Share Presentation:   http://NeoK12.com/pres/ZOCEANS2
Oceans
  
Caribbean near Tulumby mdanys on Flickr

  • Oceans cover about 70% of the Earth's surface. 
  • Humans impact the ocean environment through everyday activities.
  • Important features of the ocean floor near the continents are the continental shelf, the continental slope, and the continental rise.
  • These areas are covered with thick layers of sediments (sand, mud, rocks).

Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Sailboatby el__vaquero on Flickr

  • The depth of the ocean varies. 
  • Ocean trenches are very deep, and the continental shelf is relatively shallow.
  • Ocean water is a complex mixture of gases (air) and dissolved solids (salts, especially sodium chloride).
  • Marine organisms are dependent on dissolved gases for survival.
  • The salinity of ocean water varies in some places depending on rates of evaporation and runoff from nearby land.

Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Arctic Sunsetby artic pj on Flickr

  • The basic motions of ocean water are the waves, ocean currents, and tides.

  • Ocean currents, including the Gulf Stream, are caused by wind patterns and the differences in water densities (due to salinity and temperature differences).

  • Ocean currents affect the mixing of ocean waters. This can affect plant and animal populations.

  • Currents also affect navigation routes.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Lanzada | Galicia - Españaby Paulo Brandão on Flickr

  • As the depth of ocean water increases, the temperature decreases, the pressure increases, and the amount of light decreases.
  • These factors influence the type of life forms that are present at a given depth.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Copaby laszlo-photo on Flickr

  • Plant- like plankton (phytoplankton) produce much of the Earth’s oxygen and serve as the base of the ocean ecosystem.

Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Better Luck THIS Time!by Kyle Kruchok on Flickr

  • Plankton flourish in areas where nutrient rich water upwells from the deep.
  • Phytoplanktons are eaten by animal-like plankton, swimming organisms, and those things that live on the ocean bottom.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide

 Share this Presentation:  http://NeoK12.com/pres/ZOCEANS2NeoK12.com - Educational Videos, Lessons, Quizzes & Presentations