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Sailing Technology Axial Rudder: An axial rudder is a vertical blade at the stern of a vessel that can be used to change direction. Multiple Masts and.

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Presentation on theme: "Sailing Technology Axial Rudder: An axial rudder is a vertical blade at the stern of a vessel that can be used to change direction. Multiple Masts and."— Presentation transcript:

1 Sailing Technology Axial Rudder: An axial rudder is a vertical blade at the stern of a vessel that can be used to change direction. Multiple Masts and Sails: A ship with multiple masts and sails can sail better into the wind. Watertight Compartments in Ship Hulls: These compartments prevent water from filling the entire hull of a ship after it has been damaged. L ESSON 17 – W HY D IDN ’ T C HINA D ISCOVER THE N EW W ORLD ? F OCUS M IDDLE S CHOOL W ORLD H ISTORY © C OUNCIL FOR E CONOMIC E DUCATION, N EW Y ORK, NY

2 Sailing Technology Leeboard: A leeboard is a board that is lowered into the water to prevent a ship from drifting sideways. Magnetic Compass: The magnetic compass allows sailors to determine the direction of the ship when navigators are out of sight of land. The magnetic compass made it possible to find direction at sea. L ESSON 17 – W HY D IDN ’ T C HINA D ISCOVER THE N EW W ORLD ? F OCUS M IDDLE S CHOOL W ORLD H ISTORY © C OUNCIL FOR E CONOMIC E DUCATION, N EW Y ORK, NY

3 Length of longest ship Number of masts of longest ship Number of ships in fleet Number of crew members in fleet Christopher Columbus (Explorer A) 85 feet3 masts3 ships90 Zheng He (Explorer B) 400 feet9 masts300 ships28,000 L ESSON 17 – W HY D IDN ’ T C HINA D ISCOVER THE N EW W ORLD ? F OCUS M IDDLE S CHOOL W ORLD H ISTORY © C OUNCIL FOR E CONOMIC E DUCATION, N EW Y ORK, NY

4 Resources and Technology Temple, Robert K. G., and Joseph Needham. The Genius of China: 3,000 Years of Science, Discovery, and Invention. New York: Simon and Schuster, When did each of the explorer’s society develop the following technology? Christopher Zheng He Columbus Axial Rudder12th Century1st Century Multiple Masts and Sails14th Century2nd Century Watertight Compartments in Ship Hulls18th Century2nd Century Leeboard16th Century8th Century Magnetic Compass12th Century9-11th Century L ESSON 17 – W HY D IDN ’ T C HINA D ISCOVER THE N EW W ORLD ? F OCUS M IDDLE S CHOOL W ORLD H ISTORY © C OUNCIL FOR E CONOMIC E DUCATION, N EW Y ORK, NY

5 Definition Incentive: Any reward or benefit, such as money, advantage or good feeling, that motivates people to do something. L ESSON 17 – W HY D IDN ’ T C HINA D ISCOVER THE N EW W ORLD ? F OCUS M IDDLE S CHOOL W ORLD H ISTORY © C OUNCIL FOR E CONOMIC E DUCATION, N EW Y ORK, NY


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