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Chapter 6

Study Guide

Study Guide

This activity contains 10 questions.

	Which of the following is not a way in which the terrestrial and jovian planets differ?   The terrestrial planets that do have atmospheres have ones made of heavier compounds in general than the atmospheres of the jovian planets. The jovian planets have orbits that are highly inclined to the ecliptic and do not revolve in the same direction as the terrestrial planets. The terrestrial worlds have few or no moons, while the jovian worlds have many moons. The orbits of the terrestrial worlds are relatively close together, while the orbits of the jovian worlds are far apart. The terrestrial worlds are small and dense, while the jovian worlds are large and gaseous.

	What three planets have retrograde rotations about their axes?   Mars, Pluto, and Mercury Saturn, Uranus, and Neptune Mercury, Venus, and Neptune Jupiter, Mars, and Venus Venus, Uranus, and Pluto

	How long does it take for light from the Sun to reach the orbit of Pluto, roughly 40 astronomical units away?   223 hours 2.5 minutes 13 seconds 1.3 hours 5.6 hours

	Which of the following is not a characteristic of terrestrial planets?   Smaller radii than those of jovian planets Weaker magnetic fields than those of jovian planets Slower rotation than that of jovian planets Closer to the Sun than are jovian planets Lower density than that of jovian planets

	Where in the solar system does the asteroid belt lie?   Between the orbits of Mars and Jupiter Between the orbits of Venus and Earth Between the orbits of Jupiter and Saturn Between the orbits of Earth and Mars None of the positions listed here is correct.

	Which of the orbits of the solar system planets have the largest tilts with respect to the ecliptic plane?   Mars and Neptune (4 degrees and 6 degrees, respectively) Mercury and Venus (3 degrees and 7 degrees, respectively) Mercury and Pluto (7 degrees and 17 degrees, respectively) Earth and Jupiter (1 degree and 5 degrees, respectively) The orbits of the planets are randomly oriented with respect to the ecliptic, and have no observable pattern.

	Which of the planets listed below has the highest mass?   Earth Pluto Neptune Uranus Saturn

	Which of the following is the only spacecraft to have visited four planets in the solar system (so far)?   Cassini Voyager 2 Mariner 4 Voyager 1 Magellan

	What fraction of the total mass of the solar system is contained in the Sun itself?   99.9 percent 98.0 percent 92.3 percent 89.7 percent 95.6 percent

	Which of the planets listed below has the lowest mass?   Venus Mercury Neptune Earth Mars

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