Sound - GCSE Physics Definition

Sound is a type of energy where tiny particles called molecules in the air move back and forth quickly, creating vibrations. These vibrations travel as waves from the sound source, like a speaker or a drum, to our ears. When these sound waves reach our ears, they make the eardrum vibrate, and our brains turn these vibrations into a sound we recognise, like music or someone's voice. In GCSE Physics, understanding sound involves learning about how these waves work, how they can move through different materials, and some of their important qualities, such as pitch and volume.