Science
Which of these objects is an example of a simple machine?
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Which of these scientific terms is defined as the solid surface layer of a planet or moon?
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Ian Shelton, who discovered Supernova 1987A, while observing in Chile, was working for what university?
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What type of object does the "no-hair" theory describe?
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Approximately how many miles of wire are there in a 737?
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Which aeronautical term is a moveable surface on an aircraft which controls its motion?
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Which of the following is not a planet in our solar system?
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What is the final stage of ecological succession called?
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