Module 14: The Deep Ocean – Part 2

As we continue our study of the Deep Ocean, we learned that scientists only know about 5% of what lies in the Deep Ocean.  At these great depths, pressure is the determining factor for where an organism can live. The deeper depth, the greater the pressure.  Since the deep ocean is devoid of light, there us no need for countershading.  However, bioluminescence plays a significant role in an organisms ability to gather food and reproduce.

In the deep ocean there are the deep trenches and mid-ocean ridges.  These are areas of the earth’s crust that are slowly moving away from each other.  Sea water moves down through these cracks and gets heated to very high temperatures.  It then spews out vent areas, carrying with it dissolved minerals and hydrogen sulfide. We call these Hydrothermal Vents.

Hydrogen Sulfide is toxic to most creatures. However, around them there are thriving communities that live there.  They are like an oases in a desert!  Scientists have learned that there are types of bacteria that can extract the energy contained in certain minerals and use that energy to make organic matter.  They use a process similar to photosynthesis, but they substitute chemical energy for solar energy.  This process is called chemosynthesis. The two deep ocean vent communities that we studied are called Black Smokers and Cold Seeps.

Honors Marine Biology Module 14 the deep ocean part 2 April 4 2013


  1. Finish Module 14 reading ….
  2. Finish OYO Questions    …..
  3. Finish Study Guide questions ….
  4. Class Challenge
  5. Class Quiz on the Deep Ocean

Have a good week! – Mrs. S

“Expect to have hope rekindled.  Expect your prayers to be answered in wondrous ways. The dry seasons in life do not last.  The Spring rains will come again.”        -Sarah Ban Breathnach

“Rejoice in confident hope.  Be patient in trouble, and keep on praying.”        -Romans 12:12

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