Air is heated instantly when an electric charge of lightning passes through it.
The heat causes the molecules to expand, or fly out, in all directions. As the molecules seek more room, they collide violently with layers of cool air and set up a great air wave that has the sound of thunder. World Book Encyclopedia , 2000. Some speculate that music helps integrate the two hemispheres of the brain, helping increase overall brain function. There is considerable debate regarding the extent to which listening to music can help with math.