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==Key Stage 3==
===Meaning===
The [[amplitude]] of a [[wave]] is the distance between the peak of a [[wave]] and the midpoint of the [[wave]].
===About Amplitude===
: The [[amplitude]] of a [[wave]] gives information on the [[intensity]] of that [[wave]].
The greater the [[amplitude]] of:
*Light - The brighter the [[light]].
*Sound - The louder the [[sound]].
*Water Wave - The taller the [[wave]].
==Key Stage 4==
===Meaning===
The height of a [[wave]] from the middle or "[[Equilibrium Position|equilibrium position]]".