As time goes by, technology has been widely used around us. It is like a ray of warm sunshine, illuminating our road to prosperity; It is like a colorful rainbow, holding up the hope of the motherland tomorrow; It is like a gratifying spring rain, nourishing our long-awaited labor-saving and convenient heart.

In old China, where science and technology were backward, many problems brought inconvenience to people. When Qin Shihuang built the Great Wall in Wan Li, he spent a lot of manpower and material resources. It is said that the Great Wall of Wan Li is made of bones. In ancient times, there were no fast means of transportation. People use people's feet to transport letters, and it takes about three months to receive them. Instead of making a phone call and sending an email as it is now, it will be received immediately.

Time flies, the sun and the moon fly like a shuttle. Now, in this era covered by technology, people can see technology everywhere. The TV set at home can understand state affairs and relax; The refrigerator at home can store food so as not to rot; The washing machine at home can wash clothes quickly without hand rubbing; The computer at home can also check information online, chat with friends and so on. Out of the house, cars, vans and trucks are running on the wide road. Overpasses criss-cross and make people see things in a blur. High-rise buildings, like towering peaks, make people shine. Walking into the beautiful campus, the tall teaching building stands in the center of the campus, all because of technology. The classroom uses multimedia and bright lights, and the security door always guards the safety of the classroom.

2 1 century, wherever we go, technology is around us, relieving our fatigue and bringing convenience. It can be said that technology is everywhere.

Looking at this era surrounded by high technology, all this is the crystallization of the wisdom of the working people, the eternal pride of the people of China, and the only way for China to prosper.

Technology is with me!

(2) The composition made by science and technology is more than 600 words.

Last month, the school organized our classmates to participate in the 23rd Beijing Science and Technology Festival for Primary and Secondary School Students. Teacher Lu, a science and technology teacher, asked me to take an active part in this activity and strive for a novel and unique work.

From that day on, after finishing my homework every day after school, I began to seriously think about what to do. Suddenly, an idea that I had before flashed through my mind, that is, a gangster entered our school last year and tried to destroy it, but was found and subdued by the school teacher. It is also reported that some primary schools and kindergartens also have gangsters breaking into and injuring people. Since then, I have always had an idea, that is, can we design a simple and practical alarm device, which can give an alarm to remind the staff on duty in the reception room when the off-campus personnel enter our school.

Yes! I made a model of this alarm system, so I looked up a lot of information on the Internet and humbly asked my parents about this knowledge, so that they could take me to the electronic component store to buy the necessary components.

After thinking and research, I decided to name this alarm device "magneto-optical school gate identifier". Do it. I found an animal toy when I was a child. This toy is a monkey controlled by a photoresistor. When you block the photoresistor with your hand and leave, it will make a sound, but the sensitivity is very low.

So I decided to replace the photosensitive resistor with a set of highly sensitive transmitting and receiving photodiodes. Because the working principle of the toy is contrary to my requirements, after consulting teachers and parents, I added a triode as an inverter to turn the circuit into an alarm when someone passed the photodiode, and added a normally closed reed switch to the sound circuit. When our students pass the photodiode with a special identification magnetic card, because the magnetic card will attract the normally closed contact of reed switch, they will not give an alarm when passing. When an off-campus person without an ID card enters the gate of our school, once he passes through the photodiode, the alarm device in the reception room will alarm.

(3) Write a 600-word science and technology story for the first-grade composition.

Zhu Guangya: The brightest star in the distant sky.

He did one thing in his life, but it was the most magnificent force in the blood of New China. Fine deduction of physics is fun, and you don't have to stumble in this life. He is the brightest star in the distant sky.

Deeds 2011On February 26th, Zhu Guangya, a famous nuclear physicist and founder of "Two Bombs and One Satellite", died of illness. After the fall of the superstar, the "Star of Zhu Guangya" named after him always shines in the sky, inspiring future generations on the road of science.

From the late 1950s, Zhu Guangya spent most of his life in the nuclear field until his retirement in 2005.

