Write a composition on the topic of scientific principles

1. Write a composition of about 600 words on the topic of "science". I will sing a hymn repeatedly to praise our great achievements in applied science and the greater progress you will bring.

In fact, we are in the era of applied science, in such a country of applied science. It's wrong to say that I'm not talking now! Just as some people think that uncivilized Indians are not rich in economy and unhappy in life, I don't think so.

In fact, it is of profound significance that children in enlightened countries like playing "India" games so much. Great applied science makes us reduce labor and make life comfortable.

But why does it bring us so little happiness now? The simple answer is: because we haven't applied science to practice reasonably. In wartime, science serves our possible poisoning and mutual harm; In peacetime, it makes our life hasty and unstable.

Instead of liberating us from mental work on a large scale, it gives people slaves-people spend most of their time in long, monotonous and disgusting jobs and continue to worry about their poor rations. You may think that the songs sung by old people like me are not good, but I have a good purpose in saying this-pointing out the importance and future of science.

In order to make your work benefit mankind, it is not enough to know only the applied science itself! To care about human beings and their fate, we must always cultivate interest in studying various technologies; Concern about the unresolved huge labor source and commodity distribution-for the establishment of our ideology, it brings happiness to all mankind instead of disaster. Never forget this in your charts and equations.

He also thinks that the last two sentences of Li Bai's masterpiece "Thinking about a Quiet Night" are "subjective shots"-"Looking up, I found it was moonlight" is looking up, and "Sinking again, I suddenly thought of home" is looking down. Painters read ancient poems and like to analyze the colors in them. She thinks that "Red in Green" and "An Almond Out of the Wall" emphasize warm colors, but use cool colors as a foil.

"White hair floats green water, and red palm stirs green waves" vividly depicts the bright colors of wild geese in the water, while Su Shi's "Dark clouds turn over the ink and don't cover the mountains, and white rain jumps over the boat" is an ink painting. I like Li He's dreamlike.

The poet began Conan's dream of roaming in space. What scenery did he see when he "looked back at the world"? Ah, "Looking at nine cigarettes in Jizhou from afar, a sea cup falls down"! It turned out that Kyushu, China, which he saw was like nine smoke ideas, and the sea was like clear water in a cup. This scene is as real as what astronauts saw in space.

However, Li He lived in the Tang Dynasty, never left the earth, and never heard of "space navigation". Besides, he only lived 27 years. I repeatedly recited "Dream of Heaven" and deeply admired the young poet's rich scientific imagination! I think Wang Zhizhi's famous saying, "Go up a storey still higher and broaden your horizons by 300 li" completely conforms to the laws of geometry.

Indeed, "if you look far, you must climb high and climb high to see far." The higher the observation point, the wider the visible range, which is the so-called "A" (Du Fu's "Looking at Yue").

In ancient times, people built tall beacon towers. Later, people first seized the commanding heights in combat. Until now, people have used the "high superiority" of airplanes and artificial satellites for reconnaissance, exploration and photography. Isn't the scientific principle the same as Wang Zhihuan's poems? Xin Qiji has lived in the countryside for more than 20 years, and his words contain rich agricultural knowledge. In Xijiang Yue, it is said that there is a good harvest in the fragrance of rice flowers, and listening to the sound of frogs reveals the organic connection between frogs and good harvest. Frog, commonly known as "goo goo bug", is an insect-catching animal.

Frog sounds are endless, insects are destroyed, rice flowers are fragrant, and grains are abundant. Xin Qiji wrote a vivid sentence in "Partridges and Days", which shows that the Song Dynasty has learned sericulture skills and is very good at mastering sericulture season.

His famous sentence in Bodhisattva Man, "Castle Peak can't be covered, after all, it flows eastward", conforms to the laws of modern thermodynamics, and shows that any object has a tendency to automatically reduce its energy, even Castle Peak can't be covered! In Du Fu's poem "To Eight Guards", there is an inconspicuous poem-"Cutting Spring Leeks in the Night Rain". In my opinion, from these five words, we can verify a lot of knowledge about leek cultivation in the Tang Dynasty: First, leeks are commonly known as "lazy vegetables".

