Module 14: The Deep Ocean – Part 2

April 7, 2015 PowerPoint Honors Marine Biology Module 14 the deep ocean part 2 April 4 2013

You have done a good job presenting deep sea creatures this past week.  Those of you who did not have a chance to present will be able to do at our next class.

All the  SeaPerch projects are about finished.  If you have finished, the Team Leader should give it a test run prior to April 28.  If you are going to mount an underwater camera on the SeaPerch, do so at the test run.  Those of you who said that that you have hula-hoops to share for launch day, bring them to class on April 21.  Cameryn will be setting up the course at her pool and we want to have it completed ahead of time.

SeaPerch Team nearing completion

SeaPerch Team nearing completion

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.

Homework:

  1. Finish Module 14 reading ….
  2. Finish OYO Questions    …..
  3. Finish Study Guide questions ….
  4. Class Challenge – How many sit ups can you do in 1 minute?
  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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