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chapter 2 vocabulary part one

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
to spin around an axis   rotate  
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an imaginary line that runs through the center of Earth from the North Pole to the South Pole   axis  
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to travel in a closed path   revolve  
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the closed path of one object in space around another object   orbit  
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a natural body that revolves around a planet   moon  
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one of the shapes the moon seems to have as it orbits earth   phase  
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growing   waxing  
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shrinking   waning  
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less than half of the moon is illuminated or shining   crescent  
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more than half of the moon is illuminated or shining   gibbous  
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