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Reminders Gone yesterday www.formontana.net

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Reminders Gone yesterday www.formontana.net

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    1. Reminders Gone yesterday? www.formontana.net/benson.html Today Attendance PowerPoint Presentation

    3. Why is the Dead Sea so salty? Lowest place on Earth 400 m below sea level 34 x 11 miles Salinity over 300 ppt

    5. NOTES: Ocean Currents See handout

    6. 1. What two factors increase the density of water in the oceans and seas? A. Salinity (see beaker on shelf) Freezing evaporation B. Cooling (why?)

    9. 2. What is super-cooled water, and what allows it to get so cold without freezing? A. liquid water that is colder than the normal freezing point (32 F or O C) B. salt (dissolved in the water lowers the freezing point)

    10. 3. What is a density current, and how do they benefit deep . . . A. movement of heavy water toward the bottom B. these currents take oxygen to the depths

    11. 4. Where in the oceans is the heaviest water found? Antarctica -1.9 C 34.6 o/oo

    12. 5.

    13. 6. German U-Boat World War II

    14. Strait of Gibraltar

    15. More about the U-boats . . . www.formontana.net/benson.html

    17. 7. Who made the first chart of the Gulf Stream? Ben Franklin

    19. 8. What three factors cause surface currents? Winds The position of land and the shape of the sea floor Coriolis Effect

    20. Warm, surface current 150 miles wide 1 mile deep 80 degrees F 60-100 miles/day (2.5 to 4 mph)

    21. 8 degrees warmer in winter

    22. 10. Why do surface currents generally flow clockwise (CW) in the northern hemisphere and counterclockwise (CCW) in the south. The Earth is spinning . . . This causes the Coriolis Effect.

    23. 11. What is upwelling, and how does it benefit the fishing industry? A. It is the movement of cold water to the surface B. It brings nutrients (fertilizer) that help algae grow . . . Fish eat algae.

    24. 12. What drives upwelling?

    25. 13. What effect does El Nino have on the upwelling along the west coast of S. America? It makes the upwelling stop.

    26. Send your notes handout to your left.

    27. Surface Currents BACK to #10

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