Chapter 22 - Oceanography

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Chapter 22 - Oceanography

• Oceanography ?
• What percentage of the Earth is covered with
  water? ?

• The scientific study of the ocean
• 70 covered by water
• 30 is covered by land

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• How do scientists study the ocean floor? ?

• Sonar
• Satellites
• Deep-sea corers
• Magnetic recorders
• Robotic vehicles

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Properties of Water

• Density ?
• Freezing point ?
• Boiling point ?

• Ice is less dense than liquid water because water
  EXPANDS as it freezes
• Salt water is MORE dense than fresh water
• 0oC and 32oF
• 100oC and 212oF

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Properties of Salt Water

• Salinity ?
• Salinity of ocean water is ?

• The measure of dissolved salts in water
• 35 grams of salt per 1000 grams of sea wateror
  35o/oo

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Composition of Seawater

• The two most abundant ions in seawater are ?

• Na 30 (sodium)
• Cl 55 (chlorine)
• NaCl is sodium chloride (table salt)

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Temperature in the Oceans

• Mixed Layer (Surface) ?
• Thermocline ?
• Deep water ?

• Most energy exchanged!!!!
• Rapid change in temperature
• Cold and no sunlight received

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