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Tides. Cyclical rise and fall of the oceans in response to the forces exerted by the moon and sun. Cyclical rise and fall of the oceans in response to.

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Presentation on theme: "Tides. Cyclical rise and fall of the oceans in response to the forces exerted by the moon and sun. Cyclical rise and fall of the oceans in response to."— Presentation transcript:

1 Tides

2 Cyclical rise and fall of the oceans in response to the forces exerted by the moon and sun. 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

3 Bay of Fundy, Nova Scotia: 21 foot tides! One of the greatest tidal variations on Earth!

4 High TideLow Tide

5 Exactly WHY are there tides Moon and Sun have a gravitational attraction on the Earth’s oceans which creates a bulge. 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. As the moon revolves around the Earth, the bulge moves across the Earth’s surface.

6 Types of Tides Spring Tide Spring Tide Unusually high tide. The sun’s gravitational pull reinforces the moon’s gravitational pull. Occurs during the new and full moon phase.

7 Types of Tides Neap Tide 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.

8 http://www.nos.noaa.gov/education/kits/tides/media/supp_tide06a.html Monthly variation in the tidal bulge

9 Name that: 1.Lunar Phase 2.Tide D C B A


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