"Letterpress" PPT courseware 2

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"Letterpress" PPT courseware 2

compass

The guide is a pointing instrument that uses the north and south polarities of magnets in the earth's magnetic field.

The earliest guide that appeared was called Sinan. It was made of natural magnets and looked like a spoon. The center of gravity was in the center of the bottom. The chassis was smooth and engraved with twenty-four directions. Use a long spoon to place it on the chassis and use it. Turn it gently with your hand, and when it stops, the long handle will point south.

Later, people invented the artificial magnetization method and created guide tubes and guide tubes, which were more practical.

Do you know Shen Kuo?

Shen Kuo: (1031-1095) Zi Cunzhong, a native of Hangzhou, was a scientist and politician in the Northern Song Dynasty. The representative work "Mengxi Bi Tan" covers astronomy, geography, mathematics, physics, chemistry, biology, medicine, literature, history and other aspects. This book was praised by the famous British scholar Joseph Needham as "the coordinate in the history of Chinese science and technology"

Read the full text and ask students to refer to the notes and pay attention to the pronunciation of the words.

�, thin, lip, and, Yang, Di, Geng,

Instant, Post, Rhyme, Storage, Sticky, Burnt, Zhan

Yu, follow, spin.

Keywords: letterpress courseware PPT, Jiangsu Education Edition eighth grade Chinese PPT courseware download, eighth grade Chinese slide courseware download, letterpress PPT courseware download, .PPT format

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"Letter Type" PPT Courseware 3:

"Mobile Version" PPT Courseware 3 Shen Kuo (10311095), courtesy name Cunzhong, was born in Qiantang (now Hangzhou, Zhejiang) and was a famous scientist, politician and military strategist in the Northern Song Dynasty. He has made outstanding contributions in astronomy and physics. In his later years, Shen Kuo settled in Runzhou (now Jiangsu...

"Letter Type" PPT courseware:

"Letterpress" PPT courseware In "Cihai", printing is introduced as follows: my country is the first country to invent printing. The early printing method was to engrave pictures and texts on wooden boards and print them with ink, which was called block printing. Stereotype printing became popular in the Tang Dynasty of my country..

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Update Time: 2024-11-18

This template belongs to Chinese courseware Jiangsu Education Edition Chinese Language for Eighth Grade Volume 2 industry PPT template

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