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必修5《Using LanguageⅠ》优质课PPT课件下载
COPERNICUS’ REVOLUTIONARY THEORY
Copernicus
Brief introduction
We know Copernicus was a devoted (虔诚的）Christian and one of the first scientists to use mathematical observations to collect information. He believed the sun is the center of the universe and the earth and other planets went around it. His book The Revolutions Of Heavenly Bodies 《天体运行论》has a far-reaching(深远的）influence on the development of science
Before Copernicus’ theory
Showing Copernicus’ theory
Task1 Use the reading passage to help you draw the two theories of the universe.
Why could he not tell about his theory?
What was his theory about?
3. What had the astronomers noticed in the sky?
4. How did he explain changes in the movement of the planets and in the brightness of the stars?
5. When did Copernicus publish his theory?
Task 2 Answer these questions.
Before Copernicus’ theory
Showing Copernicus’ theory
The Earth was stationary at the center of the solar system, and the Sun and planets revolved around it.
The Sun is stationary at the center of the solar system, and the Earth and the other planets orbit around it.
Because the powerful Christian Church would have punished him for even suggesting such an idea.
1. Why could he not tell about his theory?
Task 2 Answer these questions.
2. What was his theory about?
All his mathematical calculations led to the same conclusion: that the earth was not the centre of the solar system. Only if you put the sun there did the movements of the other planets in the sky make sense.
3. What had the astronomers noticed in the sky?
They had noticed that some planets in the sky seemed to stop, move backward and then go forward in a loop. Others appeared brighter at times and less bright at others.
4. How did he explain changes in the movement of the planets and in the brightness of the stars?