Plant once and cut many times. I didn't know until I planted leeks in the Tang Dynasty that leeks are perennial herbs and can be cut very long, rather than uprooted and collected. Second, the Tang Dynasty knew that leeks in spring were tender and delicious, and they knew how to cut them at night in the spring rain. At that time, the cut leeks were watery and could be used as delicacies.

Interestingly, I often find that some poems are rare in literature, but rare in scientific research. For example, many people have recited the first two sentences of Li Bai's poem "Into the Wine"-"B". In fact, after "flowing to the sea" turns into steam, it is still "backflow", or it comes from the sky, falls into the Yellow River and then "flows to the sea", and so on.

China is a country of poetry. Over the years, many poets have written long poems and short sentences.

However, people are used to judging, selecting, interpreting and commenting on poetry only from the perspective of literature. In fact, poetry is scientific, so we might as well examine, select, annotate and comment on poetry from a scientific perspective.

How far are you and I from understanding scientific myths? 224500 Lu Yi Forest World Science and Technology Festival has arrived in Yancheng Junior Middle School, Jiangsu Province. Aunt Chicken has a question on the blackboard: Students, do you think science can create myths? Please use your imagination and do some scientific experiments to prove your idea. As soon as Blue Cat, Naughty and Feifei came back, they plunged into the lab.

First, seawater can also quench thirst. Just entering the laboratory, Blue Cat became thirsty. Go and get some water.

2. How to write a composition about the principles of science There is science everywhere in my life, but I don't pay attention to it. People's daily life is inseparable from science, especially in production, labor, sports, health and military affairs. "Proud of advocating science and ashamed of ignorance" circulates a lot of common sense in daily life, which is the experience of predecessors. Therefore, we take these common sense of life for granted as correct and beneficial, and often do it without thinking. Over time, it becomes a habit and makes your life troublesome, because these so-called "experiences" and "common sense" are just contrary to common sense in life. To believe in science, only by respecting it can we avoid taboos and be less troubled by it.

It's cold in winter, and the glass bottle cap often can't be unscrewed. No matter how hard it is. Experienced people can easily unscrew the bottle cap by baking it on the fire. Do you know why? This is the reason why it expands with heat and contracts with cold. When the weather is cold, the bottle cap shrinks and tightly bites the bottle mouth, which is not easy to unscrew. After the fire is heated and expanded, the bottle cap becomes loose and can be opened without much effort.

The old man's needle hardened, so she rubbed it on her hair. Do you know why? This is actually lubrication to reduce friction. People's hair contains grease. When the needle wipes the hair, it is equivalent to adding lubricating oil, which can reduce friction and make it easy to wear the needle.

Lunch meat, black beans and ketchup beans are all delicious canned food. They can be kept for a long time and are not easy to go bad. Because the can is sealed, bacteria can't get in. When people make canned food, the air inside is pumped out and then sealed. Without air, even if the food inside is stained with a little bacteria, they can't survive or reproduce! This makes use of the living conditions of microorganisms in the air.

Some foods can't be heated at high temperature, otherwise it will affect their nutrition and taste. For these foods, we can quickly heat them to a certain temperature (generally 60℃~ 85℃) 15 ~ 30 minutes, and then quickly cool them. This can kill most microorganisms in food and keep the original flavor. This heating method is called Pasteur disinfection, which was invented by French scientist louis pasteur.

Science should study various natural phenomena and find out the causes and laws of their emergence and development. Every little problem may lead to scientific discovery. Lsaac Newton was curious about the landing of apples and discovered the law of everything. James watt improved the steam engine by jacking up the lid of the pot after the water boiled. As long as we pay attention to observation and start exploring the problems around us, we can all enter the world of science. Science is all around us.

