### OCN 201 Fourteenth Quiz Questions

## Tides

#### Pinet - Chapter 8, p. 264

#### 8-1 Tidal Characteristics

1. Define tidal range. (See figs. 8-2 and 8-3, and p. 638)

2. Explain why tide waves carry much higher energy than other waves.

3. Define diurnal tide. (Also see figs. 8-3a and 8-6, and p. 627)

4. Define semidiurnal tide. (Also see figs. 8-4 and 8-6, and p. 636)

5. Define mixed tide. (Also see figs. 8-3a and 8-6 and p. 632)

6. Define spring tide. (See fig. 8-7, and p. 637)

7. Define neap tide. (See fig. 8-7, and p. 633)

8. Explain why the ideal form of a tide wave is distorted.

#### 8-2 Origin of the Tides

9. List the two primary factors that generate tides. (See fig. 8-5)

10. Explain why the tide-generating force of the Moon is great than the Sun.

11. Contrast the sizes of the tide waves generated by the Moon and the Sun.

12. Where is the tidal bulge generated by the Moon's gravitational effect relative to the Moon's position? (Also see fig. 8-5a)

13. Where is the tidal bulge generated by the Moon's centrifugal effect relative to the Moon's position? (Also see fig. 8-5b)

14. Explain why Earth and the Moon revolve around a point inside Earth and not halfway between Earth and the Moon. (Also see fig. 8-5b)

**Equilibrium Model of Tides**

15. List the three key assumptions for the equilibrium model of tides, a simplistic tide model.

16. Explain why most points on Earth experience two high tides and two low tides everyday in the equilibrium model of tides. (Also see fig. 8-5c)

17. Give the declination of the Earth-Moon System. (See fig. 8-6)

18. Explain why the tidal range is high during new moon, low during 1st quarter moon, high during full moon, and low during last quarter moon. (Also see fig. 8-7b)

19. Explain why the same point in the tide comes 50 minutes later the following day.

**Dynamic Model of theTides**

20. Explain why the Dynamic Model of Tide is a more accurate depiction of tides. (Also see fig. 8-8)