white paper, rolled it into a trumpet, and fixed the trumpet-shaped paper with tape. One end of the paper is a small mouth where pens can be put; At the other end is a big mouth, which can be put into a round pencil box. Then the teacher took out a match, lit the candle and asked two students to blow out the candle.

The teacher first asked Hercules to blow out the candles. Hercules was blowing into the small mouth, only to see him take a deep breath first, hold his breath, and then blow deeply. But the candle didn't blow out, and the first blow out failed.

The second time, the teacher asked "Little Lux" Marize to blow out candles. "Little Lux" blows his big mouth. I saw him take a deep breath first, then blow deeply, and the candle was blown out. Haha, it worked!

This experiment tells us that the world is full of mysteries, and every mystery is waiting for us to discover. This is really a happy experiment!

Interesting experimental composition 7 In the second class on Wednesday, a group of happy figures danced in the corridor. It turned out that the students in Class Two, Grade Five planted mung beans under the guidance of the science teacher and observed their growth. The mild sunshine shines on them, and they are really like little scientists studying something seriously. Look, the students are taking good care of their mung beans: some students use napkins to make "dirt", some students use droppers to pour water on the paper, some students are taking a bath for the mung bean doll, some students are covering the mung bean doll with a quilt, and some students are basking in the sun for the mung bean doll … How happy everyone is!

In the afternoon, the mung bean dolls put on their big coats one by one, and the sun gradually went to the west. Everyone moved the mung bean doll to a sunny place to do "sunshine gymnastics"

After school, mung bean dolls all put on a green bud hat. When the students saw it, they cheered and celebrated their success. ...

Beans are growing, and so are we. I hope the students will make progress every day and grow up happily like beans.

Interesting experimental composition 8 "Success, success." The classroom is noisy. What happened?

It turned out to be like this: Teacher Wang gave me an experiment. This lab is like this: Teacher Wang takes out salt, a spoonful and pepper. The students in the classroom saw it and immediately raised their hands and asked, Miss Wang, what are you doing? Miss Wang didn't speak, but she took out a blank sheet of paper. Teacher Wang said, "We will do an experiment about salt and pepper, and then separate them out." Later, some students said, "You can pour pepper and salt into the water." After this classmate finished, Mr. Wang took out his cup and poured salt and pepper into the water. Suddenly, pepper was immediately distributed above and salt was also distributed below. Finish this and tell the truth; "Although this is a good idea, but the spoon and white paper have no effect? Who else can do it? " No one raised his hand, so Miss Wang had to do it himself. She poured pepper and salt on the white paper, stirred it, took out a spoon and rubbed it on her arm for a while, then rubbed it on the powder a few times, and the pepper was sucked up. Last night, Teacher Wang said, "This is the scientific principle of friction."

This is really an interesting experiment!

Interesting Experimental Composition 9 In science class, my classmate Wang Yuanyuan and I did a very interesting experiment ―― volcanic eruption.

Our desk is full of materials needed for the experiment: volcano molds, baking soda water, citric acid and needles.

I tried my best to open the volcano mold. Wang Yuanyuan tore open the bag containing baking soda water and citric acid and carefully poured them into the "volcano" for fear of spilling water.

"Next, is to fill the needle with water. Leave me such a piece of cake! And the terrible thing that makes Huoshan angry is handed over to my classmate Wang Yuanyuan, hehe! " I am secretly happy.

When I spoke my mind, I looked at my classmate and saw the smile on her face. She said, "Good!" "As she spoke, she took the needle full of water from my hand." Ah! Am I a little too selfish? But now it's too late to regret it. "I think guiltily.

The exciting moment has arrived, and the volcano is about to erupt! I saw the water in the needle slowly flowing into the volcano.

"Hey? Why hasn't the volcano erupted yet? " So, I took a closer look. Bang, the volcano erupted! My heart is pounding with fear!

After the experiment, my classmates and I laughed at each other!

Interesting experimental composition 10 Life is full of learning, and today's learning is in our classroom.

Today, I found that our carambola teacher prepared a box of quail eggs, a paper cup, a bracket and an alcohol lamp. We were surprised and kept asking the teacher, but the teacher said, "Today we are going to do an experiment called boiling eggs in a paper pot." After listening to the teacher's words, we felt incredible, because as we all know, paper will turn to ashes when it meets fire.

Carambola said: "Everyone will not believe it. Let's look carefully." I saw Yang Tao assemble the bracket first, then took out a paper cup, put some cold water in it, put it on the bracket, put a quail egg in it, took out an alcohol lamp, took off the lid, took out a lighter and lit the alcohol lamp. We held our breath and stared for fear that the fire would burn the paper cups to ashes. Unexpectedly, one minute, two minutes and three minutes passed, but the paper cup was still not broken. The quail eggs inside were very comfortable, just like soaking in a hot spring. The fire below was like an elf, as if to say, "I don't believe it can't burn your small paper cup." In order to burn faster, the teacher covered the mouth of the paper cup and saw that the cup gradually had several black spots. The teacher asked us to wait for a while, then took out the eggs and peeled them. Wow, it's cooked. It smells good!

We are very confused. The teacher smiled and said, "This is because the ignition point of the paper cup is greater than the boiling point of water, so the paper cup does not burn to ashes."

Interesting experimental composition 1 1 Yesterday, the teacher asked a strange question in class: a cup was filled with water and then covered with paper. If you put your hand down, the water won't flow out. Is this possible?

