Exam 3 Study Guide

Exam 3 Study Guide - ASTRONOMY 180 INTRODUCTORY ASTRONOMY...

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ASTRONOMY 180 INTRODUCTORY ASTRONOMY STUDY GUIDE--EXAM # 3 FALL 2007 1. What is the proposed interior structure of Jupiter and Saturn? A rocky core, an icy/slushy layer, (Jupiter – metallic hydrogen), a layer of molecular hydrogen 2. What causes the magnetic fields of Jupiter and Saturn? Their metallic hydrogen layer 3. What is unique about Io? What causes this unique activity? Io has active volcanoes on its surface caused by the gravitational pulls by 3 moons and Jupiter causing friction; it has no impact craters 4. How are Europa, Ganymede, and Callisto different from one another? Europa has a water ice surface that is young and broken up and liquid under the crust, Ganymede has a thin atmosphere of O 2 and an active magnetic field, ice with rocky core; callisto is icy with a rocky core and a heavily cratered surface 5. What do the Galileo images suggest about what lies below Europa’s icy crust? The images suggest that there is liquid water under Europa’s crust 6. What is the largest moon in the solar system? Ganymede 7. Which planets have rings? All of the Jovian planets (Jupiter, Saturn, Uranus, Neptune) 8. What are the two ways in which ring systems form? Which model explains the rings around Saturn? Which model explains the thin rings found around other planets? Meteorite bombardment of icy moons, Saturn; 9. What is the composition of Saturn’s rings? Ice particles, and ice-coated rocks as well as traces or organic molecules 10. Which planet has a density less than that of water? Saturn 11. How does the composition of the icy moons help explain the cracks on their surfaces? How does this process differ from that producing the scarps on Mercury? The liquid under the icy crust leaks through crater impacts 12. What is interesting about Enceladus? It has tiger stripes and geysers 13. Why is Titan unusual among moons? It has a thick, opaque atmosphere rich in nitrogen, methane, and other hydrocarbons 14. What have the Huygens lander and the Cassini orbiter revealed about the geology of Titan? A lack of craters suggesting that Titan undergoes dynamic change 15. What was the first planet to be discovered? Uranus 16. In what ways is Uranus different from the other Jovian planets? We look at it from a pole position because it rotates on its heavily tilted axis 17. How do Uranus and Neptune differ in composition and interior structure from Jupiter and Saturn? They have a rocky core, a layer of highly compressed water, and a liquid hydrogen and helium outer layer 18. What is so strange about the magnetic fields of Uranus and Neptune? Their magnetic fields are steeply offset from the centers of the planets and steeply inclined to their rotation axes 19. Where are the magnetic fields of Uranus and Neptune proposed to originate?
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Exam 3 Study Guide - ASTRONOMY 180 INTRODUCTORY ASTRONOMY...

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