Science
What was so unusual about the Mercury space flights?
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What is the art of growing a miniature tree or trees in a low-sided pot or tray?
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What word is given to sounds that are too high for humans to hear?
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How far does a car moving at 60 miles per hour cover in one second?
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What is a spacecraft that orbits planets, moons or other large space objects called?
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What would you use to measure the mass difference between two like objects?
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