We all say, "impossible" The teacher said, "You can do it after class or at home." . So I went home and couldn't wait to do it. First, I took a small cup and filled it with water. I also took a piece of white paper, covered it on the cup, and carefully turned it upside down. Not only did the paper not fall off, but also the water was not spilled. What's going on here? Why didn't the paper fall off? Why didn't the water overflow? I think it's strange. In today's morning reading class, I was as confused as a monk in Zhang Er. I asked the teacher eagerly. The teacher patiently replied: "Because a glass of water is full of paper, there is no air in it, and it is in a negative pressure state. Turn it over slowly, and the paper and water will not fall, because there is negative pressure in the cup, and the atmospheric pressure in the air' holds' the paper and water so that they will not fall. "

I suddenly understood the principle of this experiment. This experiment is really interesting, which not only cultivates our hands-on ability, but also lets us know some scientific knowledge.

Interesting experimental composition 12 In the first class on Thursday morning, Mr. Shan came in, holding a cup in his right hand, two empty cups and two boxes of paper clips in his left hand, and said mysteriously with a smile, "Today we are going to do an experiment called' Shenshui'." Teacher Shan slowly filled with water. Let the students guess. Will the water overflow when the paper clip is put in? Most students think it will overflow.

Teacher Shan asked Fang to come up and see if the water was full. Fang Yang Jun came over cautiously, looked around and said softly, "I'm not full yet." So Fang poured a little more water into it. This time he looked around and found that it was really full. Teacher Shan began to put paper clips. When the first, second and third paper clips were placed on the twentieth paper clip, Mr. Shan suddenly stopped and asked the students to guess whether the water would overflow if they continued to put them down. Fang Dao: "The possibility of twenty-one has overflowed." Teacher Shan continued to put the paper clip, and the students began to count again until they counted to fifty, and their mouths were deformed into the "O" in the letters. Teacher Shan began to put a hundred paper clips again, and the water was a little bulging, like a bun. Guess 10 1, will the water overflow? Teacher Shan put the paper clip on the168th paper clip again, and the water finally overflowed.

After the experiment, Mr. Shan told us that this is because water has tension. There is science everywhere in life. As long as you observe carefully, you will find something.

Interesting experimental composition 13 "What's going on?" "No paste!" "How strange!" Today, the students in the classroom are talking loudly about the ongoing experiment.

The experiment is about to begin. First, the teacher took out a bracket, an alcohol lamp, a paper pot and some quail eggs. At this time, the students were confused. Why did the teacher take out these things? When the teacher announced that he would cook eggs in a paper pot, the students opened their eyes like walnuts and their mouths turned into a "0" shape. I wonder myself: won't the paper pot burn?

The teacher first lights the alcohol lamp, pours the water into the paper pot, puts the paper pot on the bracket, and finally puts the quail eggs into the paper pot. Quail eggs jumped into the water one by one like divers. Suddenly, I smelled a little burnt. I thought to myself: it's over, it's going to catch fire. As a result, the fire didn't light and the water was already boiling. The water in the pot emits smoke, and the bubbles in the water giggle, as if many children are playing happily. Quail eggs did not move, as if nothing had anything to do with it.

After a while, quail eggs were ready, and several students ate them with relish. Although the bottom of the paper pot was burnt, it did not burn through. We asked the teacher why this happened. The teacher told us that the lowest burning point of paper is 130 degrees, while the boiling point of water is 100 degrees. After water boils, it evaporates and absorbs heat, so the paper will not burn in a short time and the eggs will be cooked.

This class taught me a physics knowledge, which is really meaningful!

One day in winter vacation, my father and I did a small experiment called "lava lamp".

It is called "Lava Lamp" because it will emit bubbles continuously after it is made successfully, just like lava is about to erupt. As the name implies, it is called "lava lamp".

The materials needed for "lava lamp" are water, pigment, edible oil and effervescent tablets. Then, my father and I started making. First, I pour water and red pigment into the glass in proportion and mix them together. Pour in cooking oil and add effervescent tablets. Dad has been watching this process. After reading it, he said calmly, "honey, your ratio seems to be wrong." Too little oil is injected. "I waited for it to bubble without saying a word, but it didn't seem to achieve the expected effect. Because there are no bubbles. Oh, I have to do it again. I sighed deeply. Seeing my sad expression, my father comforted me and said, "Never mind, let's start over. "

"well! Let's do it again. "

This time I learned my lesson, took a bigger cup, then mixed water with pigment to get 1/3, and finally adjusted the cooking oil to 2/3, and put an effervescent tablet in it ... After a while, the effervescent tablet reacted and bubbled, because water was heavier than oil, so oil floated on it. Seen from above, it looks like lava is about to erupt. After a while, I finally succeeded.

This time, I understand a truth, that is, don't give up easily to get closer and closer to success.

In this experiment, I not only learned knowledge, but also did an experiment. I'm so happy!

Interesting experimental composition 15 Will an egg float or sink in water? Let me tell you something.

Today, the teacher took us to do experiments. Materials include eggs, water, salt, transparent objects, water cups, etc.

The teacher carefully put the egg in the cup, and it sank like a sleeping baby. The teacher fished it up, added some salt to the cup and stirred it with a spoon. The turbid water slowly became clear again. The teacher carefully put the egg in for the second time and it sank again. We giggled, "The teacher lied to us! The egg didn't float! " A smart card said, "That's because there is not enough salt." The teacher added some more salt and stirred it. After a while, he put the egg in. Finally, the egg floated like a awake baby. The students shouted, "The eggs are floating!" The teacher pressed the egg down with a spoon, and the egg floated again, as if to say, "Don't press me, I want to see a wonderful world."

It turns out that it is the suspension force that makes the egg float. The principle of buoyancy is that when the water molecules are smaller than those in the egg, the egg will sink. When a large amount of salt is added, the molecules in the salt water are larger than those in the eggs, and the eggs with high buoyancy will float.

There are still many mysteries in nature waiting for us to explore!