Which of the following is true of Copernicus's model of the Universe?
A) Each planet was treated differently.
B) Earth was considered to be at the center.
C) Each planet followed orbits that circled the Sun at the center.
D) The positions of the planets were predicted accurately.
Question 2The moons of Jupiter supported the__________of the Universe over the Ptolemaic model.
A) Newtonian model
B) Galilean model
C) Copernican model
D) Kepler model
Question 3Which of the following was believed by Aristotle as a first principle?
A) Earth was flat.
B) The heavens were perfect.
C) The Sun was at the center of the Universe.
D) Heavenly objects moved in a circular path at varying speeds.
Question 4A(n) ____ is one in which an object orbiting Earth has an orbital period equal to the rotation period of Earth.
A) epicyclical orbit
B) open orbit
C) geosynchronous orbit
D) heliocentric orbit
Question 5Which of the following is true of Claudius Ptolemy?
A) He was interested in philosophical rather than practical questions about the Universe.
B) For him, first principles took second place to accuracy.
C) He believed that Earth was at the exact center of the Universe.
D) He disagreed completely with Aristotle's ideas of the Universe.
Question 6The velocity needed to stay in a round orbit is called the__________.
A) circular velocity
B) linear velocity
C) vertical velocity
D) horizontal velocity
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