QUESTION:
When icebergs "turtle" or roll over, do they make a very loud
noise in addition to the big waves? 

        From Caleb Hatcher, first grade Homeschooler
             Cairo, Georgia

ANSWER from Alan Hickey, Aboard the RV Polar Duke
            Sun, 9 Feb 1997 18:38:59 +0000 (GMT)

Dear Caleb,

They don't really make loud noises but they do send out a little wave, 
especially when the larger bergs turtle.  When a glacier calves, the 
noise and wave are far more dramatic.

Thanks for your question!
Alan Hickey