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Which solar system object has a kuiper belt? |
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Comet |
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Which of the following is the strongest evidence in support of the hypothesis that the solar system was formed by the collapse of a gas and dust nebula? |
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Images of stars with gas and dust disks surrounding them |
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Small planets do not have significant atmosphere because their _______ is weak. |
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Gravity |
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What conclusion can be drawn from the fact that some planets with solid surface and satellites have impact craters? |
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Planets and their satellites were showered by planetesimals |
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Which planet group has large orbital periods? |
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Jovian |
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Which of the following is true of the jovian planets? |
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All of these are correct |
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The 5th planet from the Sun is _______. |
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Jupiter |
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Compared to the ______ planets the ______ planets have ______. |
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Terrestrial; Jovian; many satellites |
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Which planet group contains rings? |
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Jovian |
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Which planet group has a faster spin? |
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Jovian |
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Which of the following lists the planets in increasing order of distance from the Sun? |
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, P;uto |
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The 7th planet from the Sun is _____. |
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Uranus |
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Which solar system object is icy? |
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Comet |
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Astronomers estimate that the age of the solar system is about _______ years. |
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4.6 billion |
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Which of the following is true of the terrestrial planets? |
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All of the choices are correct |
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According to the nebular hypothesis, which of the following sequences of events are chronologically correct? |
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Interstellar cloud, solar nebula, accretion, collisions between planetestimals, planets |
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Which solar system object has the most elliptical orbit? |
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Comet |
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Astronomers believe that the satellites of the Jovian planets were ______. |
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Planetestimals orbiting the growing planet |
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The Sun's mass is composed of ____ of elements other than Helium and Hydrogen. |
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2% |
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Why was the recent discovery that planets more massive than Jupiter orbit near-by stars in small orbits surprising? |
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Because according to the nebular hypothesis, massive planets should only form away from their star |
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Which planet group contains silicates? |
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Terrestrial |
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The Sun's mass is composed of _____ Helium. |
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27% |
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Which of the following explains the rocky nature of the inner planets? |
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Only the rocky material could condense at the higher temperatures of the inner part of the solar nebula |
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Which solar system object has low density? |
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Comet |
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Which planet group has an abundance of hydrogen and helium? |
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Jovian |
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Which planet group has a large mass? |
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Jovian |
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The Sun's mass is composed of _____ Hydrogen. |
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71% |
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Comets are ____ while asteroids are ____. |
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Icy; rocky |
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The 3rd planet from the Sun is ______. |
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Earth |
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The solar nebula is the disk of ____ from which the planets formed. |
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Gas and dust |
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The 6th planet from the Sun is _____. |
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Saturn |
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Which solar system object is 100km? |
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Asteroid |
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Which solar system object has on oort cloud? |
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Comet |
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The 1st planet from the Sun is _____. |
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Mercury |
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Which of the following statements is a critical issue resulting from such comparison? |
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Only very massive planets can form very near the star of extra-solar systems and the orbits of extra-solar planets can be very elliptical, suggesting that planets may migrate |
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Which solar system object has an asteroid belt? |
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Asteroid |
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Which planet group contains craters? |
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Terrestrial |
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Which planet group contains many satellites? |
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Jovian |
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A successful theory of the solar system must be able to primarily explain: |
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The fact that the planetary orbits lie approximately in the same place |
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Which solar system object is 10km? |
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Comet |
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Which of the following objects is not a member of the solar system? |
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The constellation of Orion |
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Which of the following explains the fact that the Jovian planets have more hydrogen and helium than terrestrial planets? |
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The higher temperatures near the center of the solar nebula prevented the condensation of hydrogen and helium in the inner part of the disk |
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The discovery of extra-solar planetary systems supports the idea that over time, planets may migrate inward. |
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True |
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As seen from the north celestial pole, the planets orbit the Sun in a clockwise direction. |
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False |
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The fact that some satellites and planets have cratered surfaces supports the hypothesis that planets and satellites were bombarded by planetestimals. |
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True |
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The discovery of extra-solar planets confirm Bode's Law. |
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False |
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