Science
What is the world's largest non-profit, scientific and educational organization?
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Which scientific term is best defined as an electrically charged atom?
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Where is the world’s most active volcano located?
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What spacecraft takes astronauts into space, orbits the Earth and can be flown more than once?
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How long does it take for Saturn to rotate completely on its axis (a typical day)?
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Which of these is a famous astronomer for whom a comet was named?
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