Science and technology festival slogan
1, strengthen the popularization of science and technology and improve the scientific quality and comprehensive ability of citizens!
2. Strengthen youth science and technology education and speed up the cultivation of innovative talents!
3. Climb the peak of science and technology, explore cultural connotation, show artistic talent and let go of youthful dreams.
4. Comprehensively promote quality education and consolidate the achievements of cultural and artistic education.
5. Science and technology imagine the future, culture enriches the soul, art embellishes life, and passion ignites hope.
6, astronomical geography is more mysterious, whimsy is more fun!
7, technology brings happiness, technology brings dreams!
8, strengthen the popularization of science and technology, improve the scientific quality and comprehensive ability of the whole people!
9. Today's whimsy will be fruitful tomorrow.
10, vigorously carry out scientific, technological, cultural and artistic activities to comprehensively improve the comprehensive quality of teachers and students.
About the scientific knowledge around you
1. Why does milk have a skin after heating?
The skin floating on the surface of milk is solidified, protein. Milk contains all the nutrients necessary for the growth and development of cattle, and protein is one of the most important nutrients.
Protein will solidify when heated. Cooked eggs are frozen, because the protein in the eggs is frozen. Protein in milk will also be solidified by heating.
Protein, especially milk protein, will solidify even if it is not heated. Protein spoilage will produce acid, which can solidify milk. Although yogurt solidified by lactic acid bacteria can be eaten, it is better not to eat naturally deteriorated and solidified milk, because I don't know what kind of bacteria it will contain to make people sick.
2. What are matches made of?
Matchsticks are made of paper and wood. Wooden matchsticks are usually made of five or six kinds of firewood, such as poplar and walnut. In the round head of the match, there are potassium chlorate, potassium dichromate, iron oxide, sulfur, rosin, manganese dioxide, antimony sulfide and so on. Sometimes mix some lead monoxide properly. In order to facilitate the burning of matches, a layer of paraffin wax with the length of 1 cm is also coated on the pole next to the round head of matches. This part can be seen more clearly on paper matchsticks. The friction surface of the matchbox is coated with red phosphorus, antimony oxide, and sometimes manganese dioxide and silica sand as ignition agents. On the friction surface of the matchbox, when the match is rubbed hard, the red phosphorus on the friction surface burns first. This heat makes other oxidants release oxygen instantly, which ignites the paraffin on the stick and the match stick can burn smoothly.
3. Why does it make a "whoosh" sound when it is windy?
Once the strong wind touches the slender things such as wires or branches, it will make a "swish" sound. The slender whip shakes violently in the air, and a vortex of air is formed behind the whip, which makes the air vibrate and make a sound. The way the wind blows branches is like waving a whip.
Where there is an acute angle or behind the gap, the wind will also form this vortex, which will make a "swish" sound, and the tone will be different according to the strength of the wind.
Scientific composition
2 1 at the end of the century, a high-tech plane-"Super One" appeared in front of you. It is energy-saving, environment-friendly, convenient and quick. Let me introduce it now. There is a beautiful robot at the gate of the plane to meet the passengers. You don't need to use a plane ticket, just swipe it at the entrance with an ic card, because the plane ticket has been booked online before, and the information has been stored and sent to the plane.
When you sit in your seat, there will be an LCD screen in front of your eyes. You just need to press it, choose the drink and food you need, and the robot will be delivered immediately like lightning. You can look up information and play games online while drinking drinks, and you can also enjoy the beautiful scenery between the blue sky and white clouds through this screen. Now, we can use our mobile phones at will on the plane, and you can chat with your family and friends, but the plane is safe and everything is normal. "Super One" will stop at every stop and hang high in the air. Why?
Don't worry, look: a time tunnel suddenly appeared on the plane, reaching the ground. As long as you walk in, just visiting will send you safely to the ground. Super one is very fast. It only takes half an hour from China to the United States. By the end of 2 1 century, "Super One" has become the most common means of transportation, and we can travel around the world by it, which is both time-saving and comfortable. I hope everyone will go and sit down!
