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Chapter 12

Study Guide

Study Guide

This activity contains 10 questions.

	The rings of Saturn are most likely characterized by which of the following statements?   They are several hundred kilometers thick. They are the result of an early collision of Saturn with Jupiter. They are a continuous solid sheet of reflective ice. They are relatively young compared to the age of Saturn and the solar system. They are made of hydrogen and helium gas.

	Mimas is a moon of Saturn with which of the following characteristics?   Flow features caused by surface remelting and internal tectonic forces Sulfur volcanoes and a plasma torus due to tidal heating A heavy set of ridges due to cooling and resulting surface compression Dark and light areas from collection of dust on its leading edge as it travels through space A very large impact crater and a role in maintaining one of Saturn's rings

	Saturn's moon Iapetus has a surface that shows which of the following features?   Sulfur volcanoes A thick atmosphere Evidence of flowing water Two-tone markings An extremely large crater

	In what way do the two small moons, Janus and Epimetheus, share an orbit around Saturn?   They play "tag," alternately catching up with and passing each other, then trading places in terms of speed and distance to Saturn. They orbit 60° apart from one another in "Lagrange points" at the same orbital distance from Saturn. They do not actually share an orbit, but have completely separate orbits at different distances from Saturn. They orbit just inside and just outside of one of Saturn's "braided" rings. They undergo a chaotic tumbling rotation between the orbits of Titan and Iapetus, with unpredictable rotation direction and rate.

	Saturn has an average density of about   that of water. 1.4 times that of water. 5 times that of water. 0.7 times that of water. 0.5 times that of water.

	Discounting ring particles, Saturn still has many moons. The number of moons of Saturn is approximately   20. 40. 31. 10. 5.

	The total radiation coming from Saturn is   more than what it receives from the Sun. extremely variable. less than what it receives from the Sun. equal to what it receives from the Sun.

	The rings of Saturn revolve in the plane of   none of these (at some other angle). the ecliptic. the Milky Way. Saturn's orbit. Saturn's equator.

	Roche's limit refers to that distance from a planet where   tidal stability limit is found. the innermost ring is found. the innermost moon is found. co-orbital moons are found. the atmosphere ends.

	If all of Saturn's ring material could be collected into a single object, it would have a diameter of about   25 km. 2500 km. 2.5 km. 250 km. 25,000 km.

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