Oceans+2+review

 **All questions in purple are checked by Hesmaster and are correct.**
 * HES Water World 2 Objectives**
 * You know what to do...same rules. Remember to write only your first name or web name!**

**-Julian- ** **14. What causes most surface currents in the ocean?** wind -Veronica
 * // Make sure you can interpret a tides diagram of the Sun, Earth and Moon such as the one we had on the board. Anyone want to upload one here showing Sun-Earth-Moon positions for spring and neap tides?  //  **

**15. What direction do the equatorial currents flow?** east to west -amanda

**16. What causes ocean gyres? What direction do they rotate north of the equator?** the coriolis effect. they rotate clockwise north of the equator. -Veronica  The deflective effect of the earth's rotation on all free-moving objects, including the atmosphere and oceans.  -Julian- // Which direction do objects deflect because of it N of the equator? South of the equator? //
 * 17. Explain the Coriolis Effect. **

north of equator- counter clockwise south of equator- clockwise -Christina

North of equator-clockwise South of equator-counter clockwise -Julian-

upwelling happens when the surface layer of the ocean is blown away by the wind, and the cold water rises. It's important because it carries nutrients to the surface, which are essential for fish, and other ocean animals. - Veronica
 * 18. What is upwelling? Why does it happen? Why is it important? **


 * 19. Explain the model for thermohaline circulation.** as cold water sinks to the bottom of the ocean it travels the floor and then it wants to become warm and it raises to the surface and it repeats sinking and raising. ~sam

400-2000 years -Julian-
 * 20. How long does it take for a parcel of water to circulate all the way through the “ocean conveyor belt”?**

Tides happen because of the moons pull. What creates the high tides and low tides is the rotation with the moon. -Julian- **22. In the simplest model, how many tides happen each day?** you have your two high and two low tide.. - Shelby. **23. How many hours are there between two similar tides? Between a high and a low tide?** About 12 1/2 hours between each of the same tide. About 6 hours between high and low. - Shelby.
 * 21. How do tides happen? Describe a high tide vs. a low tide.**

Tides occur during quarter moons. Neap tides are very weak tides, the gravitational forces of the moon and the sun are perpendicular to one another. They are moderate tides, the Highs not as high as normal, the Lows not as low as normal. - Shelby.
 * 23. What are neap tides? When do they happen? (phase of moon) **

Occur during full or new moon. Tides are very strong. The gravitational forces of the moon and sun contribute to the high rise and low fall of the tides. Spring tides, have nothing to deal with the season of spring. These tides are extreme, the Highs and lows are higher and lower than normal. - Shelby.
 * 24. What are spring tides? When do they happen? (phase of moon)**

25. **What is an El Nino event? Why does it happen?** when there is abnormal wind patterns and the winds are weaker, which stops the upwelling of colder water causing the ocean to warm. this results in temperature increase, floods, droughts, etc. it happens because the relationship between the ocean and the atmosphere is disturbed. -amanda they make winters warmer. -Veronica
 * 26. How do El Ninos affect ** ** Michigan ** ** weather? **