Signed, Jeanna -Sharps Creek Elementary School. That question still remains unsolved today because the answer is a matter of personal preference. What we perceive as sound is actually the movement of energy. This energy is released from a central source and travels outward in all directions. The easiest and most efficient way for this energy to travel is in the form of a wave.
Sound waves are just like the waves in an ocean because it's the same scientific principle.
Waves need a substance to travel through in order to work. Air, water, even solid objects like steel work just find. However, sound will not travel through a vacuum like outer space. If you think about it, all those science fiction movies like Star Wars have a really big flaw. In all those space battle scenes you wouldn't be able to hear the roar of engines, zap of lasers, or spectacular explosions.