Everyone has a dream and sails for it. For the dream in my heart, I am determined to stir it with blood and sweat. Once, there was such a dream, let's pursue it together. For the dream in my heart, raise my sail and sail far away.
Hello, classmates! 2 1 century is an era of innovation and rapid development of science and technology. Science is not a magical desert, it is all around us. In our life, as long as we pay attention to observation and try boldly, we are the masters of future technology. The theme of our class meeting today is (). In order for us to form the good habit of loving and learning science from childhood, we can become Little Inventors by using our hands and brains and having whimsy from childhood. Today, let's go into science and technology to understand it. Let science and technology truly become a bridge for human progress!
Let's guess. Are they all scientists and riddles about science?
1) A great physicist, born in Germany, published three physics papers, founded "special relativity" and "general relativity", and 1992 won the Nobel Prize in physics. (Einstein)
2) A great British scientist, the founder of modern natural science, founded binomial theorem and calculus, and discovered the famous gravity. (Newton)
3) A real inventor, born in England, invented the steam engine, and later generations named the power calculation unit of generators and motors after him in memory of him. (Watts)
4) He is also an Englishman, who has made a five-year round-the-world tour. The Origin of Species is his masterpiece. Later, he published his second book, Variation of Animals and Plants at Home, which put forward important points of species variation and heredity, the struggle of living beings and natural selection. (Darwin)
5) Italian physicist, astronomer and philosopher, pioneer of modern experimental science. 1609, he made an astronomical telescope and used it to observe celestial bodies. At the same time, he also found the unevenness on the surface of the moon and drew the first map of the moon himself. (Galileo)
6) A world-famous scientist and inventor, an American, made more than 2,000 inventions in his life, among which the electric light he invented brought people light and made great contributions to the progress of human civilization. (Edison)
Then I will tell you about the science and technology applied in Beijing Olympic Games.
As one of the three concepts of Beijing Olympic Games, "Hi-tech Olympics" was fully displayed at the opening ceremony. The combination of innovative solutions and high technology makes Beijing present a wonderful cultural and visual feast to the world perfectly. The opening ceremony of Beijing Olympic Games adopted the most complicated technical system of previous Olympic Games, and applied a lot of world-class new technologies, involving many fields, including ground lifting stage, fireworks, ground LED system, command system, communication system and so on. Space materials were also applied to the opening ceremony.
Fireworks technology The fireworks technology at the opening ceremony of this Olympic Games is the best in previous Olympic Games. The 29 big footprints symbolizing the Olympic Games' step-by-step approach to Beijing and the "Star Waterfall" flying down from the inner wall of the "Bird's Nest" ... have made many breakthroughs in the fireworks technology of the Beijing Olympic Games. At 20: 03: 55 pm on August 8, the first special fireworks "Footprint" took off from Yongdingmen South, crossed Tiananmen Square, and went north along the central axis of the ancient capital, The Journey to the West, with an average speed of 2 seconds and a duration of 63 seconds. After 29 steps, it reached the "Bird's Nest". The fireworks implementation scheme adopts the patented technology of chamber pressure emission. This technology can fire dozens of projectiles at the same time by controlling the pressure in the bore and the launching height, and can also be adjusted to form different shapes. Its "big footprints" and "smiling faces" are very successful.
Main Torch Technology The main torch tower of this Olympic Games was developed by Nanjing Aerospace Chen Guang, a subsidiary of Aerospace Science and Industry Corporation, and the driving system of the main torch was designed with relevant aerospace technology. According to the feedback information, the control system can automatically adjust the running direction and speed of the equipment. The main torch with a diameter of more than 3m and a stroke of more than 1 1 m has an operation control error of less than 2mm and an accuracy of two ten thousandths. Aerospace Chen Guang science and technology team has made fruitful research results in flame height control device, automatic ignition control method and new high-energy igniter, and carried out high-intensity tests in simulated rainstorm, strong wind and lightning environment. Among them, the flame regulator of combustion tower, long open flame burner, high-energy igniter, rotary burner, etc. , all obtained China National Intellectual Property Administration utility model patents.
Meteorological technology On the 8th, from 20: 00 to 24: 00, a rainstorm cloud belt stubbornly marched from southwest to northeast to Beijing and headed for the "Bird's Nest". The meteorological department continuously fired 1 104 rockets at 2 1 operating points in Beijing from 6: 00 to 23: 39 on the evening of the 8th, and successfully intercepted them outside Beijing. Until the end of the opening ceremony of the 2008 Beijing Olympic Games, there was no rain in the National Stadium "Bird's Nest". The maximum rainfall in the area north of Baoding, Hebei Province, the rainstorm center exceeded 100 mm, and the rainfall in Fangshan was 25 mm. Meteorologists said that this was the largest organized and planned weather modification operation in China, and it was also the first time in the history of the Olympic Games to realize artificial rain suppression at the opening ceremony.
Let's invite _ _ _ students to read his _ _ _.
Cang Kejia said: "Youth is a treasure, and youth is gold; Treasure to be excavated and gold to be smelted. " The best gold digger and metallurgist in life is yourself, grasp life and let your youth play to the extreme! Students, we must have mastered more scientific knowledge through today's class meeting. I hope that through this activity, everyone will cultivate their interest in science and their good qualities of loving science and being brave in innovation. Students, act quickly! Let our future be better!