Benchmark:
Objective: The students, after the lecture, will understand that organisms in the ocean can withstand pressure at greater depths because they have mechanisms/adaptations to regulate the gases in their body or do not have large air filled spaces.
The students, after the discussion, will draw a photosynthetic organism that is capable of increasing their resistance or drag in order to stay in the photic zone longer.
Agenda:
- Finish chapter 7 (Life on an Ocean Planet)
- Questions 8-12 Quiz 7b
- Review for Chapter 7 test
Journal/Elaboration (compare and contrast): Discuss why an organism would want to increase or decrease drag. How do they accomplish this?
Important terms/topics:
What happens to a diver's lungs/body as he descends to 20 meters and then ascends back to the surface?
How do organisms in the ocean withstand pressure at depth?
Why would some organisms prefer to drift in the current? Create a cinquain with the statement "...adrift in the current..."
compression, decompression, pressure, gas, air bladder, oily liver, pressure, photic, aphotic, ectotherm, endotherm, homeotherm
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