The article about popular science is 200 words.
We know that everything has only three states: solid, liquid and gas, but are there really only three states in the universe? We can assume that human beings live in the deep seabed, can't reach the water surface, and can only touch solids and liquids. So will humans just think that everything is made up of solids and liquids? It can be inferred that there may be a fourth state somewhere in the universe, or even more. In short, nature is magical and we need to explore it. Since learning Einstein's equation of mass and energy, I have a new understanding of the universe: everything is made up of energy. At the beginning of the universe, it may be a mass of energy. Under very special conditions, an object is formed, and the mass of radioactive materials can be converted into huge energy. Energy and mass are reversible. You might ask in peacetime. Radioactive substances are converted into energy because they are in an unstable state, and the objects we usually contact are in a very stable state, which is difficult to convert into energy, but it is possible under special conditions.
The popular science composition is about 400 words.
Now the earth is all yellow, and the green is greatly reduced. What happened? It turns out that this is because people cut down a lot of trees, which not only makes birds lose their homes, but also causes collapses and floods.
Without trees, our earth seems to have no pillars.
Now all the shops are following our hobby, producing a lot of soft drinks. The "coat" of soft drinks is canned, which is a kind of pollution. Roads, parks and even schools have become their homes.
Some cans are made of aluminum, which is also harmful to human body.
Do you know that?/You know what? Do you know that?/You know what? Waste batteries contain a lot of heavy metal pollutants-chromium, lead, mercury and so on.
The pollution caused by waste batteries is slow and far-reaching.
When they are mixed with ordinary household garbage, under certain conditions, a series of chemical reactions will slowly occur, releasing toxic substances, which will pollute the atmosphere when burning and pollute groundwater or rivers and lakes when infiltrating underground; Once it enters the soil water source, it will enter the human body through the food chain, damaging people's nervous system, hematopoietic function, kidneys and bones.
Therefore, it belongs to hazardous waste.
Tests show that the amount of water polluted by mercury batteries exceeds the sum of a person's lifetime water consumption.
In the past, the river was crystal clear and small fish could be seen. Now the factory regards this river as a good place to discharge sewage in order to improve efficiency. The river was polluted by sewage, and passers-by quickly left.
Saving water means protecting our environment, that is, saving resources.
We should take our own practical actions to protect the environment. The simplest way is to start from ourselves and pay attention to saving water. For example, turn off the faucet at any time after use; Water the flowers with vegetable washing water, rinse the mop and flush the toilet.
Don't think that a few drops of water in the tap are nothing. If a faucet drops a drop of water every second, it will lose 36 cubic meters of water a year.
If a household saves one side of water every month, how much water does the whole country save in one month? Fortunately, now people have realized that the earth is polluted, and everyone has taken action. I hope those who haven't acted will bend down and pick up the paper on the ground, so that our tomorrow will be more beautiful and tidy!
Write a composition about popular science.
The mystery of the composition of matter reminds me of a remark made by Professor Seeburg, a famous chemist and Nobel Prize winner in chemistry, at the 1979 Annual Meeting of the American Chemical Society100th anniversary: "Chemistry-the key to human progress".
It coincides with your theme.
Chemistry is a science that studies the composition, structure, properties, changes and laws of changes of substances at the atomic and molecular levels.
It plays an important role in our understanding and utilization of matter. The world is made of matter, and chemistry is one of the main ways and means for human beings to understand and transform the material world. It is a discipline with a long history and full of vitality. It is closely related to human progress and social development, and its achievement is an important symbol of social civilization.
From the primitive society in which fire was used to the modern society in which various artificial substances were used, human beings are enjoying the fruits of chemistry.
Human life can be continuously improved and improved, and the contribution of chemistry plays an important role in it.
Chemistry is one of the important basic sciences, which develops rapidly with the mutual penetration of physics, biology, physical geography, astronomy and other disciplines, and also promotes the development of other disciplines and technologies.
For example, the research results of nucleic acid chemistry have raised today's biology from the cellular level to the molecular level, and established molecular biology; By analyzing the chemical composition of stars such as the earth and the moon, the distribution law of elements is obtained, and it is found that there are simple compounds in interstellar space, which provides experimental data for celestial evolution and modern cosmology and enriches the content of dialectics of nature! 1. Chemistry plays an important role in ensuring human survival and continuously improving the quality of human life.