3. Write a 400-word composition on the topic of science and technology around you, thanks for the first one; "Science" is such a beautiful thing that many scientists are willing to devote their lives to it. Many people think that science is far away from us. In fact, science is around you and me. When the holiday came, I had more time to myself, so I became interested in scientific experiments. I did an egg "shrinking bone" experiment. I cooked the eggs, peeled them and poured them into an empty glass bottle. I stared carefully and found that the egg was shrinking, shrinking and falling slowly. Finally, I suddenly fell into the bottle. Although the book says that eggs will definitely fall into the bottle, I am still dumbfounded when I see this scene, and a little pride arises! "The test was successful!" I can't help crying. Why do eggs shrink and fall into bottles? With questions, I opened the book. It turns out that as the water temperature drops, the space occupied by water in the bottle becomes smaller, so the space occupied by air in the bottle immediately becomes larger. In this way, the air around the bottle will squeeze the eggs and force them to slide into the bottle. Oh, it wasn't "bone shrinkage" that made the egg fall into the bottle, it was the contribution of atmospheric pressure! Then, I did the experiment of "water pressure bubble". I first pour some washing powder into one bowl, stir it, then pour water into another bowl, dip one end of a toilet paper roll in a little washing powder water, and then put the other end into the water. At this time, a colorful bubble appeared. I repeated this experiment and found it really interesting. I didn't blow with my mouth. I just dipped one end of the toilet paper roll in washing powder water and the other end. Colorful blisters will appear immediately. I excitedly asked my parents to enjoy it, and my parents were amazed. They asked me what scientific reason this experiment contained, and I found the answer from the book: when we slowly immersed the scroll in clean water, the atmospheric pressure pushed the water in the bowl into the scroll, and the air in the shaft was squeezed and gradually rose, thus pushing the washing powder film to swell. Because the washing powder film has surface tension, it will not break after swelling. I see! I have gained another scientific knowledge. Dad wants to move two big glasses, and wants me to cooperate, but he is worried about breaking them. What should I do? Dad dropped a few drops of water on one cup, and then we carefully covered the other cup. As a result, the two cups actually stuck together. We easily moved two large glasses to a safe place. I'm a little puzzled: why can a few drops of water stick two cups tightly together? The book "Science" made me understand the mystery: the reason why glass sticks tightly together is because there is adhesion between glass molecules and water molecules. Adhesion is a strong attraction between different substances and molecules. Under the action of this force, two pieces of glass stick together tightly and it is difficult to separate. It seems that science is in our life. As long as we observe and think carefully and combine books with practice, we can discover scientific principles. Everyone is familiar with the word technology. Simply put, technology is technology. In a broad sense, it refers to the sum of natural science and technology and social science and technology. Since the reform and opening up, with the passage of time, science and technology have mushroomed in the motherland. Looking around life, technology is everywhere, and technology is by my side! Walking on the road at night, there are electric lights to illuminate us; Call a friend and take out your mobile phone at your fingertips; Back home, turn on the TV to watch the news, turn on the computer and chat with friends; Mother steamed rice with a rice cooker; Turn on the electric heater; The family sat around and enjoyed the delicious food prepared by their mother with an electric wok. Do you think we can leave technology anytime and anywhere? Technology is very useful! For example, if there is no electric car, it will be inconvenient for us to communicate with distant relatives and friends; If there is no EMU, it will be difficult for people to travel everywhere. Without the space shuttle, it would be empty talk for people to go into space; If there were no icebreakers, it would be difficult for us to go to Antarctica. Without space equipment, people would only dream of landing on the moon. On the contrary, with technology, our life will be better-with fax, our documents can be easily transmitted in an instant! With robots, you can be in a space that people can't reach; Using laser, you can make fitness equipment; With air conditioning, even in hot summer, it can make people feel comfortable as spring. It is not difficult to see that all this is the result of science and technology! This shows that technology has helped us create a superior living environment; Science and technology have improved our quality of life; Technology is the crystallization of the wisdom of people all over the world! We are engaged in technology, and we should constantly learn new technologies! Science and technology are around us, and we must vigorously develop science and technology.

