Chapter 4 Homework

Chapter 4 Homework - Chapter 4(Note Some questions from an...

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Chapter 4 (Note: Some questions from an original list have been deleted; don’t be concerned about the missing questions for this class. This note also applies to future chapters.) Fill in the Blank 1. The two planets with the highest eccentricities and orbital tilts are Mercury and Pluto . 2. Asteroids and meteoroids are often rocky in composition, in contrast to comets, which are generally icy in composition. 3. Most asteroids are found between the orbits of Mars and Jupiter . 5. The Trojan asteroids share an orbit with Jupiter . 7. Passage of a comet near the Sun may leave a tail moving in the comet’s orbit. 8. When a meteoroid, asteroid, or comet fragment enters Earth’s atmosphere, you see a Meteoroid Swarm . 9. The oldest meteorites are 4.6 Billion years old. 10. By the time planetesimals had formed, the accretion process was accelerated by the effect of Gravity . 11. In the final stage of accretion, the largest protoplanets were able to attract large quantities of Gas from the solar nebula. 12. Unlike the planetesimals that formed the terrestrial planets, those that formed the jovian planets were made up of icy material. 14. The reason the planetesimals of the asteroid belt did not form a larger object was probably the gravitational influence of Jupiter . Discussion Questions 1. Name three differences between terrestrial and jovian planets. Location Size Density 2. Why are asteroids and meteoroids important to planetary scientists? Because they change little over time. 3. Do all asteroid orbits lie between Mars and Jupiter? No. There are also Earth Crossing Asteroids. 5. What are comets like when they are far from the Sun? What happens when they enter the inner solar system? When comets are far from the sun, they don’t have a tail. When they get close to the sun a tail and a coma are formed. 6. What are the typical ingredients of a comet nucleus?
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This homework help was uploaded on 04/02/2008 for the course ASTR 101 taught by Professor Caffo during the Fall '06 term at New Mexico.

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Chapter 4 Homework - Chapter 4(Note Some questions from an...

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