Basic Oceanography

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Basic Oceanography

• Presented by
• Casey Spinler

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Oceans

• Trivia
• http//www.quia.com/cb/14762.html
• http//www.bbc.co.uk/nature/programmes/tv/blueplan
  et/quiz_fun.shtml
• Pacific
• Atlantic
• Indian
• Arctic

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4 biological zones

• Polar
• Cold temperate
• Warm temperate
• Tropical
• http//envisat.esa.int/live/envisat_live_09.htm

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Temperature

• Metabolism functions at 0-40
• Some exceptions
• Cyanobacteria lives in approx 85 C
• hot springs

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Plate Tectonics

• Plates- earths crust divided into a number of
  large units
• Bounded by ridge and trench system
• Sizes vary but mainly 7 plates
• Float on underlying mantle-move slowly
• Continental Drift-plates moved the continents
  over time

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Plate Tectonics cont

• Ridges- new crust is formed
• Lead to seafloor spreading
• Trenches(subduction)- one plate goes underneath
  another
• Both-volcanic and seismic activity
• Plate boundaries-weak spots in the earths
  crust, mantle pushes up