4. Composition on the topic of science I love science.

Hubei Honghu Experimental Primary School 60 1 Shaoquan

Today, my mother bought me a set of parts for a model airplane. I jumped three feet high with joy, and a lovely little face turned into a big red peony in the blink of an eye, and I still twisted * * *, not to mention that happiness. In the afternoon, Deng Sai and Bai Fan were invited to help me assemble the model.

The work is ready. I divided the "tasks" for Bai Fan and Dunsai and started to act. I glued the deck with universal glue first, and then installed the cab. By this time, Deng Sai had finished playing the five-star red flag. Then I glued it on and started to make the hull. I put the bottom of the boat together with two bottom plates, and then put two side plates on it. Hmm! The basic shape of the ship is ready. Then, I fixed the hull with screws. At this time, the screw seems to be playing hide-and-seek with us, but it can't be found. Suddenly I thought that Zhang Yunchao had screws at home, so I ran to his house and asked for some. I came back sweating like a pig. But I didn't say anything, so I screwed it right away. In the end, only those tiny parts need to be installed, which is a big problem. I was just about to give up when Bai Fan said to me, "Shao Quanlin, didn't your mother tell you! Don't give up halfway, or you can't do anything well. Come and teach you how to do it. " After some guidance from Bai Fan, I realized that this was Zhang Fei eating bean sprouts-a piece of cake. Three times five divided by two is done. Take a closer look, ha! What a style! In order to be more realistic, we installed several small windows in the cockpit and made an observation room! We cheered and put the boat into the water to see its heroic posture on the water, but unexpectedly, the boat did not move, as if it were against us. At this time, Deng Sai shouted: "Ah! I forgot to make the motor! Sorry, hehehehe! " White sails and I stared at him, then put the copper core and iron sheet into Madanes, and then fixed the motor with screws and installed it on the ship. Then, install cannons and planes. Ha! A model aircraft carrier was born. We put it in the water and saw it swimming happily. ...

Suddenly, I seem to be a captain, standing on a ship I built and swimming in the ocean of scientific knowledge.

5. Write a 600-word composition on the topic of science. Since the tortoise won the championship in the last tortoise-rabbit race, the tortoise is very proud. Wherever he goes, he always likes to pose as a champion and feel great.

The tortoise has nothing to do all day, but also attends speeches everywhere to talk about his feelings of winning the championship. It is said that he will also write a book called The Turtle's Road to Champion to promote his good news of winning the championship. It often comes to Bunny's house to challenge. Very arrogant and asked, "Little Rabbit, dare to compete with me?" Little Nutbrown hare said, "Brother Tortoise, I lost last time, but I may not lose this time."

The tortoise was angry and said, "Black sheep, how dare you talk to me like this?" ? Not convinced, let's compare it again! "The next day, it is the day when the tortoise and the rabbit compete for the second time. The weather is clear, there are no clouds in Wan Li, and even the air is exceptionally fresh. In the early morning, the square was crowded with people, red flags were flying, gongs and drums were loud, and lambs, pigs, deer-even birds came to watch the fun.

The race began, only to hear the elephant referee give an order: "Prepare to run!" " "The rabbit flew past like a bullet. This time, she learned the failure lesson of underestimating her enemy and ran to the finish line in one breath, while the proud turtle was still sweating behind. This time, the rabbit won. Everyone cheered and congratulated the rabbit! Let's remember this sentence: modesty makes people progress.

