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Planets in our solar system are classified according to all of the following characteristics EXCEPT:
D. inhabitants
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What separates the terrestrial planets from the giantplanets?
B. asteroid belt
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Which of the planets has the shortest "year“?
C. Mercury
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What planet is called the "morning star" and the"evening star" depending on its position with respect to the Sun?
B. Venus
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Venus “shines” because it is
D. covered with clouds that reflect 80% of the sunlight
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The surface of Venus has been studied by all of the following except:
D. American space shuttle astronauts
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On Venus, the sun rises in the west. This is because
B. Venus rotates in the opposite direction of its revolution
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Humans could not live on Venus because
A. its atmospheric pressure is approximately 100 times that of Earth
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What feature on Mars was considered by some to be evidence of "life" on Mars?
C. channels or canals
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The unmanned NASA landers, Viking I and II
A. were not able to find evidence of life on Mars
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The Mars Exploration Rovers made important discoveries about
B. the past presence of water
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Jupiter radiates twice as much energy than it receives from the Sun because:
C. slow gravitational compression of the planet
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The Great Red Spot is thought to be a
B. high pressure region with high cold clouds
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Metallic hydrogen which surrounds the core of Jupiter is not:
C. a gas
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The "string of pearls" comet that hit Jupiter was named:
D. Shoemaker-Levy 9
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The last time humans walked on the Moon, this person was President of the United States:
D. Richard Nixon
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The term, “dirty snowballs” was coined to describe the nature of
B. comets
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Halley's comet is considered a
A. short-period comet
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A "shooting star" is a (an):
B. meteor
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The existence of the asteroid belt was "predicted" by
C. Bode
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The mass of the sun is how much larger than all of the other planets, moons, asteroids and other bodies in the solar system?
D. 700 times larger
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The distance from the Earth to the sun is called
C. an astronomical unit
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Mercury, Venus, Earth and Mars are called
B. terrestrial planets
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Which of the following compounds is most likely found in Jupiter?
A. hydrogen
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The outermost planet is
C. Neptune
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The planet that was named after the mythical Roman messenger of speed is
B. Mercury
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The planet that resembles the surface of the Earth's moon is
C. Mercury
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A day on this planet is longer than a year on this same planet:
B. Venus
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The atmospheric surface pressure of which of Venus is______ times that of Earth
B. 100
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Two conditions necessary for a planet to generate a magnetic field are:
A. molten center and rapid rate of rotation
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The day on this planet is about the same time period as a day on Earth:
C. Mars
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Mars has distinct surface feature related regions. Which of the following is not such a region?
D. ocean floors
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How many moons orbit Mars?
B. 2
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The largest planet in our solar system is
B. Jupiter
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Callisto, Europa, Gannymede, and Io are the
A. Galilean moons
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The density of Jupiter is
C. 25% that of the density of Earth
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The only moon in the solar system with a substantial atmosphere is
D. Titan
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The nature of Saturn's rings is thought to be
A. that of thousands of particles of narrow bands of various sizes
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The planet with the lowest average density, less than that of liquid water, is
C. Saturn
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The slow rotation or wobble, of the spinning axis of the Earth in space is called
C. precession
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