19,879
edits
Changes
→Key Stage 3
==Key Stage 3==
===Meaning===
[[Sound]] is a [[longitudinal]] [[wave]] of compression that can pass through a [[material]].
===About Sound===
: [[Sound]] is a [[Longitudinal Wave|longitudinal wave]]s can pass through [[solid]]s, [[liquid]]s and [[gas]]es but [[sound]] cannot pass through a [[vacuum]].
: [[Sound]] is transmitted by [[particle]]s colliding with one another.
{| class="wikitable"
|-
| style="height:20px; width:200px; text-align:center;" |This animation shows a [[speaker]] creating a sound by making a [[wave]] of compression (dark grey) that passes through the [[air]].
|}
===Medium===
: [[Sound]] [[wave]]s can pass through [[solid]]s, [[liquid]]s and [[gas]]es but [[sound]] cannot pass through a [[vacuum]].
: [[Sound]] travels fastest through a [[solid]] because the [[particle]]s are already touching so they have little distance to travel to pass on the [[vibration]].
: [[Sound]] travels the slowest through a [[gas]] because the [[particle]]s in a [[gas]] are spread far apart so they take some time before they [[collide]] with the next [[particle]] to pass on the [[vibration]].
{| class="wikitable"
|-
|[[File:ParticleModelSolidLiquidGas.png|center|500px]]
|-
| style="height:20px; width:200px; text-align:center;" |A [[diagram]] showing the '''particle model''' for [[solid]]s, [[liquid]]s and [[gas]]es.
|}
: The [[speed]] of [[sound]] through [[air]] is 340[[m/s]].
===Sound Volume===