"The elders of the motherland have placed infinite hopes on us. What are we hesitating about? " -Zhu Guangya, who is still studying at the University of Michigan, organized and drafted an open letter to students studying in the United States after hearing the news of the establishment of the New China.

Letter ",and then resolutely choose to return home, first to teach in Peking University, then transferred to the nuclear weapons research institute.

1964, the first atomic bomb developed in China exploded successfully. Zhu Guangya looked at the mushroom cloud leaping in the air and couldn't help crying. The road is blue, in order to open the forest. That night, because of his strict style, he got as drunk as a fiddler. Three years later, Zhu Guangya and his colleagues brought China into the era of hydrogen bombs.

Almost all the important nuclear tests were conducted by Zhu Guangya himself, and he won't stop until the problem is solved. When dealing with documents that need to be written or revised, Zhu Guangya tries to explain them in easy-to-understand language. He uses words carefully to ensure that even a foreign letter and a punctuation mark are accurate.

Indifferent to fame and fortune, people around me like to use this word to evaluate Zhu Guangya. 1996, Zhu Guangya received a bonus of 1 10,000 Hong Kong dollars and turned to donate it to China Engineering Science and Technology Award Foundation; 1997, a total of 40,000 yuan was donated to China Science and Technology Development Foundation. The People's Liberation Army Publishing House had planned a series of biographies of national defense scientists, and when they were submitted for trial, he did not hesitate to cross out his name.

(4) Science fiction story composition of about 600 words.

One day, I was walking in the park. Suddenly, something with a lot of light like a plate fell from the sky, with green light in the middle of the low plate, like a pillar. It took me a long time to realize that it was a UFO. I quickly hid behind a big stone. I saw the UFO coming out of the middle with a ladder. His head was big, his eyes were big, his arms were thin, long and short. Only about 1 m aliens come out of UFOs. It said strangely, "Come out, earthlings hiding behind stones. My radar hand has found you, I won't hurt you. " I walked out from behind the stone bit by bit and ran as fast as I could. The alien's hand immediately reached out and grabbed me. I pulled its hand away in fear ... finally, I overcame my fear and walked slowly. I gave it a drink. It put the drink on the ground, and then a piece of water flew into its mouth. I was shocked. It says it has the magic to suck things, and it sucks super water. You can also lift a house, and calculate a multiplication formula of hundreds of millions at 0.00 1 second.

I asked it to take me into the UFO, and it took me into the UFO. There are many machines in it, including a machine that converts light into power, and a super generator that can fly back to the base in one second and rotate 400 million revolutions per second. The antenna on the spacecraft can also receive signals from Mars, Jupiter and Venus.

I saw the voice of the spaceship: "There is something wrong with the power system. Has it been repaired? " The alien replied, "Yes." Five seconds later, the spacecraft said, "The power system has been repaired." I can't help but be surprised: "Your technology is really developed. You can fix the power system here in a short time! " He listened with a proud expression on his face. Then it said, "I'm leaving. My name is Kaguang. I'm a Martian. Goodbye. " A hundred lights flashed and the spaceship disappeared. I just stood there. ...

Get up ... my mother's voice rings in my ear. It was a dream. I thought, "I'm going to Mars to find Ka Guang in the future."

5. Write a 600-word composition on the topic of "Science and Technology"

1. So far, the most successful animal on earth is the dinosaur. Dinosaurs ruled the earth for 6,543.8+billion years, and there were many kinds in water, air and land. Dinosaurs flourished in the Mesozoic era (the Mesozoic era, that is, a geological age from 65438+8 1 10,000 years ago to 63 million years ago), but they became extinct at the end of the Mesozoic era and disappeared from the earth's surface. Almost at the same time, half of the known animal and plant species on the earth became extinct. Such a large number of biological extinction, which occurred in a very short time, naturally triggered.

