Ebbing the Tides

IntroductionAfter two days of fast sailing, with the winds helping with every bit, the watchman in the crow’s nest reports having spotted the first merchantship without an escort. With cheers and eager battlecries, the boat quickly maneuvers to a better position, and charges at the merchantship with complete surprise to board and overtakes the ship before it even has time to figure out what is happening. The treasures, provisions, and supplies are are hauled on board the vessel. Without further ado, the boatswain raises the sails and continue southwards.The Captain’s OrdersRead the log book Ocean Tides to get a basic foundation of tides and their role in the oceans. If you need more assistance, there is a computer on the Captain’s desk. If you use the computer, make sure you make a note where you got your information. Answer the questions and complete the following tasks using the log book, a calculator, and the internet.ObjectiveAssess the role of tidal forces on the earth.QuestionsDownload this image and label:Higher high waterHigher low waterLower high waterLower low waterTidal rangeTidal periodTidal datum means?MLW means?MLLW means?The period of a semidiurnal tide is?The period of a diurnal tide is?The definition of a semidiurnal mixed tide is?How long does it take the moon to orbit the Earth? What do we call that?The solid Earth then rotates once every 24 hours and 50 minutes under these bulges. Why the extra 50 minutes?Label Figure 1 and Figure 2 as spring tide or neap tide.Figure 1. Moon-Sun-Earth system in-lineFigure 2. Moon-Sun-Earth system in-lineWhich of the following is true of NEAP tides?Highest highsLowest lowsWhich of the following is true of NEAP tides?Largest tidal rangeSmallest tidal rangeWhich of the following is true of SPRING tides?Caused by constructive interferenceCaused by destructive interferenceWhich of the following is associated with NEAP tides?half moonsnew moonsfull moonsThe Bay of Fundy in Nova Scotia, Canada has the highest tidal range in the world. What is the range in meters?List all the ways in which marine organisms are affected by the tides.What is the tidal pattern shown in Figure 3. Boston, Massachusetts?diurnalsemidiurnalmixedWhat is the largest tidal range in Figure 3. Boston, Massachusetts?Figure 3. Boston, Massachusetts tidal data for 11/2013 to 12/2013What is the tidal pattern shown in Figure 4. Galveston, Texas?diurnalsemidiurnalmixedWhat is the largest tidal range in Figure 4. Galveston, Texas?Figure 4. Galveston, Texas tidal data for 11/2013 to 12/2013What is the tidal pattern shown in Figure 5. Florida?diurnalsemidiurnalsemidiurnal mixedWhat is the largest tidal range in Figure 5. Florida?Figure 5. Florida tidal data for 11/2013 to 12/2013How to Submit Your TaskAnswer the questions on a word processing document and label Figures 1 and 2. Once you have finished the assigned task, submit the document, Figure 1, and Figure 2 to the Captain’s dropbox.

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