Hint
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Answer
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Which planet is closest to the Sun?
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Mercury
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What gas composes 96% of Venus's thick atmosphere, creating a runaway greenhouse effect?
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Carbon Dioxide
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What "belt" appears between the orbits of Mars and Jupiter?
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Asteroid Belt
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What is the largest object in that belt, named for the Roman goddess of agriculture?
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Ceres
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Name one of the four largest moons of Jupiter.
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Ganymede | Callisto | Europa | Io
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What type of planet is Pluto?
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Dwarf Planet
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What "belt" appears beyond the orbit of Neptune and is home to the above?
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Kuiper Belt
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To the nearest whole number, what is the mass of the sun as a percentage of the mass of the entire solar system?
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100%
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In what galaxy is our Solar System located?
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Milky Way
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What is the term for a model of our Solar System which places the sun at the center?
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Heliocentric
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What term refers to the distance between the Earth and the Sun?
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Astronomical Unit
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What Martian volcano is nearly three times higher than Mount Everest?
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Olympus Mons
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What is the name of the giant storm that has been visible on the surface of Jupiter since at least 1878, and probably much longer?
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Great Red Spot
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What comet appears in the inner solar system every 75–76 years?
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Halley's Comet
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What became, in 2012, the first human-built probe to exit the solar system?
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Voyager 1
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What is the nearest star to the sun?
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Proxima Centauri
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What gas composes 89% of the volume of Jupiter?
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Hydrogen
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What shape mysteriously appears on the north pole of Saturn?
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Hexagon
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What comet slammed into Jupiter in 1994 with the force of 6 trillion tons of TNT?
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Shoemaker–Levy
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What crystallized carbon substance do scientist think might rain from the sky on Jupiter, Saturn, Uranus, and Neptune?
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Diamonds
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From Wikipedia: "In 2006 the concept was adopted by the International Astronomical Union (IAU) as a category of sub-planetary objects, part of a three-way recategorization of bodies orbiting the Sun: planets, dwarf planets and small Solar System bodies. […] Since 2006 the IAU and perhaps the majority of astronomers have excluded them from the roster of planets." https://en.wikipedia.org/wiki/Dwarf_planet
I mean, CO2 already is for Carbon Dyoxide