Such as: using chemistry to produce fertilizers and pesticides to increase grain output; Using the chemical synthesis of drugs to inhibit bacteria and viruses and protect human health; Using chemistry to develop new energy and new materials to improve human living conditions; Using chemistry to comprehensively utilize natural resources, protect the environment and make human life better.
2. Chemistry is a practical subject, which, together with mathematics and physics, has become the basis for the rapid development of natural science.
The core knowledge of chemistry has been applied to all fields of natural science, and chemistry is an important pillar of the powerful force to create and transform nature.
At present, chemists use the viewpoint of chemistry to observe and think about social problems, and use chemical knowledge to analyze and solve social problems, such as energy problems, food problems, environmental problems, health problems, resources and sustainable development.
3. The intersection and infiltration of chemistry and other disciplines have produced many marginal disciplines, such as biochemistry, geochemistry, cosmochemistry, marine chemistry, atmospheric chemistry and so on. It has promoted the rapid development of biology, electronics, aerospace, laser, geology, ocean and other technologies.
Nowadays, chemistry is increasingly permeating all aspects of life, especially important issues closely related to the development of human society.
In a word, chemistry is closely related to human's basic necessities, energy, information, materials, national defense, environmental protection, medicine and health, and resource utilization. It is a practical subject urgently needed by society.
The topic of popular science composition is urgent.
Visit the Bird Science Exhibition, Youth Science Park Science Day, Science Caravan, Campus, Human Mystery Science Exhibition, World Space Science Exhibition, Robotics Science Exhibition, Bokepu Base Science Exhibition, "Origin and Evolution of Life on Earth" Science Exhibition, Wildlife Science Exhibition, Honeybee Academy Interview and Fun Science Entertainment Festival, and a trip to the science kingdom.
A composition on science and technology?
The following should change the times and make scientific progress.
With the development of science and technology, computers are gradually entering our lives, and the network has now become an indispensable tool in life, such as chatting, surfing the Internet and studying ... However, the appearance of computers has brought changes to people's lives.
Pupils seldom study online, but mostly play games and chat.
This kind of example is not uncommon.
It is with the advent of computers that there are all kinds of examples.
Technology changes life.
Although technology has made our life more comfortable, have they seen the deterioration of the environment? The air is getting more and more turbid, people can no longer breathe fresh air, and it seldom snows in winter. Don't you know? Technology has not only changed our lives, but animals are also doomed.
The turbidity of the air makes animals unable to survive, and the harsh environment makes most animals on the verge of extinction.
Technology changes life, and I hope that one day technology can really "change life".
I have a good habit since I was a child. Every time I finish the homework assigned by my teachers and parents, I will run to the study and sit in a chair and watch "100,000 Why" with relish. It will last for hours, and every scientific truth is deeply imprinted in my mind.
At the dinner table, I will also tell my parents all the new knowledge I have seen, so that I not only know a lot of knowledge, but also enhance my expression ability.
I have another feature-I love to ask why.
"Why is the sky blue?" "Why is the sea salty?" "Why did dinosaurs become extinct?" ..... Dad can't understand why there are so many "whys" in my little head. There are too many small question marks, and some of them stumped the teacher's father. At this time, I will look for the answer in the book. If I can't find it, I'll look for it in a big bookstore. In short, I must find them.
When I was a child, my dream was to be a scientist, and I wanted to invent something for everyone that is not in life but helpful to human life.
But what's the use of just talking and not practicing and dreaming? So I went to participate in many scientific and technological activities to enhance my understanding of scientific and technological knowledge.
You know, a successful scientist started at an early age. He is not a natural scientist. He must practice and imagine boldly, and he must persist and work hard.
And while doing scientific and technological activities, I also learned to persist, learn to work hard, and learn to ask teachers and adults questions that I don't understand.
We are no strangers to science and technology, because we live in the embrace of science and technology every day and enjoy the convenience and speed brought by science and technology every day.
Maybe you haven't found it yet, maybe you will question: "Technology? Where is the technology? " You see, technology is around you: TV, computer, mobile phone, mp3 player, rocket, satellite, spaceship ... and so on. I can't talk for days and nights.
