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History Assignment 3

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
navigation   art or science of directing a ship  
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uncharted   unmapped  
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observatory   a room or building having a telescope  
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era   a period of time  
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astrolabe   a device that enabled navgators to learn ships location by charting stars.  
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circumnavigate   to travel all the way around the globe  
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columbian exchange   the transfer of plants, animals, and diseases between the Americans and Europe, Asia, and Africa  
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caravel   ships that used triangular sails to sail against the wind, and had rudders to improve steering  
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Created by: jennaizbeast
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