Name ______Period ______Date ______
Chapter 9: Tides: Read pages 277 – 289 then answer the questions below.
9.3 “What Do Tides Look Like in the Ocean?”
(1) Define Amphidromic Point:
(2) Define Cotidal Lines:
(3) How often are conditions right to produce the maximum tide-generating force?
(4) Are tides considered deep-water waves anywhere in the ocean? Why or why not?
(5) What are reasons why the tides don’t follow a simple tidal bulge model?
9.4 “What Types of Tidal Patterns Exist?”
(6) What is a diurnal tidal pattern?
(7) Copy the 3 graphs on the right side of p.279 - be sure to label everything.
(8) Explain negative values for tides. (9) Define semidiurnal tidal pattern.
(10) What is a mixed tidal pattern?
(11) How many high and low tides are there in a lunar day?
(18) Which of the three tidal patterns is most common in the 3 places listed below?
- the U.S. East Coast
- the U.S. West Coast
- Worldwide
9.5 “What Tidal Phenomena Occur in Coastal Regions?”
(19) What produces standing waves?
(20) What produces a tidal bore?
(21) What is a tidal bore?
(22) What river is probably the longest estuary affected by oceanic tides according to the article on p. 281?
(23) What is a pororocas?
(24) Copy and label the map on p.281:
(25) Give 5 important details about the Bay of Fundy:
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(26) What is a rotary current?
(27) What is a reversing current?
(28) How is a flood current produced?
(29) How is an ebb current produced?
(30) What is high slack water?
(31) What is low slack water?
(32) In reference to what is the Titanic mentioned in your reading?
(33) Define a whirlpool. (34) What is the Maelstrom?
(35) What are grunion and how are they unique (top of p. 284)?
(36) List four coastal tidal phenomena:
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(37) Of flood current, ebb current, high slack water, and low slack water, when is the best time to enter a bay by boat? When is the best time to navigate in a shallow, rocky harbor? Explain.
9.6 “What Do Tides Look Like in the Ocean?”
(8) What are some disadvantages of tidal power?
(8) What are the two way tidal power can be harnessed?
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(9) Where is the location of the largest tidal range in the world?
(10) What is an example of an advantage of a larger power plant over a smaller pant?
(11) What can be harnessed as a source of energy as a result of ocean tides?
(12) Explain how a tidal power plant works, using as an example an estuary that has a mixed tidal pattern. Why does potential for usable tidal energy increase with an increase in the tidal range?