Chapter 11, Problem 36EAP

Choose the best answer to each of the following- Explain your reasoning with one or more complete sentences.

1. Which lists the jovian planets in order of increasing distance from the Sun? (a) Jupiter. Saturn, Uranus. Pluto fb) Saturn, Jupiter, Uranus, Neptune (c) Jupiter, Saturn, Uranus, Neptune
2. Why does Neptune appear blue and Jupiter red? (a] Neptune is hotter, which gives bluer thermal emission, (b) Methane in Neptune’s atmosphere absorbs red light, (cj Neptune's air molecules scatter blue light, much as Earth's atmosphere does.
3. Why is Jupiter denser than Saturn? (a) It has a larger proper tion of rock and metal, (b) It has a larger proportion of hydrogen. (c) Its higher mass and gravity compress its interior.
4. Some jovian planets give off more energy than they receive because of (a) fusion in their cores, (b) tidal heating, (c) ongoing contraction or differentiation.
5. The main ingredients of most satellites of the jovian planets are (a) rock and metal, (b) hydrogen compound ices, (c) hydrogen and helium.
6. Why is lo more volcanically active than our moon? (a) Io is much larger, fb) lo has a higher concentrauon of radioactive elements, (c) Io has a different internal heat source.
7. What is unusual about Triton? (a) It orbits its planet backward. (bj It does not keep the same face toward its planet, (c) It is the only moon with its own rings.
8. Which moon shows evidence of rainfall ami erosion by some liquid substance? (a) Europa (b) Titan (c) Ganymede
9. Saturn's many moons affect its rings through (a) tidal forces, (b) orbital resonances, (cj magnetic field interactions.
10. Saturn's rings la) have looked basically the same since they formed along with Saturn, (b) were created long ago when tidal forces tore apart a large moon, (c) are continually supplied with new particles by impacts with small moons.