Why is it believed that the rings of Saturn could not have formed just as the planet itself formed?
a. Over time the solar wind should have blown away the particles in the rings.
b. The particles in the rings should fall into the planet in a short period of time.
c. The rings are made of ice particles which would have been vaporized by the heat released as Saturn formed.
d. The outer planets do not have enough mass to hold on to the rings.
Question 2What causes the geological activity seen on some of the inner moons of Jupiter?
a. Constant collisions with space debris provide a power source for geological activity.
b. The strong magnetic field of Jupiter heats the surface of the inner moons.
c. Tidal friction as a result of being so close Jupiter heats their interiors.
d. Solar radiation reflected of Jupiter's surface provides a power source for geological activity.
Question 3Pluto's density is 1.8 g/cm3 . Iron is about 5 g/cm3 . Rock is about 3 g/cm3 . Ice or water is 1.0 g/cm3 . This implies that
a. Pluto has a large iron-nickel core.
b. Pluto is about 35 water ice and 65 rocky material.
c. Pluto is all rock.
d. Pluto is all water or water ice.
Question 4Saturn's F ring and the rings of Uranus are similar in that
a. they are made of dark material.
b. they are made of icy material.
c. they are found near large moons.
d. they show well-defined spokes.
e. they are very narrow.
Question 5Saturn's rings are
a. composed of ice particles.
b. in the plane of the planet's equator.
c. within the planet's Roche limit.
d. composed of ice particles, in the plane of the planet's equator, and are within the planet's Roche limit.
e. None of the other choices are correct.
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