6. Write a composition of 1000 words with humanistic feelings as the topic. This is a great era, which needs great spiritual strength to promote development, and humanistic feelings and scientific spirit are like two streams and two waves in this power tide. What will happen when they meet in the sea of our lives? In the emergence and development of human society, human survival and life should first appear, and then the emergence of human nature. In order to improve the quality of life and provide the guarantee of humanistic care, science and technology came into being. They are different from each other but inseparable, just like the waves produced by the sea and those promoted by Sina. "If you want to do a good job, you must sharpen your tools first." Scientific and technological progress is the guarantee to promote the realization of humanistic care and the catalyst to improve the quality and efficiency of life, remember. At that time, farmers failed to harvest, and famine spread without restraint. At that time, scholars and officials with conscience wanted to give people humanistic care. However, due to the backward level of science and technology, the distribution of grain is almost like that of daydreaming. In 1970s, like a loud noise, Yuan Longping cultivated indica hybrid rice, which met the food demand of thousands or even hundreds of millions of people. Isn't this the embodiment that science and technology provide protection for humanistic care? Just like the popular "eco-human" and "low-carbon life", without the emergence of energy-saving hybrid vehicles and the invention of environmental protection technologies such as drip irrigation, how can we talk about the slogan of "love nature as ourselves"? Science and technology, like Sina, is constantly moving the old wave of human nature. Not all science and technology can be used to improve life and promote society. With humanistic spirit, science and technology can play its due role and make the best use of it. Since the Second World War, a new type of energy-nuclear energy has become popular all over the world. In less than a century, almost the whole world can hear the discussion about "nuclear". Nuclear energy is like a double-edged sword, which can be used by people with humanistic spirit and conscience. In the hands of people with no conscience, it can be used to threaten mankind and destroy the earth. In this era, such examples abound, such as cloning technology, transgenic technology, network technology and so on. Only under the protection of human nature can these technologies exert great positive energy and promote social development. It's like the old wave of human beings reaching the Sina of science and technology, which won't gush out or drown. In the final analysis, science and technology come from life and are based on life. Constantly promoting the improvement of living standards is the fundamental purpose of the development of science and technology. Edison, the great inventor, invented the electric lamp to replace the oil lamp and steam lamp, which had many shortcomings. Similarly, human nature is based on life, and its purpose is to make life better. Life is like the sea, constantly producing waves of science and technology and humanities. Human beings without the support of science and technology are an illusory dream. Life without science and technology as the driving force is exhausting and inefficient crawling, while science and technology without humanistic conscience is the devil of those who waste their lives. Human nature, which does not take life as its starting point and purpose, is a flashy and useless waste and display. Humanity and technology come from life, which is higher than life. We can only adapt to the emotions and thinking of this era with higher imagination and cognition, devote ourselves to the cause that has made contributions to this era, and turn the collision of humanistic feelings and scientific spirit into integration. Only in this way can we correctly handle the relationship between humanities, science and technology and life, promote the continuous development of human society, and make us live a happier and more harmonious life in this society.

7. Write a composition of not less than 600 words with science as the topic. Physics is a science based on experiments, which studies the most basic and universal laws of matter movement, the basic structure of matter and its application.

Sensory physics is like exploring the mysteries of the world, no, it should be exploring. It broadens our horizons and stimulates our curiosity and thirst for knowledge.

When I was in primary school, I spent more time combing my hair in front of the mirror every morning because my hair was too long. At this time, I happened to find that when I raised my right hand, the "I" in the mirror raised my left hand; When I closed my left eye, she closed her right eye. I am doing all kinds of actions and postures in front of the mirror, full of doubt. The "I" in the mirror is just the opposite of me. I'm surprised. What's going on here? So, I immediately went to the bookstore to read a lot of books and materials. Unfortunately, because I don't know which subject or category this phenomenon belongs to, I haven't got any answers after a busy afternoon.

So, I asked a sixth-grade brother upstairs. I thought he was a sixth-grade student and would know more than me, but he also said he didn't know. With the belief that I will never stop until I reach my goal, I finally learned something from my nature teacher: "This is the original image of a flat mirror.

8. Composition on the topic of science and technology When I was in the second grade, I bought a computer at home and was immediately attracted by the flashing color pictures. At that time, no one in the family knew anything about computers. My mother installed my own "happy house" software step by step according to the instructions, and repeatedly told me not to touch the computer to avoid damage. I still can't help it. I got into trouble by playing computer while my mother was not looking. I can't let my mother know, because I have unloaded all the "happy homes" that my mother took a long time to put in. I was scolded then. The computer gave me a good impression at first, but suddenly it disappeared without a trace. I hate computers. I don't like them anywhere It is a monster. I often complain that my mother bought a junk and left it at home. From then on, I ignored the computer. Until the fifth grade, we set up information technology courses, which made me have a soft spot for computers. You can also contribute.

