用塑料尺子摩擦几下头发,为什么可以吸附小纸片?筷子插到盛有水的碗里,为什么像是被折断了一样?乘做公交车时,如果车子突然停下,人为什么会向前倾?同学们,你们有没有注意到生活中的这些琳琅满目的“怪现象”?
其实,在这些“怪现象”背后,隐藏着各种各样的科学原理。比如,塑料尺子可以吸附小纸片是因为尺子和头发摩擦后产生了静电,筷子在水里变弯曲是因为光的折射作用,而人在紧急刹车时向前倾则是由于惯性的作用……
神秘的科学殿堂引发人类五彩斑斓的设想,而五彩斑斓的设想又助推了人类的前行。历史上,许多看似不经意的小发明、小设计,却创造出一个又一个神奇,改变和丰富着我们的生活,就像英格兰的牧羊人发明了铅笔,匈牙利记者生产了第一支商品化的圆珠笔……
体验科学、快乐成长。同学们,让我们掌握更多的科学知识、科学思想和科学方法,培养不断探索的科学精神和求真创新的科学意识,从小爱科学、学科学、用科学,努力成长为国家科技事业的“希望之星。”
方雅:Rub hair a few times with plastic ruler, why can you absorb small paper? Why do chopsticks seem to be broken when they are inserted into a bowl of water? When taking a bus, if the bus stops suddenly, why do people lean forward? Students, have you noticed these dazzling "strange phenomena" in your life? \n In fact, behind these "strange phenomena", there are various scientific principles. For example, plastic rulers can absorb small pieces of paper because of the static electricity generated by the friction between the ruler and the hair.Chopsticks bend in water because of the refraction of light, while people lean forward in emergency braking because of inertia.. \n The mysterious palace of science has triggered the colorful imagination of human beings, and the colorful imagination has boosted the progress of human beings. In history, many seemingly inadvertent small inventions and designs have created one after another magic, changing and enriching our lives, just as shepherds in England invented pencils and Hungarian journalists produced the first commercialized ballpoint pen.. \n Experience science and grow happily. Students, let us master more scientific knowledge, scientific ideas and scientific methods, cultivate the scientific spirit of continuous exploration and the scientific consciousness of seeking truth and innovation, love science, learn science and use science from childhood, and strive to grow into the "star of hope" of national science and technology.
当方雅念完以后,大家先是安静了一片,然后发出了轰烈的掌声。
就这样大赛最后,吴方雅代表我校出战。
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