指南针英文介绍教案资料

Simple compass
Marx had put a compass and printing, the invention of gunpowder is called “is bourgeois （资产阶级） development necessary premise".
Complex compass
guide fish
Through long-term practice people discovered the artificially(人为 地) magnetization method, and thereby made guide fish and a compass.
Now GPS has also been shown to be an import ant civilian communities of interest, and increas ingly wide range of application.
function
Direction
Feng shui
Zheng He’s expeditions
Especially during the Ming Dynasty, Zheng He made expeditions to South-east Asia for seven times, which contributes to the extension and development of seafaring and foreign trade in the world.
compass
What is compass?
The compass was in the earth's magnetic field using magnets made the north-south refers to polarity(对立) a point to instrument.
Influence
sail
culture
capitalism
Our country is the first state of polarity of the magnet refers to find.
The invention of the compass to the world of the Chinese nation, is a great contributions to civilization.
compass
The warring states period The Ming dynasty
The Song dynasty
Main Timeline
Nowadays
polarity SiNa
Early in the warring states period, using magnets to invent the guidebook instrument - polarity SiNa.