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Tides. Cyclical rise and fall of the oceans in response to the forces exerted by the moon and sun. 3 April 2006 - 4 April 2006 Rye Beach - 40.9617° N, 73.6717° W 2006-04-03 03:13 EDT 7.82 feet High Tide 2006-04-03 10:19 EDT 0.07 feet Low Tide
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Cyclical rise and fall of the oceans in response to the forces exerted by the moon and sun. 3 April 2006 - 4 April 2006 Rye Beach - 40.9617° N, 73.6717° W 2006-04-03 03:13 EDT 7.82 feet High Tide 2006-04-03 10:19 EDT 0.07 feet Low Tide 2006-04-03 16:09 EDT 6.86 feet High Tide 2006-04-03 22:13 EDT 0.87 feet Low Tide 2006-04-04 04:16 EDT 7.23 feet High Tide 2006-04-04 11:25 EDT 0.45 feet Low Tide 2006-04-04 17:17 EDT 6.53 feet High Tide 2006-04-04 23:36 EDT 1.14 feet Low Tide Tidal data from http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Rye+Beach&units=f
Bay of Fundy, Nova Scotia: 21 foot tides! One of the greatest tidal variations on Earth!
High Tide Low Tide
Exactly WHY are there tides • Moon and Sun have a gravitational attraction on the Earth’s oceans which creates a bulge. • As the moon revolves around the Earth, the bulge moves across the Earth’s surface.
Types of Tides • Spring Tide • Unusually high tide. • The sun’s gravitational pull reinforces the moon’s gravitational pull. • Occurs during the new and full moon phase.
Types of Tides • Neap Tide • Unusually low tides • The sun’s gravitational pull is at a right angle to the moon’s gravitational pull • Occurs during the 1st and last quarter moon phases.
Monthly variation in the tidal bulge http://www.nos.noaa.gov/education/kits/tides/media/supp_tide06a.html
A • Name that: • Lunar Phase • Tide B C D