Play with different guesses and assumptions. Some people think that the extinction of dinosaurs may be due to their overdevelopment, disproportionate body size and nervous system, which made them slow to respond and difficult to find food. At the same time, they also faced smaller and more flexible mammals at that time. Some people think that some plants on which dinosaurs lived at that time evolved into flowering plants, and dinosaurs could not adapt and eventually starved to death. The extinction period of this species happened between Cretaceous and Tertiary in Mesozoic, so it was also called C-T extinction. Coincidentally, in this ancient time, there was a thick layer of red-brown clay in the rock stratum of the earth. Geologists can find this kind of fine clay sandwiched between Cretaceous and Tertiary strata in many parts of the world, such as Italian, French, Tunisia, Danish and New Zealand. Judging from the thickness of this kind of clay, it is estimated that this kind of clay has been deposited for a short time, and it took 100 years to form. The American physicist L.Alvarez and his geologist son assumed that the source of this clay was not deposited by earth materials, but some micrometeorite dust that kept falling to the earth's surface at that time. If their hypothesis holds, the content of iridium in this red clay should be higher than that in other rocks on earth. The analysis results show that the content of iridium in this clay is 30 ~ 160 times higher than that in other geological rocks. This result supports Averys' hypothesis that this layer of sediment came from space rather than the earth.

2. Return the words about the sky written by my ancient blue-sky poet "There is no dust in the river sky"; The sky written by modern writers is "the blue sky is spotless and crystal clear". Unfortunately, it is rare to see such a beautiful "day" now. Especially in cities or industrial areas, it is really uncomfortable to be shrouded in smog all day. In the face of all this, you may be tempted to sigh: "Fresh, refreshing and clear breath, where have you been?" Hurry up and cure the "disease" of the atmosphere, and give me a blue sky and a red sun! We really have a lot of things to do, and the most important thing is to try to reduce the discharge of pollutants. Smoke and dust are mainly produced by the endless combustion of coal and oil. By improving the combustion mode, the fuel can be fully burned, and the smoke can be greatly reduced. Try not to burn loose coal, develop coal gasification and liquefaction, and reuse the fuel containing a lot of ash and sulfur after washing. The pollutants produced should be recycled by absorption, catalysis, adsorption and condensation, so as to turn harm into benefit and reuse. Even pollutants entering the atmosphere, we should try our best to reduce their harm. We should strengthen the greening of the city, plant more flowers and trees, and open up more parks and avenues. From the point of view of preventing global warming, to control the growth of greenhouse gases, especially carbon dioxide, we should try our best to use natural gas as fuel. If we can cancel the small chimneys of one household, provide central heating or implement power supply and heating cogeneration, we can save fuel and reduce carbon dioxide emissions. If the secondary utilization of aluminum in the world is doubled on the existing basis, the pollutants discharged into the atmosphere can be reduced by 6,543,800 tons per year. There are more than 400 million cars in the world, which emit about 654.38+83 million tons of carbon dioxide every year. In order to reduce the greenhouse gas emissions of automobiles, besides limiting the number of automobiles, saving fuel consumption and installing purification devices, cleaner fuels such as methanol and ethanol should also be tried to develop public transport vehicles and electric vehicles. Finally, the development and utilization of clean new energy is the most fundamental way to reduce air pollution. Such as nuclear energy, solar energy, wind energy, biomass energy, geothermal energy and other energy sources are clean, rich in reserves and have great development prospects. The destruction of the ozone layer is a global problem. The United Nations Environment Assembly decided that the production of chlorofluorocarbons, the "culprit" that destroys the ozone layer, will be phased out at the end of 1995. However, the life span of HCFCs is 50- 100 years, and150,000 tons of HCFCs have been lost to the atmosphere. So far, only a small part has destroyed the ozone layer, and most of the rest are still in action. The ozone layer will continue to be destroyed and will reach its peak in the first 10 year of the next century. As for the complete return to normal natural level, it will take at least a century! Air pollution is caused by human activities, and finally it has to be solved by human beings themselves. It's just time waits for no one. We'd better take resolute action from now on and take measures to purify the air and give me back my blue sky!