In a word, life is inseparable from technology, and technology serves life.
Bit by bit, always doing everything, technology is everywhere.
When Watt invented the steam engine, the whole world made a sensation. Today, it is not surprising that we are sitting on the high light rail and high-speed subway. When an apple fell on Newton's head from the tree, the clever Newton discovered the gravity of the earth and invented many things according to its law.
How hard scientists have made from discovery to invention! Science and technology are developing rapidly, and life is trying to change.
Science and technology are changing our lives. We live in an era of rapid development of science and technology. We should be proud, we should be proud! Science is a key to innovation, and it can only be opened if it is mastered reasonably.
Humans are looking forward to the birth of another scientific and technological invention, which will make our life better!
What is the main content of popular science composition?
Visit the exhibition of national defense knowledge and popular science education. Today, our family visited the exhibition hall.
As soon as I entered the door, the conductor gave me a model of Shenzhou VI that could be launched for free. I'm so happy. Open it quickly and see what it looks like.
Dad said, "Let's go home and see. Let's see the exhibition first.
"after hearing this, I put away the model and went into this exhibition hall ... it was crowded with people, but most of them were boys.
I don't care that much. I looked at it and said, "Hey? What is this? " I asked, pointing to a yacht model in front.
Before we went forward, we read the introduction carefully. It turned out to be an American Nimitz-class aircraft carrier. Nimitz-class aircraft carrier is the most powerful maritime giant in the world today, and it is a large nuclear-powered aircraft carrier exclusively owned by the US Navy. Its power is beyond the reach of any maritime opponent.
It can be said that the Nimitz class aircraft carrier is the most representative member of the contemporary aircraft carrier family.
Captain: 332.9 meters, width: 40.8 meters, widest flight deck: 76.8 meters, draft: 1 1.3 meters.
There are 20 F- 14, 20 F/A- 18, 4 EA-6B, 16 A-6E. (including the card -6D), the aviation wing has four E-2C and six S-3A/Bs. Helicopters: 8 SH-3G/H Neptune or SH-60F Seahawk.
"Wow … so many planes can stop …" I cried in surprise.
Then, before we came to the model spaceship in Shenzhou 5, I pointed to the model and said, "It's exactly the same as real.
Wow! That's great.
"I hee hee smile, standing by posing," dad! Come and take my picture! "Hearing this, my father took out his camera phone, clicked it and took a picture of me.
Dad said; "Shenzhou 5 spacecraft successfully achieved China's first manned space flight, which fully shows that many key technologies on China spacecraft and rockets are already in the leading position in the world.
"Then, we came to the front of the American F 1 17 stealth fighter.
"Dad, not to say that the stealth fighter? How can my eyes still see? " I asked curiously.
Dad smiled and said, "You misunderstood this meaning. Well, the stealth fighter can't really be invisible, but we can't detect it with radar.
Why can you have this feature? Let's start with the way radar works.
The so-called "radar detection" means that the electromagnetic waves emitted by the radar will be reflected to the original direction by the metal surface of the aircraft and then received by the radar.
Radar can find the position of the plane according to the time difference between transmission and reception.
Stealth fighters are invisible to radar, so they are called "stealth" fighters.
We are proud of the third-generation fighter J-1O independently developed by China.
J- 10 is a light fighter with excellent performance, which embodies the achievements of China aviation industry in the past 20 years.
"What's that?" My eyes stayed on the rocket model.
"That's the Long March rocket series.
"Dad said solemnly.
China started to develop modern rockets from 1956.
1On June 29th, 964, after the successful test flight of the medium-range rocket designed and developed by our country, we began to develop multi-stage rockets and March into space technology.
After five years' efforts, the Long March 1 launch vehicle was born on April 24th, 1970, and the Dongfanghong 1 satellite was successfully launched for the first time.
China has taken an important step in space technology.
Now, the "Long March" series of rockets have gone to the world, enjoying a world-renowned reputation and occupying an important position in the international launch market.
..... The exhibition of national defense science education has made us know a lot of modern cutting-edge scientific and technological weapons, and the country must have a strong national defense as a guarantee. Therefore, we primary school students should study hard from an early age, and when we grow up, we will develop more and more advanced weapons for the motherland and make contributions to national defense.
