No matter in study, work or life, everyone is familiar with composition. Composition can be divided into primary school composition, middle school composition and college composition (thesis). Still at a loss for composition? The following is a wonderful scientific composition that I have compiled for you. I welcome your reference and hope it will help you. Wonderful scientific composition 1
Science is the space for human growth. It is it that makes mankind know so much profound scientific knowledge; It is it that makes us understand the mystery of nature; It is it that makes us have so many scientific inventions ...
Science is very wonderful, not only scientists, but also many interesting scientific knowledge around us.
refraction of water surface
In our leisure time, many people will go to the lake, the river, and go fishing, fishing for tadpoles and rocks, and often have fun. However, when we went to catch something in the water, we leaned over carefully after seeing it, and suddenly fished it with our hands or utensils. We thought it would be full, but when we lifted it, we found nothing in the net. Many people will wonder why they look at that thing in a certain position underwater, but when they go fishing, they find that there is no such thing in that place. In fact, eyes can sometimes deceive people. It's better when the water is shallow, and it's very obvious when the water is deep. The water is not flat, and when the light shines on it, it will form a refraction under the water, because when fishing on the surface of the water, you must ask for it before or after you see it, and you will certainly catch it. Sticking potatoes through straws
Seeing this topic, too many people will think: How can potatoes be so hard and straws so soft?
I also did this experiment, which proved that this sentence is true. When you put the potato on the table and tie it with a straw, the thumb of one hand presses the other end of the straw. When you tie it, it becomes extremely hard because the air in the straw cannot be released, and of course you can tie the potato through.
paper and plastic bottle
when you put a bottle upside down (the cap is screwed tightly), see if the water can flow out. Of course, you don't have to try to know that water will never flow out. If you replace the bottle cap with a piece of paper, can you still keep the water from leaking out?
I also tried it out of curiosity. First of all, cut a piece of paper to a suitable size for the bottle, fill the bottle with water, and press it with paper while squeezing out the air. The magical scene happened: when it was inverted again, the water really didn't leak a drop. The pressure of air and water tightly press the paper, so that the paper and the edge of the bottle are closely attached, so that there is no leakage.
After three experiments, I know that science is beyond my imagination. As long as I study it, I will find something. Science is so wonderful, we have to believe it! Wonderful scientific composition 2
On this Saturday night, I was sitting on the sofa watching a documentary about the earthquake. Dad came back with a heavy-looking box in his hand. I asked my father curiously, "What's in this box?" My father said to me, "This is an earthquake simulator, and we can use it to understand how the house collapsed during the earthquake and how to keep the house from collapsing."
He sat down on the sofa and suddenly asked me, "Yo-yo, can you build the iron bars with magnets in these boxes into a house structure and not collapse when the power is turned on?" I thought: what's so difficult about this? It's just a mere earthquake with magnitude 4, and it won't collapse if you take it casually. I didn't even think about it, so I put the shape of a house on a small platform connected to the power supply, then turned on the power supply and adjusted the vibration level to the normal mode of level 4. But the situation of the experiment was bigger than I expected, and it collapsed before a few whole times. I was very puzzled and thought, how can this happen? Aren't all houses of this structure? . I became cautious again and carefully built a more accurate model, but the result was exactly the same as the first time, and it collapsed again without a few shocks. My mood was just like a deflated balloon, and my high mood shrank back immediately, and I kept saying to myself, What's the matter? It can't be wrong! In desperation, I can only ask my father for help. My father took down the eight iron bars I built on the roof one by one, put them into big forks on the four square faces below, and said to me, "Now let's take a look. Will it collapse?" When I started the program, I didn't expect this model to be as reassuring as it was, and it didn't move. After the earthquake, my father's model was still standing on the platform. I was very surprised and quickly asked my father: Dad, why do you put it like this, and the structure built by these iron bars won't collapse? "Dad told me that the reason for this is that it can disperse gravity and prevent gravity from concentrating on a certain point. If gravity is concentrated on a certain point, it will cause pressure when it collapses, so that the casualties will be even greater.
I didn't expect such a small change to cause a huge change in the result. What a wonderful world of science! Let's continue to explore together! Wonderful scientific composition 3
In science class, we learned about nails, but why do nails rust? What does its rust have to do with? This is a problem.
So, is the nail caused by air rust, water or other substances? So, we went home to observe the experiment.