[6] Composition: Technology is around me.

The word technology is familiar to everyone. 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 whole family is sitting around, enjoying the delicious food prepared by my 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 instruments, it would be just an illusion for humans to land on the moon. ...

On the contrary, with technology, our life will be better-with fax, our documents can be easily sent out 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, people can feel as comfortable as spring even in hot summer. ...

It is not difficult to see: all this, people enjoy the achievements 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!

Once a science fiction story composition of 600 words.

The collision between heaven and earth 65 million years ago was much bigger than the collision between a comet and a tree, and the consequences were undoubtedly disastrous for the earth. Not only dinosaurs disappeared from the earth, but also reptiles such as pterosaurs, snakes, dragons and ichthyosaurs, as well as marine invertebrates such as ammonites and arrow stones. At the end of Mesozoic, there were 2868 genera of animals and plants on the earth, and only 1502 species remained at the beginning of Cenozoic. 75% of species are extinct, which is a real biological catastrophe.

I just became a scientist at the beginning of the 22 nd century. But it didn't last long. More than a month later, the United Nations announced to the world: "There are two asteroids in the asteroid orbit between Mars and Jupiter, which are rushing towards the earth at a speed of 60 kilometers per second due to the influence of the sun's gravity. They will arrive in new york in 4 days, 3 hours and 48 minutes. Although these two asteroids are much smaller than the celestial bodies that destroyed dinosaurs, they can turn new york into invisible with an explosion of 100 million tons, resulting in a pothole with a diameter of 200 kilometers, and its influence is spread all over the world. Once the winter of the universe comes to the earth, the era of human domination of the world will end. Please ask scientists who want to help the earth escape this disaster to report to the United Nations Cosmic Emergency Rescue Team, and we will do our best to help you complete this task. " After hearing the news, I thought, "As a scientist, I have the responsibility to protect the earth." So, I decided to "volunteer" to sign up for the United Nations cosmic emergency rescue team. ...

As soon as I entered the laboratory, I found that more people signed up for this rescue team than I expected. After a while, the leader of the rescue team came over and said to everyone, "We mainly invented a weapon to deal with these two asteroids. Let's think about it. What kind of weapons can we invent? " After hearing this sentence, we immediately lost in thought. ...

"I thought of it!" Two hours later, this sentence suddenly broke the silence of the laboratory. It turned out that Xiao Li had an idea. His method is to fire twenty nuclear bullets at two asteroids at the same time, so that the invaders can be completely eradicated. We all agree to do so.

Three days later, we made all twenty nuclear bombs. There are still 48 minutes before the asteroid hits the earth. We dare not delay any longer and immediately transport the nuclear bullets to the launch site. Everything is ready, only the command to launch is heard on the radio. "Three, two, one, fire!" Twenty nuclear bullets rushed into the sky at the same time. 15 minutes later, only two loud noises shook the earth, and the two asteroids were no longer visible in the astronomical telescope. Suddenly, people all over the world became active, and cheers and laughter rippled in the air.

(8) 600 words of scientific composition.

Science and technology are everywhere, which makes us feel extremely proud. Our food, clothing, housing and transportation are inseparable from the contribution of science and technology.

Inventions and creations in the 20th century have brought endless changes to mankind. Zipper: seamless; Washing machine: liberating the labor force; Vitamins: make the tree of life evergreen; Rice cooker: uncooked rice is cooked into cooked rice; Air conditioning: There are four seasons like spring here; Cixian floating train: a train that can "fly"; Neon lamp: sleepless pearl ...

Ah! Now the technology is really developed! Even our school has endless science and technology.

