History of Sails and Sailing
Catching the Wind with Sails
History
Ancient Egyptians developed the first sails around 4,000 B.C. using papyrus reeds.
http://www.gutenberg.org/files/17322/17322-h/images/080.jpg
HistoryAncient Greek and Roman ships used cotton
cloth and leather straps to make sails.
http://www.laits.utexas.edu/moore/sites/laits.utexas.edu.moore/files/images/9907140508_1024.preview.jpg
History
Sailing became used for trade and transportation throughout Europe, Asia, and northern Africa.
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Mast
A mast is the tall, vertical pole that supports the sail.
http://upload.wikimedia.org/wikipedia/commons/7/79/Balclutha_main_topgallant_mast.jpg
SpeedSpeed is an objects change in position over time.
How speedy you are is how much change you have in a set amount of time.
http://www.lookpictures.net/photos/registered_photos/7799-speedometer.jpg
Length
In this experiment, length will be the distance traveled in centimeters or inches.
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BalanceThe ability to be stable; equally distributed forces. In sail design, does the boat rock side
to side, or stay calm and balanced?
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Sail
Any type of surface used to move a vessel
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MaterialAnything made of matter. For this experiment, materials will be anything available to build your
sail.
http://cdn1.novadevelopment.com/images/completeMaterials01_tcm23-144221.jpg http://www.archkidecture.org/buildingsquares/bldgsquares_images/4materials.jpg
Predict
Tell what you think will happen
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PropertyCharacteristics – For this experiment, properties
will be any characteristic of the materials used (hard, soft, opaque, etc.)
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absorbent SOFT
plush
Test
Something used to determine ability or success
