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23-5  The Oceans
Oceans <ul><li>Ocean water is a mixture of salts and gases. </li></ul><ul><li>Salinity is the proportion of dissolved alts...
Oceans <ul><li>Light and Temperature decrease the deeper you go </li></ul><ul><li>Pressure increases as you go deeper. Dee...
Currents <ul><li>surface currents  – a large stream of water moving in the same direction, caused by wind blowing across t...
Wave erosion and Deposition <ul><li>Hydraulic action  occurs when waves pound cracks in rocks. </li></ul><ul><li>Abrasion ...
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23 5 Oceans

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Transcript of "23 5 Oceans"

  1. 1. 23-5 The Oceans
  2. 2. Oceans <ul><li>Ocean water is a mixture of salts and gases. </li></ul><ul><li>Salinity is the proportion of dissolved alts in water. </li></ul><ul><li>Continental shelf is a gentle sloping plain of shallow water forming along the coasts of the continents. </li></ul><ul><li>Past the shelf is a continual slope. </li></ul><ul><li>Trenches cut through the shelf and slope. </li></ul>
  3. 3. Oceans <ul><li>Light and Temperature decrease the deeper you go </li></ul><ul><li>Pressure increases as you go deeper. Deep ocean is about 50x greater than the atmosphere </li></ul>
  4. 4. Currents <ul><li>surface currents – a large stream of water moving in the same direction, caused by wind blowing across the ocean surface. </li></ul><ul><li>Generally the follow wind patterns – warm water moves away from equator and vice versa </li></ul><ul><li>Deep currents – caused be difference in the density of ocean water </li></ul><ul><li>Upwelling – winds blow warm surface water aside allowing cold water to replace it </li></ul>
  5. 5. Wave erosion and Deposition <ul><li>Hydraulic action occurs when waves pound cracks in rocks. </li></ul><ul><li>Abrasion occurs when sediment carried by waves acts like sandpaper to erode rocks. </li></ul><ul><li>Longshore drift moves sand along a shore. </li></ul><ul><li>Depositing this sediment creates beaches. </li></ul><ul><li>Show waves crashing video </li></ul>
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