In a science class, Mr. Wang gave us a lesson about electricity and magnetism. Teacher Wang told us: "The electric energy in life originated from 1820. In an experiment, Danish scientist Oster accidentally put the electrified wire close to the compass and found that electric energy produces magnetism. Because of this discovery, it opened the door for human beings to use electric energy on a large scale. " In the following time, we did another experiment. We first prepared a compass, a battery and a wire, then straightened the wire, removed the plastic at both ends of the wire to expose the copper core, and then connected the copper core at both ends of the wire to the positive and negative poles of the battery. Then we approached the small compass, and at this moment we observed that when the wire approached the compass, the compass suddenly turned around. After disconnecting the current, the compass is as quiet as a child who has just been taught. The teacher told us so.

Science and technology support civilization and create the future. The future is in our hands. Let's become knowledge explorers, roam on unknown roads, and make the world we live in a better place with unlimited creativity!

Levies 600 words of scientific and technological composition in life.

Science in life _600 words

In our life, there are many scientific tips. For example, "What's the crackling sound when you take off your sweater?" "Why does a flat ping-pong ball bulge when scalded by boiling water?" Wait a minute. Now, I'll explain them to you one by one.

I remember last summer vacation, my mother brought some ping-pong balls back, and we rushed to get them. We throw table tennis on the ground like a pinball and let it bounce. Suddenly, the sound of "ga" attracted our attention. It turned out that my cousin's ball was accidentally crushed by him, and he immediately sat on the ground and began to cry. Mother put its ball in a bowl filled with boiling water. Slowly, the ball bulged. My cousin didn't want the wet ball, so he changed it with me. I asked my mother, "Mom, why did the flat ping-pong ball swell up in boiling water for a while?" Mom said: "This is based on the principle of thermal expansion and cold contraction. The air inside the table tennis is heated and its volume expands. When the flat place is pushed up, the table tennis will recover. "

One winter, I found another problem.

One night, when I took off my thick sweater to get ready for bed, I heard the crackling sound of my sweater and was very curious. I ran to ask my mother, "Mom, why does my sweater make noise when I take it off?" Mom said, "It may be static electricity. I have no idea. "

I'll get dressed right away and check the information. Oh, it turns out that this is electrostatic discharge caused by friction. When we wear sweaters during the day, our bodies and clothes are charged because of constant exercise and constant friction between sweaters and shirts, shirts and bodies. These positive and negative charges overlap and discharge, so we will hear a "click" sound. Ah, I see. It turns out that there are so many tips about science in life!

So we should explore bravely and acquire knowledge by ourselves.

⑽ About 600 words of science and technology fairy tale composition.

Once upon a time there was an honest little white rabbit. In the first grade, Aries teacher will choose a classmate as the monitor.

This may be difficult for Aries teachers. She doesn't know which classmate should be chosen as the monitor. Suddenly Teacher Aries had a brainwave and came up with a solution.

The next day, Mr. Aries said to his classmates, "I will test you this time." Anyone who passes can be a monitor. "

"Teacher, what's the problem?" A classmate asked.

"This problem is not difficult, that is, I will give everyone a seed, and within one month, you will grow it into the most beautiful flower to see who is the most beautiful and bright!" Teacher Aries said.

"This is not difficult at all!"

"My flowers are the brightest and most beautiful!"

"I know how to grow flowers best!"

..................................................................................................................................................................................

The goat teacher distributed seeds to the students.

A month passed, and Teacher Goat saw all the students holding beautiful flowers. She walked past the students without a smile, but saw the little white rabbit holding a pot without flowers and asked, "Why are you holding an empty pot?"

"I planted it for a month, but it just doesn't grow roots." The little white rabbit replied.

Teacher goat pulled the rabbit and announced, "I declare that the monitor of our class is the rabbit!" " "

Everyone looked at the goat in surprise and asked, "Why did the teacher choose the rabbit as the monitor?" Our flowers are beautiful and bright, but the little white rabbit is holding an empty flowerpot! "

"I said, I want to test you, you didn't pass, this time I test your honesty. In fact, the seeds I sent are all boiled, so it is impossible for such seeds to grow flowers, so you bought these flowers? "

The students all hung their heads in shame.