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Which of these is considered "work"?
Science
Which of these is considered "work"?
Picking Up Books
Lying Down
Standing Still
Leaning Against A Wall
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Which of these is the best definition of a compound machine?
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What means having two eyes facing forward?
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Which scientific term means "a small body of water"?
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In math, "pi" is equal to?
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Earthmen first sent a spacecraft to which planet?
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What do our bodies need from the air we breathe?
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What is the distance between two peaks of a wave called?
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What type of lens has a thin middle and makes objects appear smaller?
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