To tell the truth, I didn't take the information technology class seriously at first, and I won't take the graduation exam anyway. I don't even read the new book, so I have no choice but to listen in class. After a class, I changed my view on this matter. Information technology tells me that a computer is a machine for processing information, not a human brain. It also inputs information, remembers information, processes information and outputs information like the human brain, but I haven't mastered these functions yet. Just as people can't observe things with their eyes, remember what they see with their brains, think about what is written in their brains, and even write the results of thinking on paper, isn't this a sad result? With more and more knowledge of information technology, my attitude towards computers has also changed. It doesn't seem so annoying. The ugliness in the eyes of the past has turned into a smart head, and information technology can make it show its functions in front of my eyes. I can use the information technology I have learned to design a homework schedule for the class, with exquisite patterns inserted in it; I can input all my compositions into a computer to compile a book; Can make simple slides and FLASH；; You can also chat online and play interactive games. Information technology can help me do countless things, which makes me have an indissoluble bond with computers. Although I am very nervous about my study now, I turn on my computer every day no matter how late. One is to review my information technology, and the other is to relax when I am nervous. Information technology has become a tool for my entertainment. In addition, it is a good helper in my study. I can go online to find answers to questions I don't understand. Especially after my mother bought me an electronic dictionary, information technology played an important role and made the electronic dictionary my private "teacher". I love information technology, and I hope it can bring happiness and convenience to everyone.

9. Write an article about science

Author: Qianchusai composition network/

Whenever I go to school after school, I will look at the small invention I made in the fourth grade summer vacation in the window-wind chimes.

It was the summer vacation of grade four, and I had finished a lot of homework. It's just that the small production of this homework makes me nervous. Once, I accidentally saw a box of expired "Sanjing Brand Blue Bottle Oral Liquid" in the living room. I went over curiously and opened it. Full, I only drank one bottle! I want to drink these delicious oral liquids, but they have expired. What if you are embarrassed to throw it away? I had a brainwave: "I can dump the expired oral liquid in the bottle and collect the bottles outside to make a beautiful wind chime!" " " .

To start, I'll take the bottle out of the box first, stab a small hole in the bottle with scissors, then put the bottle down and let the oral liquid pour out bit by bit. After all the oral liquid was poured out, I put the bottle on the table. Find out some cardboard and double-sided tape that are not used in art class from home, and find out tools such as wool and scissors. After everything is ready, production will officially start.

My mind flashed a lot of wind chimes I had seen in the store, but I just didn't know what to do. I found a lot of art books, and finally found the "underwater world" wind chime in the art books of grade three. My mother and I discussed it for a long time and decided to do it.

I cut a blue cardboard into a circle, then cut off an acute angle on the circle, and then glued the two sides of the corner just cut off with double-sided tape, thus forming a funnel shape. Next, we will make pendants. Pendants are all kinds of underwater creatures. I drew a big crab on a piece of red cardboard, holding big and powerful feet and bulging eyes. It looks awesome! I cut it carefully with scissors. Cut a big, fat carp and a small turtle with a thick shell ... and prepare some wool of different lengths and colors and stick one on each creature's back. The second is to hang a bottle under each creature, which makes me wonder. How can I hang the bottle firmly on it? It's not nice to put it directly on the bottle mouth, and the bottle is glass, so you can't make a small hole. What should I do? I looked at the bottle in a daze. Suddenly, my eyes fell on the toothpick on the table. I had a brainwave and came up with a good idea. I divided the toothpick into two sections, picked up one section, tied it in the middle with wool, put the toothpick obliquely into the bottle mouth and lifted the wool. The bottle hangs steadily. I hang all the bottles in the same way. Finally, all the wool connected with the creature and the bottle passes through the center of the funnel and is twisted into a strand. Such a beautiful wind chime is finished. I showed it to my mother, and she loved it. She praised my good work and hung it in the living room with me.

Every time I go to the living room, I look at my wind chimes. Every time it is windy, my wind chimes will sing and dance in the wind.

Author: Qianchusai composition network/