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"Zhang Heng and His Seismograph" PPT Courseware 4
Introduction to Zhang Heng
Scientist of the Eastern Han Dynasty of China. The word is Pingzi. A native of Nanyang Xi'e (now Shiqiao Town, Nanyang County, Henan Province). He studied hard at home in his early years. At the age of 17, he traveled to Chang'an and Luoyang, visited Imperial College, and sought teachers and friends. In the twelfth year of Yongyuan (100), he served as the chief administrator of Nanyang Prefecture. In the fifth year of Yongchu (111), he went to Kyoto to serve as a doctor and a minister, and served as Taishi Ling twice. In his later years, he served as prime minister of Hejian and minister. in astronomy,
Great achievements
He has high attainments in astronomy, seismology, machinery manufacturing, mathematics, literature, painting, etc.
In terms of astronomy, his representative works are "Illustrated Notes on the Armillary Sphere" and "Lingxian". It advocates the theory of Hun Tian, which states that the sky is like an egg, and the earth is in the center like the yolk in the egg. The sky and the earth stand on the basis of Qi and float on water. Although he advocates that the sky has a hard shell, he also advocates that "the surface of the universe is infinite, and the end of the universe is infinite." He believes that there is a sky outside the sky and the universe is infinite. He proposed a theory of the origin of heaven and earth with simple dialectics. He believed that before the heaven and earth were divided, there was chaos. Later, the vitality separated, the heaven and earth were generated, and all things were nourished.
Correctly explained the cause of lunar eclipses, believing that lunar eclipses are caused by the moon entering the earth's shadow. It is proposed that "near the sky will be slow, and far away will be fast", and use the difference in distance to explain the speed of the movement of the five stars. He estimated that the number of stars visible to the naked eye in the Central Plains was about 2,500, and determined that the viewing angle diameter of the sun and moon was 1/736 (about 0°.49) of the sky, which was very close to the actual situation. He designed and manufactured the first water-borne Huxiang, which used water as power to push the Huxixiang body to rotate once a day through a gear system. The appearance of the stars displayed on the Hunyxiang was completely consistent with the actual celestial phenomena.
think
1. How many times are wind seismometers evaluated in the text? Please find the sentences evaluated in the article and analyze their differences.
2. How do scientists get inspiration from ancient books? How many ways are there to explain ancient books in the text? If you do not quote ancient texts and use modern language to explain everything, what difference will the effect be?
3. The article explains in detail how scientists study the placement of pillars in the Houfeng seismograph, and summarizes it into two assumptions. What is the role of analyzing the working principle of the seismometer?
4. The text compares Zhang Heng and his instruments with foreigners and foreign instruments many times. Why does the author write this?
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"Zhang Heng and His Seismograph" PPT courseware 3:
"Zhang Heng and His Seismometer" PPT Courseware 3 Learning Objectives 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. Can introduce the products designed and manufactured by Zhang Heng in your own words.
"Zhang Heng and His Seismograph" PPT Courseware 2:
"Zhang Heng and His Seismograph" PPT Courseware 2 1. Review Introduction Proficient Perception Debate Shocked Sensitive 1. Who is the text mainly about? When was he from? (Zhang Heng, a native of the Eastern Han Dynasty in my country.) 2. Who is Zhang Heng? He did something heavy...
"Zhang Heng and His Seismometer" PPT courseware:
"Zhang Heng and His Seismograph" PPT courseware I know Zhang Heng, an astronomer, mathematician, writer and artist during the Eastern Han Dynasty. In addition to the seismograph, he also created an armillary sphere that accurately demonstrated the position of stars in the sky. He was also the first person in the world to correctly explain the moon...