Listen to part of a lecture in a history of science class.
- What is the purpose of the lecture?
- A. To explain how the heliocentric theory of the universe developed.
- B. To give an example of the persistence of traditional theories
- C. To show that scientific knowledge is rarely influenced by philosophy.
- D. To compare methods in observational and theoretical astronomy.
- Why did the ancient Greeks hold geocentric view of the universe?
[CHOOSE 2 ANSWERS]
- A. The sun appeared to them to revolve around Earth.
- B. They had not developed methods of gathering accurate data on the movement of planets.
- C. Their religious and philosophical beliefs supported this view.
- D. Some of the planets in the solar system had not been discovered yet.
- Why does the professor point out that Greek astronomers tried to explain new astronomical discoveries within the geocentric concept?
- A. To explain why early astronomers found new discoveries exciting.
- B. To explain why some claims made by ancient Greek astronomers conflict with claims made by earlier astronomers.
- C. To illustrate that the geocentric concept was open to many interpretations.
- D. To illustrate that the geocentric concept itself was not considered questionable.
- Why does the professor discuss the epicycle theory?
- A. To explain why early astronomers started measuring the velocity of the planets.
- B. To explain why the astronomer Aristarchus rejected the geocentric model.
- C. To show how explained the apparent backward motion of some planets.
- D. To show that early astronomers believed that all planets moved in their own orbits around the sun.
- In the professor’s view, what might have caused Aristarchus to propose the heliocentric theory?
- A. The discovery that Earth was much smaller than the sun.
- B. The lack of proof supporting the theory of epicycles.
- C. The influence of well-known philosophers.
- D. The apparent stability of Earth.
- What were two arguments ancient Greeks used to reject the heliocentric model?
[CHOOSE 2 ANSWERS]
- A. More stars would be visible in a heliocentric universe.
- B. A moving Earth would create a strong wind.
- C. Aristarchus’s calculations were inaccurate.
- D. Objects fall toward the center of the universe.
B AC D C A BD