chapter 7 end of chapter exercises

Question 1

43. Comparative planetology operates on the idea that the Earth is ______ and so comparing it to other bodies ______ help a lot in understanding it. A) a unique body, doesn’t B) one of a class of other bodies, does

Answer 1

B. one of a class of other bodies, does

Question 2

44. (Two parts) List the 4 Terrestrial planets & 4 Jovian planets.

Answer 2

terrestrial planets 
1. mercury
2. venus
3. earth 
4. mars 
Jahovian planets
1. jupiter
2. saturn 
3. uranus 
4. neptune

Question 3

45. The Jovian planets are _____ in mass and ______ in density.

Answer 3

bigger in mass and large in density

Question 4

46. Which planet(s) in the Solar System has/have rings?

Answer 4

jovian planets

Question 5

47. What are the two largest planets in the solar system?

Answer 5

jupiter and saturn

Question 6

51. What’s the only moon with a thick atmosphere?

Answer 6

titon

Question 7

49. Before Mars was observed to have two small moons, but it was known that Jupiter had four moons, a fictional writer Swift gave Mars two small moons. Is that remarkable or no? Why

Answer 7

it was not remarkable

Question 8

55. (Two parts) Where are most of the rocky asteroids located? Most of the icy asteroids?

Answer 8

rocky asteroids
1. asteroid belt between mars and jupiter
icy asteroids
1. oort cloud, with smaller resevoir beyond neptune called kuiper belt

Question 9

56. Which got hit more (Earth or the Moon)?

Answer 9

earth

Question 10

52. Why doesn’t Ganymede have an atmosphere?

Answer 10

hotter

Question 11

53. What are the 7 moons larger than Pluto?

Answer 11

europa, ganymede, collists, titon, triton and earths moon

Question 12

55. (Two parts) Where are most of the rocky asteroids located? Most of the icy asteroids?

Answer 12

rocky asteroids
1. asteroid belt between mars and jupiter
icy asteroids
1. oort cloud, with smaller reservoir beyond Neptune called kuiper belt

Question 13

57. (Two parts) In terms of cratering density Mercury is most then Mars, Venus, Earth. Order these from youngest to oldest surface. Which Terrestrial planet got hit the most?

Answer 13

earth, venus, mars and mercury

Question 14

58. (Two parts) The northern hemisphere of Mars has less cratering than the southern hemisphere, so which half of Mars has the older surface? Which half got hit more?

Answer 14

souther is older and neither got hit more.