130 likes | 160 Views
Explore the ancient origins of sails and sailing, from the Egyptians to modern trade routes. Learn about different sail materials, mast structures, and the importance of speed and balance. Predict and test the properties of various materials in sail construction.
E N D
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
History Ancient 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. http://bestgfx.com/uploads/posts/2011-07/1310378359_32hi4wkxenv9mgw.jpeg
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
Speed Speed 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. http://simplyzesty.com/wp-content/uploads//2011/07/measuring_success.jpg
Balance The ability to be stable; equally distributed forces. In sail design, does the boat rock side to side, or stay calm and balanced? http://breakingmuscle.com/sites/default/files/images/03/12/2011_-_1919/1balance.jpg
Sail Any type of surface used to move a vessel http://www.jwoolfden.com/jpg/USCGC_Eagle_under_sail.jpg
Material Anything 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 http://www.thenoisecast.com/wp-content/uploads/2011/03/fortune-teller.jpg
Property Characteristics – For this experiment, properties will be any characteristic of the materials used (hard, soft, opaque, etc.) absorbent soft plush http://www.globaltextiles.com/html/images/upload/tradeleads/555/554823.jpg
Test Something used to determine ability or success