Actually, I think the nail rust is related to the air, because nails are always exposed to the air. It may be that some substances in the air come into contact with nails to make nails rust. But in fact, there is another substance that can make nails rust faster. On the first day, I prepared three transparent cups, each with two brand-new nails. A cup is filled with air, without any other substance; A cup enters the water, which is to test whether the rust of nails is related to water; Another cup is filled with cooking oil, which is to test whether the rust of nails is related to air, because there is no air in oil. The experimental materials are ready. What we have to do now is to observe and record them every day.
the next day, I was surprised to find that the water that had been ignored by me turned out to be the fastest substance to rust nails. In the cup filled with water, those two nails actually had some brownish-yellow substances, which looked like enlarged bacteria, and turned out to be transparent. Now there is a trace of yellow in the water. On the contrary, whether the experiment is related to air has not changed much in oil and air. The experiment is not over yet. Let's see what happens next.
on the third day, the nails soaked in water changed even more. It is almost impossible to see the original color of the nails, and some orange granular substances have been precipitated at the bottom of the quilt. There is still no change in the nails soaked in edible oil, but in its control group, the nails in the air have changed a little, and some small black spots appear on the nails, which are like black particulate matter covering the nails.
after three days, the biggest change is the nails soaked in water. So can it be said that the rust of nails is related to water?
I think: you can't be what others say, but you should practice it yourself. Wonderful scientific composition 4
Finally, it's Saturday. My mother and I have an appointment: to do small scientific experiments together. I am looking forward to it! In the morning, my mother smiled and said to me, "Ziyan, we are going to do a small experiment!" " I ran quickly and looked surprised: "What experiment is mom?" Mom said, "Don't worry too much. Watch every step carefully and record it."
Mom has prepared: glasses, table tennis, eggs and half a bowl of salt. Mom told me that today's experiment is to make eggs float! How is that possible? Mom, are you mistaken? I looked at my mother with a puzzled face. Mother poured a large glass of water into the glass, and then asked me to put the ping-pong ball into the water. I know, because it is very light and will float on the water. Mother went on to say, "Next, we let eggs the same size as table tennis float in the water." Mother carefully put the egg into the water, only to see the egg perched precariously in the bottom of the water. My mother said to me in a mysterious tone, "Next, please keep your eyes open and look carefully. It's time to witness the miracle!" " I stared at my mother with my eyes wide open for fear of missing an action. I saw that my mother put a spoonful of salt into the water and stirred it slowly, but the egg still didn't move. Then my mother scooped five spoonfuls of salt into the water and kept stirring. The water slowly became turbid, and gradually the eggs seemed to wake up from sleep and danced in the water! In a short time, the bare little head leaned out of the water. Mom really let the eggs float in the water!
what the hell is going on here? My mother told me that when the density of an object is greater than that of water, it will sink; On the contrary, when the density of an object is less than that of water, the object will float. There is air in table tennis, which is much less dense than water, so table tennis can easily float on the water. The density of eggs is slightly higher than that of water, and they will sink to the bottom of the water. We add salt to clean water in order to increase the density of water. When the density of salt water exceeds the density of eggs, the eggs will float.
I see. It suddenly dawned on me that natural science is really wonderful! Wonderful scientific composition 5
The continuous drizzle moistens everything, and the sun smiles again. Birds are singing happily, and the plants are dripping with dew, as if they are praising the light rain. Chinese rose flowers on both sides of the road, red flowers stand upright on the green branches and leaves, and time floats on the colorful flowers. On such a beautiful day, my mother and I visited Tianmen Science and Technology Museum.
as soon as I entered the science and technology museum, I was shocked. "Wow, a lot of things!" I can't help admiring that the acousto-optic experience, electromagnetic exploration, movement and rotation, and mathematical charm are dazzling.
"Birds in Cage" is the first scientific and technological exhibit that attracted me. It is cylindrical in shape, and there are several birds with different shapes spreading their wings and flying. I quickly turned the handwheel and saw the bird "snow snow" and flew into the cage. Why is this? My mother and I looked at its introduction at the same time. It turns out that when the human eye observes the scenery, the optical signal enters the brain through the optic nerve to form vision. This vision will stay at . 1 second to . 4 seconds, so the naked eye thinks this is a coherent and unified action.
