1. Why was Tycho unwilling to accept that the stars are too far away for him to be able to detect their parallaxes?
A. He thought he could measure the angular diameters of stars
B. He assumed the Earth was stationary
C. He knew Saturn was at the same distance as the stars
D. Trick question, he could, in fact, measure stellar parallaxes
3. Which of the following best describes Tycho's model of the solar system?
A. Sun orbits Earth, planets orbit Sun
B. Earth orbits Sun, planets orbit Earth
C. Sun and planets orbit Earth
D. Planets and Earth orbit Sun
Bloom's Level: Remember Figure: 4.12 Section: 4.4
4. Which of the following is one of Kepler's Laws of Planetary Motion?
A. The planet's distance cubed is proportional to its distance squared
B. Acceleration is proportional to unbalanced force
C. An object in motion remains in motion
D. The parabola is a kind of conic section.
Bloom's Level: Understand Section: 4.5
5. The point of closest approach of a planet to the Sun is called the
E. Inferior conjunction
6. Suppose the distance between the two foci of an ellipse is much smaller than the semimajor axis of the ellipse. What can be said about the ellipse?
A. A planet orbiting on that ellipse would have a short orbital period
B. The eccentricity of the ellipse is nearly zero
C. The ellipse is long and skinny
D. The foci are located far from the semimajor axis
10. Suppose a planet has an elliptical orbit. The speed of the planet is 20 km/s when it is at its average distance from the Sun. Which of the following is most likely to be the planet's speed when it is farthest from the Sun?
A. Planets move fastest at perihelion
B. Comets are often in unbound orbits
C. The sun must be at the center of the solar system
D. Planets all must lie in the same orbital plane
E. Planets are in noncircular orbits
Bloom's Level: Analyze Figure: 4.15 Section: 4.5
12. Kepler's Second Law states that
A. A planet moves more rapidly when near the Sun
B. Planets close to the Sun have longer periods than those further away
C. An object in motion remains in motion
D. A planet's mass increases with distance from the Sun
A. The observations of Venusian phases convinced him
B. He knew that the planets were in elliptical orbits
C. It was philosophically pleasing to him
D. There was official pressure to espouse a heliocentric theory
Bloom's Level: Understand Section: 4.3
23. When does retrograde motion of Venus occur in the heliocentric model of the solar system?
A. When Venus passes the Earth
B. When the Earth and Venus are on opposite sides of the Sun
C. When the Earth is nearest the Sun
D. When the Sun and Venus are opposite each other in the sky
30. In which model(s) of the solar system does Venus show a full range of phases from new to full?
A. Both the geocentric and heliocentric
B. Neither the geocentric nor heliocentric
Bloom's Level: Analyze Figure: 4.19 Section: 4.6
31. What was significant about Galileo's discovery of Jupiter's four brightest satellites?
A. It showed that theories that a planet can only have one satellite are wrong
B. It showed that there are some objects that do not orbit the earth
C. It showed that some satellites have atmospheres
D. It showed that Jupiter is the most massive planet
Bloom's Level: Understand Section: 4.6
32. Which of the following did Galileo use to support the heliocentric hypothesis?
A. Prograde motion of the planets
B. Phases of the Moon
C. Phases of Venus
D. Existence of sunspots
33. Jupiter is about 5 AU from the Sun. What is its orbital period?
A. 4 years
B. 8 years
C. 12 years
D. 16 years
Bloom's Level: Apply Section: 4.5
34. Kepler's Third Law can be described in what way?
A. Closer planets take longer to orbit the Sun than planets that are farther away from the Sun.
B. Planets that are farther away from the Sun take less time to orbit the sun than less massive planets, but more time that more massive planets.
C. Planet that are farther away from the Sun take longer to orbit the Sun than planets that are closer to the Sun.
D. The planet's distance from the Sun is independent of its orbital period.