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Authoritative PPT Summary
"Zhang Heng and His Seismograph" PPT courseware
I know
Zhang Heng was an astronomer, mathematician, writer and artist during the Eastern Han Dynasty. In addition to the seismograph, he also created the "armillary sphere" which accurately demonstrated the position of stars in the sky. He was also the first person in the world to correctly explain the phenomenon of lunar eclipses.
What do you know?
1. In 138 AD, news came from Zhang Heng: "An earthquake has occurred west of Kyoto!"
2. After years of exploration, Zhang Heng made the world's first instrument for measuring earthquakes, called a "seismograph" in 132 AD.
3. The seismometer is made of copper, eight feet in diameter and looks like a big wine jar.
Self-study outline:
Why did Zhang Heng invent the seismograph?
What does a seismograph do?
Study text:
1. Who is the text mainly about? When was he from?
(Zhang Heng, a native of Eastern Han Dynasty, my country.)
2. Who is Zhang Heng? What important thing did he do?
(Zhang Heng was an outstanding scientist who invented the seismometer.)
Read paragraphs 2, 3, and 4 silently and answer the following questions:
When Zhang Heng said, "There was an earthquake west of Kyoto," did people believe it? What changed later? Why?
The structure of the seismometer
The seismometer is made of copper, eight feet in diameter and looks like a big wine jar. On the outer wall of this "big wine jar", eight dragons hang upside down. The heads of the eight dragons face the eight directions of east, south, west, north, southeast, southwest, northeast and northwest respectively. Each dragon has a copper ball in its mouth. Under each faucet, squatting is a copper toad. The toad raised its head and opened its mouth.
The function of seismometer
When an earthquake occurs in which direction, the dragon's mouth facing that direction opens, and the copper ball in the dragon's mouth falls down. With a clang, it falls right into the mouth of the copper toad facing it. When the watchers heard the noise, they knew which direction the earthquake was coming from.
What is the function of the seismometer invented by Zhang Heng? Who can tell? Can you put it in this sentence?
If an earthquake occurs in the direction ( ), the dragon facing ( ) will have its mouth ( ) and the copper ball ( ). The copper ball ( ) landed right in ( )'s mouth. When people listen, they know which direction the earthquake occurred.
During the Eastern Han Dynasty, there was a great scientist named Zhang Heng.
What other word can be used to replace "great"?
famous, excellent
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"Zhang Heng and His Seismometer" PPT Courseware 4:
"Zhang Heng and His Seismometer" PPT Courseware 4 Introduction to Zhang Heng, a Chinese scientist from the Eastern Han Dynasty. 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. Yongyuan twelve...
"Zhang Heng and His Seismometer" 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 Seismometer" 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...