I took my mother's hand again and came to the "sound horse is the main wave". What kind of novel equipment is this? According to the instructions, I pressed the "Start" button, selected the source frequency in the "Frequency Selection" area, and observed the shape change of particles in the tube. Press the "demonstration song" button to observe the fluctuation state of particles in the tube again.
There are so many scientific equipments here that we can't cope with them. What fascinates me most is "bone conduction". There is a round copper disc on the cube table top, four opposite sticks made of different materials on the right upper end, and the same round copper disc on the left upper end. The operation process is to press the "auto play" button or the "external sound source" button, and insert the audio connector into its own sound source to hear different sounds. It is said that this creation has brought good news to many patients with hearing diseases.
Today's visit to the Science and Technology Exhibition not only broadened our horizons, but also learned many scientific principles. What a great gain! Wonderful scientific composition 6
On Sunday morning, the weather was sunny and cloudy, and there was a continuous drizzle falling gently in the afterglow, which was very pleasant. Today, I propose that the whole family go to the Science Education Museum to expand the family's learning territory.
There are many stereoscopic images in the museum for tourists to take pictures, one of which is a simulated image of the laboratory. My brother and I stood by the stereoscopic figure of the doctor, and my mother picked up the camera and snapped this precious picture. I look up at the floors above, and the spirals make me dizzy. The scientific exhibitions and natural knowledge contained in these floors are waiting for me to explore.
From the third floor to the sixth floor, there are different themes, such as "The Mystery of Human Body", "Biodiversity", "Physical and Chemical World" and "Earth Science", and each theme is divided into different but related exhibition halls, which is dazzling and confusing. Due to time constraints, it seems that it is impossible to fully enjoy the essence of each exhibition area. There are two completely different natural concepts in the mystery of the human body, which describe the evolution process of human beings-to further understand the ancestors of human beings, and the other is the internal organ structure of modern human bodies and the atoms that make up human beings-to know our bodies and remind ourselves how to keep their balance and health. Biological diversity introduces the ecological environment and resources, and hundreds of billions of biological species dot our world, so life is colorful-at the same time, it teaches people to be kind to them. The world of physics and chemistry shows all kinds of different mechanical devices, motors and tools-identify their manufacturing principles in real life; The changes of chemical elements and substances are the contents of this area. The geoscience area integrates the geological characteristics of the earth, the changes of the four seasons and the biological history of the earth. The exquisite environmental layout makes me feel as if I were immersed in the wonders of the earth and take a virtual geological trip. All the pavilions in these six floors have impressed me so far that I can't forget to return.
Newton said: I am like a child who picks up shells at the seaside, but I spend a long time at the seaside and occasionally pick up a few shells that are more beautiful than others. Therefore, as long as we are willing to study in a down-to-earth way, we believe that on the way to study, we can enter a variety of different knowledge realms, enjoy and explore to the fullest, and always lead a more practical and fruitful life than others. In this way, the road to study is like a floral gallery, and we can bloom beautiful flowers anytime and anywhere. Wonderful scientific composition 7
Walking on my way home, I accidentally saw a pot of lush green plants, some of which looked like chlorophytum, but I understand that chlorophytum is not planted in water. Isn't chlorophytum a terrestrial green plant? Why can you live with water?
I immediately went to check the materials and asked the science teacher for information. It turned out that the roots of many plants are not easy to rot in water. For example, the cuttings of Liriodendron are planted in flowerpots after taking root in water; The stem of the green basket grows roots in the water before it is planted in the flowerpot; The roots of gentleman orchids and chlorophytum grow and bloom in the water. Often, the roots of plants can grow and develop in water, because the water contains dissolved oxygen, and the somatic cells at the roots of green plants can get enough O2 to carry out cell respiration to maintain life activities. The roots of chlorophytum can still grow and develop in water. Because of abundant water, there is no need to produce root balls to maintain water as in flowerpots. It is the main expression of the integration of microorganisms into the natural environment.
Therefore, I made an experiment to prove it: first, I got a chlorophytum, cut two main stems with the same growth and development, one was placed in the soil layer, the other was placed in an Aquarius filled with water, and at the same time, I put it on the same window and observed it for one month. As a result, it was found that the two main stems were living well, and the bottle of chlorophytum in water also grew white roots!
It does show that some green plants can live in the air, and the roots of many plants are not easy to rot in water, and even can grow new roots!
the globalization of science is amazing! Only say, since