Chapter 8 B

Which statement about Io is true?

Using the data in the table Satellites of the Solar System, identify the orbital resonance relationship between Titan and Hyperion. (Hint: If the orbital period of one were 1.5 times the other, we would say that they are in a 3:2 resonance.)

Which medium-size moon is in a 2:1 resonance with Enceladus?

Io is shown in the figure below. (Left: approximate colors of Io in visible light; black spots are volcanoes that are still active or have recently gone inactive. Right: infrared thermal emission from Io; the bright spots are active volcanoes.) 1. What do the colors represent in the right image? 2. Which color in the right image indicates regions with the highest temperature? 3. The right image was obtained when only part of Io was in sunlight.Based on the colors, which part of the surface was in sunlight? 4. By comparing the two images, what can you conclude about Io's volcanoes?

What is the ratio of Titan's mass to that of all the other satellites of Saturn whose masses are listed in Appendix E?

Calculate the strength of gravity on Titan compared to that on Mimas.

Compare the satellites' ability to retain an atmosphere.

The two jovian planets that contain the highest proportions of hydrogen compounds are ___________.

Match the words at the left to the correct blanks in the sentences at right.

Which of the following best describes the nature of planetary rings?

Which moon is considered likely to have a deep, subsurface ocean of liquid water?

Io experiences tidal heating primarily because __________.

As you saw in Part A, Io's elliptical orbit is necessary to its tidal heating. This elliptical orbit, in turn, is a result of the orbital resonance among Io, Europa, and Ganymede. This orbital resonance causes Io to have a more elliptical orbit than it would otherwise, because __________.

We cannot see tidal forces or tidal heating; rather, we predict that they must occur based on the orbital characteristics of the moons. What observational evidence confirms that tidal heating is important on Io?

Orbital resonance also gives Europa an elliptical orbit, so it experiences tidal heating, too. However, Europa experiences less tidal heating than Io, because Europa __________ than Io.

We now know of many Jupiter-size planets around other stars. Suppose that future observations show that one of these planets has two orbiting moons. What additional information, if any, would we need to decide whether these moons experience tidal heating?

The main ingredients of most satellites of the jovian planets are

Which moon has a thick atmosphere made mostly of nitrogen?

Suppose you could float in space just a few meters above Saturn's rings. What would you see as you looked down on the rings?

Which of the following statements about the moons of the jovian planets is NOT true?

Why is Io more volcanically active than our moon?

Saturn's many moons affect its rings through

Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column. Use each word only once.

Saturn's rings

What is unusual about Triton?

Listed following are some of the distinguishing characteristics of the four Galilean moons of Jupiter. Match each characteristic to the appropriate moon.

Saturn's rings are composed of __________.

Saturn's rings look bright because __________.

Which of the following statements correctly describes the motion of the particles in Saturn's rings?

Which moon shows evidence of rainfall and erosion by some liquid substance?