Science
Where is the observatory where Percival Lowell first theorized the existence of Pluto?
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Which scientific term is best defined as an electrically charged atom?
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During the seventeen hundreds, what creature was thought to excrete blood through its skin?
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The Sun's mass is approximately how many times as great as Earth's?
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What is a body's resistance to changes in motion or speed called?
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What is the name of an instrument that records vibrations in the Earth's crust?
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