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25 Cards in this Set
- Front
- Back
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Density is defined as A) mass per unit B) weight per unit volume C) size divided by weight D) mass times weight E) weight divided by the planet's radius |
A) mass per unit weight |
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Which of the following are the Jovian planets? A) Jupiter, Saturn, Uranus, Neptune, and Pluto B) only Juptier C) only Jupiter and Saturn D) Jupiter, Saturn, Uranus, and Neptune only E) everything past Mars and the asteroid belt |
D) Jupiter, Saturn, Uranus, and Neptune only
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Which planet by itself contains the majority of mass of all the planets? A) Jupiter B) Saturn C) the Earth D) Venus E) Uranus |
A) Jupiter
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Planetary orbits A) are evenly spaced throughout the solar system B) are highly inclined to the ecliptic C) are almost circular, with low eccentricities D) have the sun at their exact center E) are spaced more closely together as they get further from the sun |
C) are almost circular, with low eccentricities
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Which of the following is not icy in composition? A) comet nuclei B) Kuiper Belt objects C) the polar cap of Mars D) asteroids E) most Jovian satellites |
D) asteroids
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What is true about solar system densities? A) The denser planets lie closer to the sun B) In differentiated bodies, the denser materials lie near the surfaces C) The asteroids all have about the same density D) Saturn has the same density as water E) Planetary density increases with increasing distance from the sun |
A) The denser planets lie closer to the sun
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The largest asteroid, and probably the only one to be a spherical "world" is A) Eros B) Ida C) Vesta D) Ceres E) Gaspra |
D) Ceres
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How much advance warning did we have of the close approach as asteroid 2002 MN in June 2002? A) None; it was found three days after its closest approach B) several weeks C) six years D) three days E) four hours |
A) None; it was found three days after its closest approach
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The Kuiper Belt is found where in the solar system? A) beyond the orbit of Neptune B) among the orbits of the terrestrial planets C) between the orbits of Mars and Juptier D) between the orbits of Jupiter and Uranus E) sixty degrees ahead or behind Jupiter |
A) beyond the orbit of Neptune
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The tail of a comet always points A) toward the sun and disappears at perihelion B) toward Earth and never varies C) away from the sun and disappears at perihelion D) away from the sun and becomes longest and brightest at perihelion E) in the direction of the comet's motion |
D) away from the sun and becomes longest and brightest at perhelion
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The Oort Cloud is believed to be A) a flattened belt of cometary nuclei just beyond the orbit of Neptune B) the circular disk of gas around the sun's equator form which the planets formed C) a grouping of asteroids and meteoroids between the orbits of Mars and Jupiter D) a spherical cloud of cometary nuclei far beyond the Kuiper Belt E) the great nebula found just below the belt starts of Orion |
D) a spherical cloud of cometary nuclei far beyond the Kuiper Belt
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Which of the following have an icy composition? A) most asteroids B) meteoroids C) comets D) the surfaces of Mars E) meteorites and most asteroids |
C) comets
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The Trojan asteroids are found A) orbiting around the Kuiper Belt body Hector B) with the others, between Mars and Jupiter; their red color gives them their name C) sixty degrees ahead or behind Jupiter, sharing its orbit around the sun D) beyond Neptune, with orbits similar to Pluto's E) closer on average to the sun than is the Earth |
C) sixty degrees ahead or behind Jupiter, sharing its orbit around the sun
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The most distant objects in out solar system are A) in the Kuiper Belt B) the Jovian planets C) in the Oort Cloud D) short period comets E) the Trojan asteroids |
C) in the Oort Cloud
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The first spacecraft to land on the surface of an asteroid was named A) Stardust B) Giotto C) Galileo D) NEAR E) Contour |
D) NEAR
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The most detailed look we've had of an asteroid comes from A) spacecraft sent to an asteroid B) ground based optical images C) Earth orbital X-ray images D) ground based radar images E) high-altitude UV spectroscopy |
A) spacecraft sent to an asteroid
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Meteor showers are A) usually annual events, as the orbits intersect B) caused by the Earth passing near the orbit of an Earth-grazing asteroid C) caused by the Earth passing near the orbit of an old short-period comet D) Both A and B are correct E) Both A and C are correct |
A) usually annual events, as the orbits intersect
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Meteorites are important because A) the contain pristine material from the solar nebula B) large ones may cause mass extinctions C) some come from the Moon and Mars, as well as the asteroid belt D) All of the above E) None of the above |
D) All of the above
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A meteor is A) a chunk of space debris that has struck the ground B) a streak of light in the atmosphere C) an icy body with a long tail extending from it D) a chunk of space debris orbiting Earth E) an irregularly shaped body, mostly found orbiting between Mars and Jupiter |
B) a streak of light in the atmosphere
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A meteorite is A) a chunk of space debris that has struck the ground B) a streak of light in the atmosphere C) an icy body with a long tail extending from it D) a chunk of space debris orbiting Earth E) an irregularly shaped body, mostly found orbiting between Mars and Jupiter |
A) a chunk of space debris that has struck the ground
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As the solar nebula contracts, it A) flattens out into the ecliptic plane around the sun's poles B) spins faster due to conservation of angular momentum C) cools due to condensation D) loses angular momentum E) reverses its direction of rotation |
B) spins faster due to conservation of angular momentum
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According to the Solar Nebula theory, planets A) should be randomly oriented to their star's equator. B) will revolve opposite the star's rotation. C) should be a common result of star formation. D) should be extremely rare. E) should orbit perpendicular to their star's equator |
C) should be a common result of star formation
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So far, beyond the solar system the extrasolar planets found have been mostly A) large jovians orbiting solar-type stars about where our jovians are found. B) large jovians with terrestrial-type orbits. C) terrestrials very close to their star, and transiting its disk. D) terrestrials with very elongated, distant orbits like comets. E) brown dwarfs much more massive than Jupiter. |
B) large Jovian with terrestrial-type orbits
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Most of the extrasolar planets found so far were detected by A) noting the drop in the star's light as the planet transits its disk. B) imaging them with the HST in the infrared, where they are easier to stop. C) noting the Doppler shifts of the star as the planet orbits it from side to side. D) receiving radio transmissions from them, much like Jupiter emits. E) detecting the oxygen in their atmospheres spectroscopically. |
C) noting the Doppler shifts of the star as the planet orbits it from side to side
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Which statement about extrasolar planets found to date is true? A) All are terrestrials, comparable in size to Earth. B) Few are found by Doppler shifts of their stars, due to their gravity. C) All lie more than 2 AU from their star. D) Most have orbital periods of more than a year. E) Some are so close to their stars that their periods are just a few days. |
E) Some are so close to their stars that their periods are just a few days
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