1. What is the surface zone also called?


2.  How deep is it?


3.  What is the depth of the transition zone?


4.  What is the thermocline?


5.  What is below the transition zone?


6.  How deep is it?


7.  What zone is beneath that?  (the zone asked for in #5)


8.  What is the upper layer called where photosynthesis occurs?


9.  What type of light, if any, is found in the deep zone?


10.  What color is most absorbed by water?  What color is least absorbed?


11.  What factors affect sound travel in the oceans?


12.  What was the "afternoon effect" observed in WWII?


13.  What is the SOFAR layer?


14.  What do acoustic studies observe in oceans?


15.  What do animals use sound for in the oceans?