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==Key Stage 4==
===Meaning===
[[Sound]] is a [[longitudinal]] [[wave]] of [[Compression Wave|compression]] and [[rarefaction]] that [[Energy Transfer|transfers energy]] and [[information]] through a [[medium]].
===About Sound===
|[[File:VibrateSound1.gif|center]]
|-
| style="height:20px; width:200px; text-align:center;" |This animation shows a [[speaker]] creating a [[sound]] by making a [[wave]] of [[Compression Wave|compression]] (dark grey) that passes through the [[air]].
|}