Knots
A knot is a way to measure how fast a ship is travelling on the ocean or how fast a boat is going on a river. A knot is one nautical mile per hour, or a little more than one mile per hour. Fast Greek sailing ships could sail at about 14 knots (about 16 miles per hour), which is slower than a car goes on a busy city street.
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A fast motorboat today, though, can go about 40 to 50 knots - as fast as a car goes on the highway.
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Cite this page: Carr, Karen. "" Kidipede - History for Kids. 2011. http://www.historyforkids.org/learn/science/knots.htm
