Multiple choice general knowledge math & puzzles As an iceberg melts, it makes a fizzing sound because of the ..... popping in the ice. condensed air bubbles compressed air bubbles hot air bubbles liquefied air bubbles Reveal answer Fill a bubble to check yourself B Correct answer Explanation Icebergs contain air bubbles trapped under high pressure during the formation of glacial ice. As the ice melts, these compressed air bubbles are released, creating a distinct 'fizzing' or 'popping' sound known as 'Bergie Seltzer'.