shorelinesI

shorelinesI - Physical Geology 101 32. Shorelines I (p....

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Physical Geology 101 1 32. Shorelines I (p. 538-545; 559-562) Ocean Currents The oceans are in constant motion on the global scale, with water migrating around the continents and across the ocean basins as ocean currents. The ocean currents are slow, broad drifts of water. What are they driven by? ____________________________________________ As the winds move across the surface of the ocean, friction between the air and the water drags the water forward. How deep do ocean currents reach in the ocean? ____________ The ocean currents have a noticeable effect on global and local climate. One reason is the small range of temperature extremes in the oceans (-2°C to 36°C; range of ____°C) compared to the continents (-88°C to 58°C; range of _____°C). The ocean moderates temperatures, which is why coastal regions are often preferred settlement locations. Most of the world's population actually lives within ___________ of the ocean. Even in mid-winter, temperatures may be a lot milder close to the oceans (e.g. Seattle; Portland). In the southern hemisphere, cold ocean currents flow north from the southern polar regions along the western sides of the continents. This results in low rainfall and more deserts . Example: ________________________ Current: ______________________ Warm ocean currents flow south away from the equator and result in high rainfall and lush vegetation along the eastern sides of the continents. Example: ________________________ Current: _______________________ What warm current flows northeast across the Atlantic Ocean from the Gulf of Mexico, warming locations like Iceland and Great Britain? __________________________ Shorelines A shoreline is a boundary between land and sea. It extends from _______________________ up to ________________________________________________________. Tides, waves, and nearshore currents constantly modify existing shoreline features. So it is a high energy environment where erosion takes place and sediment is transported and deposited.
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Physical Geology 101 2 Tides Tides are regular cycles of upward and downward motion of the ocean surface due to the gravitational effects of the ___________ and to a lesser extent the ___________. The gravitational attraction of the moon causes ocean water to form an upward bulge in the location on
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This note was uploaded on 01/13/2012 for the course GEOL 101 taught by Professor Williams,t during the Fall '08 term at Idaho.

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shorelinesI - Physical Geology 101 32. Shorelines I (p....

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