A) Most are unchanged since their formation in the solar nebula.
B) They have similar densities.
C) They have similar orbital radii.
D) They have a similar range of orbital inclinations.
E) They have nothing in common with each other.
G) All of the above
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A) The 1994 impact of a chain of comet fragments into Jupiter
B) The impact thought to have wiped out the dinosaurs
C) The impact that created the Moon's largest crater
D) The ninth impact witnessed by astronomers in modern times
F) All of the above
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B) False
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A) nickel and iron
B) 80 percent nitrogen, 20 percent oxygen
C) 95 percent carbon dioxide
D) mostly hydrogen and helium
E) frozen methane, ammonia, water, and other gases and dust
G) A) and B)
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A) being a fragment from Comet Halley
B) being a fragment from the surface of Mars
C) being a fragment from the surface of the Moon
D) being a fragment of a shattered asteroid
F) B) and D)
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B) False
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A) boulder-size particle from an asteroid
B) boulder-size particle from a comet
C) pea-size particle from an asteroid
D) pea-size particle from a comet
E) microscopic particle of interstellar dust
G) D) and E)
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A) between the orbits of Mars and Jupiter
B) between the orbits of Earth and Mars
C) between the orbits of Jupiter and Saturn
D) beyond the orbit of Neptune
F) A) and D)
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A) in the asteroid belt
B) inside Jupiter's orbit
C) between the orbits of Jupiter and Neptune
D) near the radius at which they orbit today
E) in the Oort cloud
G) C) and D)
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A) Pluto
B) Charon
C) Sedna
D) Quaoar
E) Eris
G) A) and C)
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A) By imaging with powerful ground based telescopes.
B) By imaging with the Hubble Space Telescope.
C) By mapping with the New Horizons spacecraft.
D) By measuring the change in brightness as Charon eclipsed Pluto.
E) Pluto is too far away for its surface to be mapped.
G) C) and D)
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A) An icy object that orbits in the Kuiper belt and is larger than Pluto
B) The largest known asteroid
C) A moon of Pluto
D) An extrasolar planet ejected by another solar system and captured by ours
F) B) and D)
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A) near the jovian planets
B) outside Neptune's orbit
C) inside Jupiter's orbit
D) within the solar nebula, but far outside the orbit of Pluto
E) all of the above
G) D) and E)
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A) nickel and iron
B) 80 percent nitrogen, 20 percent oxygen
C) 95 percent carbon dioxide
D) mostly hydrogen and helium
E) frozen methane, ammonia, water, and other gases and dust
G) None of the above
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The Deep Impact mission sent an impactor...View Answer
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A) Pluto has a cometlike composition and density.
B) Pluto is smaller than many known comets, such as Halley's comet.
C) Some Kuiper-belt objects have their own moons.
D) Pluto has a more eccentric orbit than other planets.
E) Some known Kuiper-belt objects are hundreds of kilometers across.
G) B) and E)
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A) pea
B) baseball
C) car
D) basketball
F) A) and C)
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A) 1 trillion
B) 1,000
C) 100,000
D) 1 million
F) All of the above
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