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13. Ocean and Shorelines_06

13. Ocean and Shorelines_06 - OBJECTIVES FOR HYDROLOGIC...

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OBJECTIVES FOR HYDROLOGIC CYCLE, SHORELINES AND OCEANS 1) Be able to reproduce the hydrologic cycle and the formula for the hydrologic budget of a watershed. 2) What percent of the Earth’s surface is covered by ocean? 71% 3) What percent of ocean water is dissolved salt? 3.5% or 3500ppm 4) Which is most dense: a) salty or fresh water/ b) warm or cold water? a) Salty water is more dense b) Cold water (4 degrees C) 5) What drives surface currents, and what drives deep ocean currents? Wind drives surface currents Down welling of dense (cold and salty) water drives deep currents
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6) What effect do these currents have on the heat distribution of the planet? It redistributes heat from the equator to the poles 7) What causes tides? When do you get the highest and lowest high tides, what are they called, and what astronomical configuration gives rise to each? Gravitational pull of moon and sun Highest when moon and sun are in strait line (Spring Tide) Lowest when moon and sun and earth at right angles 8) What effect do tides have on the Earth’s rotation?
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