S6. Which is the densest planet in the solar system? A) Mercury B) Venus C) Eart
ID: 1775137 • Letter: S
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S6. Which is the densest planet in the solar system? A) Mercury B) Venus C) Earth D) Mars E) Jupiter 57·In what part of the solar system is Pluto found? A) the asteroid belt 8) the Kuiper belt C) the Oort cloud D) the terrestrial planet region 58. What can we conclude from the fact that Neptune's large moon Triton orbits in a direction opposite to the direction in which Neptune rotates? A) Triton must be made mostly of ice. B) Triton must have formed as the result of a giant impact. C) Triton must have been captured by Neptune. D) Triton must have formed in place around Neptune. E) Triton must be more dense than Neptune. 59. Why did the solar nebula heat up as it collapsed? A) Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula. B) As the cloud shrank, its gravitational potential energy was converted to thermal energy C) Radiation from other nearby stars that had formed earlier heated the nebula. D) The shock wave from a nearby supernova heated the gas E) As the cloud shrank, its kinetic energy was converted to gravitational potential energy 60. Why did the solar nebula flatten into a disk? A) The interstellar cloud from which the solar nebula formed was originally somewhat flat. B) The force of gravity pulled the material downward into a filat disk. C) As the nebula cooled, the gas and dust settled onto a disk. D] It flattened as a natural consequence of collisions between particles in the nebula, changing random motions into more orderly 61. A) Mercury, Venus, Earth, Moon, Mars B) Mercury, Moon, Venus, Earth, Mars C) Moon, Mercury, Venus, Earth, Mars D) Moon, Mercury, Mars, Venus, Earth E) Mercury, Moon, Mars, Earth, Venus 62. Under what circumstances can differentiation occur in a planet? A) The planet must have a rocky surface. B) The planet must be made of both metal and rock C) The planet must have an atmosphere o) The planet must be geologically active, that is, have volcanoes, planetquakes, and erosion from weather E) The planet must have a molten interior. 63. The core, montle, and crust of a planet primarily have differences in their Al geological activity B) color C) strength D) density.Explanation / Answer
56
C)Earth
57)
B)Kuiper Belt
58)C
Triton must have been captured by Neptune
59)B
As the cloud shrank, its gravitational potential energy was converted to thermal energy.
60)d
It flattened as a natural consequence of collisions between particles in the nebula, changing random motions into more orderly ones.
61)E
Moon, Mercury, Mars, Venus, Earth
62)E
The planet must have a molten interior.
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