540 words of popular science composition for primary school students
Unforgettable Life Six years ago, as a freshman, I entered a new school.
Time flies, time flies, in a blink of an eye, six years of primary school life is as short as flying, and now, I am about to graduate.
When I left my alma mater, my heart was full of nostalgia.
Forget it, every school teacher! You forget, kind eyes, forget your inculcation.
Your happy sweat and our growing concern are showers, and your knowledge nourishes our curious hearts ... In these six years, after the hard training of teachers, we not only learned book knowledge, laid a solid learning skill, but also learned a lot about being a human being.
Forget it, dear students! Forget the friendship between us, but forget the daily life of our time.
Looking back, it was a colorful yesterday.
Yesterday, we worked hard in the examination room; Yesterday, our game was on the court; Yesterday, we discussed it in the classroom; Yesterday, we were singing ... Yes, there was a chorus yesterday that I will never forget.
Forget six years of campus life! Every morning, the students arrive at school on time, but the morning exercise bell rings and the students stand up and turn around. In class, students listen carefully and actively raise their hands to speak; After school, the students are all active in the playground. The annual school sports meeting is wonderful.
In sports, in the cheers of students and deafening cheers, players on the field obey the rules, strive for the first place, and adhere to the principle of friendship first and competition second, if a small Olympic Games is being held.
Then there is my familiar campus life.
Ah! What a wonderful primary school life, how much happiness and harvest you gave me, I will never forget it!
The popular science composition is absolutely original! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ...
Learning and entertainment are the same. When watching the program "National Examination", I have a feeling that I will enjoy entertainment in my study, and I will strengthen my study through entertainment! Because this is an interactive entertainment program! Seeing the interactive entertainment between the host and the guests, talking and laughing, the host gave the topic and discussed it with three guests, so that the audience could actively participate and have hints.
They always discuss the problem for a while after a minute.
Learning refers to the eight questions given by the host, which are both fun and learned, and some are about the weather.
For example, after watching the short film, I asked which sheep it was. After the rain, spiders weave webs. What will the weather be like below? How much snow do two "*" represent? Entertainment means answering some questions, drawing a lottery first, and then continuing interesting advertisements.
There are also some rewards, such as 1-3 questions and 4-6 questions.
After watching this TV program, I feel that people will never stop learning. A lot of knowledge is not only of great help to our lives, but also requires us to understand that knowledge is power, knowledge is wealth, and knowledge can bring glory to our lives.
If a person has no knowledge, he will accomplish nothing, let alone contribute to society! Shigulu Primary School Si (2) Banding
How to write a popular science composition for primary school students
Saving energy starts with me. Since Faraday, a British scientist, discovered the principle of power generation in 183 1, electricity has become an indispensable and important energy source in less than 200 years.
With it, we can use electric lights, televisions, air conditioners, washing machines, refrigerators, computers and other household appliances; With it, the city will become brightly lit at night and traffic accidents will be reduced; With it, the machines in the factory have woven beautiful clothes for us.
However, according to the research of scientists, oil, coal, natural gas and other energy sources used for power generation are limited and non-renewable, and will be used up one day.
According to the current average speed of human energy consumption, oil will be exhausted around 2050, and even the most abundant solar energy will be exhausted after several billion years.
If the car goes out, the lights won't turn on, and the TV has no images and sounds, the computer will become a decoration. What a terrible sight, it's the end of the world.
However, this situation is entirely possible. Although scientists continue to study geothermal energy, biogas, wind energy, solar energy, nuclear energy and so on. Hope to replace oil, there has been no breakthrough development.
People should try their best to reduce the waste of energy when the new energy has not been successfully developed and the old energy is gradually exhausted.
China, in particular, has limited energy resources and needs to improve energy efficiency.
To save energy, we should start from the side and start from ourselves. The main methods are as follows: 1. Develop the habit of turning off the lights at will.
Second, take a shower quickly, don't play while washing.
Third, reduce the number of times to open the refrigerator.
Fourth, don't turn the air conditioning temperature too low in summer.
Don't listen to music, play computer games and watch TV endlessly.
In short, in our life, clothing, food, shelter, transportation and so on. We must rely on energy to make and use, so we should strive to be frugal in our lives and reduce any unnecessary waste. This is the best way to save energy.
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