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: Singular [[Noun]]: '''Medium'''
: Plural [[Noun]]: '''Mediums'''
===About Mediumsa Medium===
: The [[air]] is a '''medium''' that [[sound]] can travel through. If there were no [[air]], [[sound]] could not travel from one place to another and we would not hear anything.
| style="height:20px; width:200px; text-align:center;" |A [[vibration]] causing [[sound]] to travel through a medium.
|}
==Key Stage 3==
===Meaning===
A '''medium''' is any [[material]] that [[sound]] or [[light]] travels through.
===About Media===
[[Sound]] can travel through the following '''media''':
*[[Solid]]s - [[Sound]] can passes most quickly through [[solid]] [[material]]s.
*[[Liquid]]s - [[Sound]] can pass through any [[liquid]].
*[[Gas]]es - [[Sound]] can passes most slowly through [[gas]]es, including [[air]].
: [[Sound]] cannot pass through a [[vacuum]].
[[Light]] can travel through the following '''media''':
*[[Transparent]] [[Solid]]s, [[Liquid]]s and [[Gas]]es - [[Light]] can pass through without being [[Absorb (Physics)|absorbed]].
*[[Translucent]] [[Solid]]s, [[Liquid]]s and [[Gas]]es - [[Light]] passes through [[translucent]] [[solid]]s but some of the [[light]] is [[Absorb (Physics)|absorbed]].
*[[Vacuum]] - [[Light]] can pass through a [[vacuum]].
==Key Stage 4==
===Meaning===
A '''medium''' is any [[material]] through which a [[wave]] travels.
===About Media===
[[Sound]] can be [[transmitted]] through the following '''media''':
*[[Solid]]s - [[Sound]] is [[transmitted]] most quickly through [[solid]] [[material]]s.
*[[Liquid]]s - [[Sound]] is [[transmitted]] through any [[liquid]].
*[[Gas]]es - [[Sound]] is [[transmitted]] most slowly through [[gas]]es, including [[air]].
: [[Sound]] cannot pass through a [[vacuum]].
[[Light]] can be [[transmitted]] through the following '''media''':
*[[Transparent]] [[Solid]]s, [[Liquid]]s and [[Gas]]es - [[Light]] is [[transmitted]] without being [[Absorb (Physics)|absorbed]].
*[[Translucent]] [[Solid]]s, [[Liquid]]s and [[Gas]]es - [[Light]] is [[transmitted]] through [[translucent]] [[solid]]s but some of the [[light]] is [[Absorb (Physics)|absorbed]].
*[[Vacuum]] - [[Light]] is [[transmitted]] through a [[vacuum]] at 300,000,000m/s.
: [[Light]] can also be [[scatter]]ed when being [[transmitted]] through a [[medium]] which is when the [[light]] collides with a [[particle]] in that [[medium]] and changes direction. The [[sky]] is blue because the [[Nitrogen]] in the [[Earth's Atmosphere|atmosphere]] [[scatter]]s blue [[light]].