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"Zhang Heng and His Seismometer" PPT Courseware 3
learning target
1. Learn the new words in this lesson and be able to correctly read and write words composed of new words.
2. Understand the content of the text, understand the structure of the seismometer, and enhance national pride.
3. Be able to introduce the seismograph designed and manufactured by Zhang Heng in your own words.
Introduction before class
With the continuous development of science and technology and the continuous improvement of observation levels, my country's National Seismological Bureau can accurately and timely conduct earthquake predictions, reduce earthquake disasters to a minimum, and ensure the safety of people's lives and property. But how did people predict earthquakes in ancient times?
This section introduces the shape and function of the seismometer designed by Zhang Heng.
That day, a copper ball fell from the dragon's mouth facing west, so Zhang Heng concluded that there was an earthquake in the west of Kyoto.
More than 1,800 years ago, Zhang Heng was able to create such an exquisite, sensitive, accurate and beautiful instrument. It is really amazing!
Extended summary
After years of exploration, Zhang Heng developed the world's first instrument for measuring earthquakes. I hope that students will study hard, learn science, use science, and become inventors to benefit mankind.
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