Question 1 Which of the following is a general characteristic of the four jovian planets in our solar system? a. They have very little hydrogen, helium, and hydrogen compounds. b. They have solid surfaces. c. They are less massive then any of the terrestrial planets. d. They are lower in average density than are the terrestrial planets. Question 2 Which of the following best describes the internal layering of Jupiter, from the center outward? a. core of rock, metal, and hydrogen compounds; thick layer of metallic hydrogen; layer of liquid hydrogen; layer of gaseous hydrogen; cloud layer b. liquid core of hydrogen compounds; liquid hydrogen layer; metallic hydrogen layer; gaseous hydrogen layer; cloud layer c. core of rock and metal; mantle of lower density rock; upper layer of gaseous hydrogen; cloud layer d. solid rock core; layer of solid metallic hydrogen; layer of pure liquid hydrogen; cloud layer Question 3 Overall, Jupiter's composition is most like that of _________. a. Earth b. the Sun c. a comet d. an asteroid Question 4 How do typical wind speeds in Jupiter's atmosphere compare to typical wind speeds on Earth? a. They are about the same as average winds on Earth. b. They are slightly faster than average winds on Earth. c. They are much faster than hurricane winds on Earth. d. They are slightly slower than average winds on Earth. Question 5 What atmospheric constituent is responsible for the blue color of Uranus and Neptune? a. water b. methane c. ammonia d. hydrogen Question 6 Which of the following statements about the moons of the jovian planets is NOT true? a. One of the moons has a thick atmosphere. b. Some of the moons are big enough that we'd call them planets (or dwarf planets) if they orbited the Sun. c. Many of the moons are made largely of ices. d. Most of the moons are large enough to be spherical in shape, but a few have the more potato-like shapes of asteroids. Question 7 Which statement about Io is true? a. It is the most volcanically active body in our solar system. b. It is thought to have a deep, subsurface ocean of liquid water. c. It is the largest moon in the solar system. d. It is the only moon in the solar system with a thick atmosphere. Question 8 Which moon has a thick atmosphere made mostly of nitrogen? a. Europa b. Ganymede c. Titan d. Triton Question 9 Which moon is considered likely to have a deep, subsurface ocean of liquid water? a. Europa b. Miranda c. Io d. Triton Question 10 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? a. countless icy particles, ranging in size from dust grains to large boulders b. dozens of large "moonlets" made of metal and rock, each a few kilometers across c. Nothing—up close, the rings would be so completely invisible that you'd have no way to know they are there. They can be seen only from a distance. d. a solid, shiny surface, looking much like a piece of a DVD but a lot bigger Question 11 Why is Neptune denser than Saturn? a. The extra mass of Neptune compresses its interior to a greater extent than that of Saturn. b. Its hydrogen is molecular, whereas Saturn's hydrogen is atomic. c. It has a different composition than Saturn, including a higher proportion of hydrogen compounds and rocks. d. It has a greater proportion of hydrogen than Saturn. e. It is not denser than Saturn. Question 12 What is the most important reason why an icy moon is more likely to be geologically active than a rocky moon of the same size? a. Ice is less dense than rock. b. Ice is less rigid than rock. c. Ice contains more radioactive elements than rock. d. Ice has a lower melting point than rock. e. Ice is affected by tidal forces to a greater extent than rock. Question 13 Why is Saturn almost as big as Jupiter, despite its smaller mass? a. Saturn's rings make the planet look bigger. b. Jupiter's strong magnetic field constrains its size. c. Jupiter's greater mass compresses it more, thus increasing its density. d. Saturn has a larger proportion of hydrogen and helium than Jupiter, and is therefore less dense. e. Saturn is further from the Sun, thus cooler, and therefore less compact. Question 14 Which lists the jovian planets in order of increasing distance from the Sun? a. Jupiter, Saturn, Uranus, Neptune b. Saturn, Jupiter, Uranus, Neptune c. Jupiter, Saturn, Uranus, Pluto Question 15 What is unusual about Triton? a. It is the only moon with its own rings. b. It does not keep the same face toward its planet. c. It orbits its planet backward.