Famous scientific and technological sayings
1, any scientific conclusion should not be regarded as eternal. -Deng Tuo
The combination of genius and science can produce the greatest effect. Spencer
3. Mathematical science is a natural language. Galileo
Books should obey science, not the other way around. bacon
5. Science is systematic knowledge. Spencer
6. Science is the graveyard of outdated ideas. -unamuno
7. Science itself has great beauty. Scientists engaged in research work are not only technicians but also children. In natural scenery, he seems to be fascinated by fairy tales. Madame Curie
8. What knowledge is the most valuable? The unanimous answer is science. Spencer
Today, science is our way of thinking and our way of life is the highest stage of our human spirit. —— Guo Moruo
10, without science and art, there would be no people and people's lives. Leo Tolstoy
1 1. Learn from all winners and losers. -Sort out the facts in order to draw general rules and conclusions from them. -Darwin
13, all great scientific theories mean a new conquest of the unknown. sirkarl raimund popper
Science itself is poetic. Spencer
15, science is the best antidote to fanaticism and madness. -Adam Smith
16. There is no royal road to science. Only those who are not afraid to climb steep mountain roads can hope to reach the peak of glory. Marx
17, to engage in science and study, we must be "not empty or loose, and be strict to the end", and we must work very strictly all our lives. -Hua
18, various scientific discoveries often have one thing in common, that is, diligence and innovative spirit. -Qian Sanqiang
19. Science is the warmth and happiness in my heart. You make me fearless. Go to hell. Although prisoners rarely see the light of day, you can smash chains and iron bars. Bruno
20. The embryonic form of any science has its dual images: ugliness in the embryo and beauty in the bud. Hugo
2 1. Only by effectively inheriting human knowledge and mastering the world's most advanced scientific and technological knowledge can we advance half a step further and become the most advanced level and first-class scientist. Weinberg
22. Science has no national boundaries, because it belongs to the wealth of all mankind and is the torch to illuminate the world, but scholars belong to the motherland. Pasteur
23. In scientific research, I always pay more attention to the prediction of the final result. -Lu Jiaxi
24. The so-called science, including logic and mathematics, is a function of the times, so is all science, together with its ideals and achievements. mole
25. Science was and is an observation of all possible things. The so-called foresight is the understanding of what is about to happen, and this understanding needs a process. -Leonardo da Vinci
26. Science is a powerful intellectual force dedicated to breaking the mysterious shackles that imprison me. Gorky
27, bold ideas, serious verification. It seems that boldness is still necessary. Of course, boldness should be based on solid work. -Zhao
People need science. Countries that don't develop science will become colonies. -Aurio Curie.
29. Science is the nervous system of our times. Gorky
30. People like to be curious. This is the seed of science. Emerson
3 1, the scientific spirit lies in seeking truth from facts. -Hu Shi
The real legitimate goal of science is nothing more than this: to bring new discoveries and new strength to human life. bacon
33. Progress is the law of life, otherwise people can't be called human beings. -Browning
34. Science and scientific knowledge are always hypothetical: it is speculative knowledge. The scientific method is the method of criticism: the method of finding and eliminating mistakes and serving the truth. sirkarl raimund popper
35. Scientific laws are objective truths and will not be out of date. The way people use these laws and the corresponding design schemes are changing with each passing day. -Wang Zhuxi
36. Science needs a person's whole life. -Zhu Xian
37. Science is the most important, beautiful and needed thing in people's lives. -Chekhov
38. The accumulation of scientific knowledge is a necessary prerequisite for scientific development. As for who will achieve the ultimate success in the end, it may be accidental and lucky. -Tan Jiazhen
For all mankind, there is only one common interest, and that is scientific progress. -Saint-Simon
40. The science and technology system itself is a modern social organization, which must be driven by a modern spiritual principle. The expected scientific and technological production cannot be achieved only by increasing the investment of funds and personnel. -He Jiadong
4 1. Science is a partial analysis of ignorance. Sherlock Holmes
42. Science often succeeds for the last time after thousands of failures. -Xu Teli
43. Think independently, seek truth from facts, persevere and make up diligently. -Zhou Peiyuan
44, science and democracy, they cancelled the differences between man and nature, also cancelled the differences between people. -Wang Anyi
Today, the development of science and technology has become a comprehensive, large-scale and collective undertaking. -Wang
46. Progress is not an event, but a need. Spencer
47. Science has gone through a very tortuous and difficult road. -Qian Sanqiang
48. Science is the crystallization and achievement of human wisdom ... Looking forward to the future of science, mankind will hold high the torch of science and ascend to the heaven of the universe. -Hawking
49. The immortal honor of science lies in that it overcomes people's insecurities in front of themselves and nature through its effect on human mind. -Einstein
50. Scientific things must be constantly studied, carefully experimented, deepened and expanded. Only by tenacious struggle can we achieve brilliant achievements. Chen Jiaer
5 1. The achievements of scientists are the property of all mankind, and science is the most selfless field. Gorky
52, scientific research is to explore the unknown, researchers should not only have a serious, rigorous and strict style of study, but also have the spirit of dare to think, dare to do and dare to rush. Both are indispensable. Zhu Zhaoliang